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Datasheet File OCR Text:

19-2925; Rev 0; 8/03
KIT ATION EVALU ABLE AVAIL
Audio/Video Switch for Three SCART Connectors
General Description Features
o Low -86dB Video Signal-to-Noise Ratio o 150 Driver on All Video Outputs, Including the RF Modulator o Full CVBS Loop-Through on AUX SCART o Programmable Audio Gain Control of -56dB to +6dB (TV Audio Outputs) o Clickless Audio Switching (TV Audio Outputs) o Programmable Clamp or Bias on Red/Chroma Video Inputs o Programmable Video Gain of +6dB, 1dB on RGB Outputs o +5V and +12V Standard Supply Voltages o 27MHz -3dB Large-Signal Bandwidth on All Video Drivers o Supports Three SCART Connectors
MAX4399
The MAX4399 audio/video switch is ideal for digital settop box applications. The MAX4399 provides video and audio routing from the MPEG decoder source to the TV, VCR, and AUX SCART (peritelevision) connectors. In addition, the TV audio channel features clickless switching and programmable volume control from -56dB to +6dB in 2dB steps. The device can mix an auxiliary audio tone into the TV audio channel and can mix the stereo audio signal into a mono audio signal. The MAX4399 directly drives an external RF modulator with a composite video with blanking and sound (CVBS) signal created by an on-chip luma/chroma (Y/C) mixer and external RLC trap filter. The MAX4399 features a fast-mode I2CTM-compatible 2-wire interface allowing communication at data rates up to 400kbps. The MAX4399 operates with standard +5V and +12V single supplies and supports slow and fast switching. All video and audio inputs are AC-coupled. The DC biases of all input and output signals are set to predefined levels. All video outputs, including the RF modulator, drive standard 150 loads. Red, green, and blue (RGB) outputs feature a programmable gain of +6dB 1dB. All other video outputs have a fixed +6dB gain. The VCR and AUX audio output gains are programmable for -6dB, 0dB, and +6dB. The MAX4399 is available in a compact 68-pin thin QFN package and is specified for the 0C to +70C commercial temperature range. The MAX4399 evaluation kit is available to help speed designs.
Ordering Information
PART MAX4399CTK TEMP RANGE 0C to +70C PIN-PACKAGE 68 Thin QFN
Typical Operating Circuit
VIDEO DIGITAL AUDIO +5V +12V +5V RGB CVBS S-VHS RGB R/L AUDIO SLOW SWITCHING FAST SWITCHING CVBS TV SCART CONNECTOR
Applications
Satellite Receivers Satellite Set-Top Boxes Cable Set-Top Boxes Terrestrial Set-Top Boxes Game Consoles TVs Digital Television (DTV) VCRs
SATELLITE DISH STB ENCODER
S-VHS CVBS R/L AUDIO FAST SWITCHING I2C-COMPATIBLE 2-WIRE INTERFACE SCART SWITCH MATRIX
MAX4399
TONE INPUT CVBS S-VHS
MONO AUDIO
CHANNEL 3/4 RF MODULATOR
SUBCARRIER TRAP
R/L PHONO AUDIO RGB CVBS S-VHS R/L AUDIO SLOW SWITCHING AUXILIARY SCART CONNECTOR
DVD Players DVD+R/W Players
Purchase of I2C components of Maxim Integrated Products, Inc. or one of its sublicensed Associated Companies, conveys a license under the Philips I2C Patent Rights to use these components in an I2C system, provided that the system conforms to the I2C Standard Specification as defined by Philips.
VCR SCART CONNECTOR
R/L AUDIO FAST SWITCHING SLOW SWITCHING
VIDEO GROUND DIGITAL GROUND
AUDIO GROUND
________________________________________________________________ Maxim Integrated Products
1
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Audio/Video Switch for Three SCART Connectors MAX4399
ABSOLUTE MAXIMUM RATINGS
Voltages V_VID to G_VID .....................................................-0.3V to +6V V12 to G_AUD .....................................................-0.3V to +14V V_DIG to G_DIG ....................................................-0.3V to +6V G_AUD to G_DIG ...............................................-0.1V to +0.1V G_VID to G_DIG .................................................-0.1V to +0.1V G_AUD to G_VID ................................................-0.1V to +0.1V Video Inputs, Video Outputs, ENC_FS_IN, VCR_FS_IN, VID_BIAS, TRAP ................................-0.3V to (VV_VID + 0.3V) V_AUD to G_AUD................................................-0.3V to +9V Audio Inputs, Audio Outputs, AUD_BIAS........................................-0.3V to (VV_AUD + 0.3V) SDA, SCL, DEV_ADDR, INTERRUPT_OUT .........-0.3V to +6V AUX_SS, TV_SS, VCR_SS ....................-0.3V to (VV12 + 0.3V) Currents INTERRUPT_OUT ..........................................................+50mA TRAP................................................................................4mA Output Short Circuit Video Outputs and TV_FS_OUT to V_VID, V_DIG, G_AUD, G_VID, or G_DIG ........................Continuous Audio Outputs to V_AUD, V_VID, V_DIG, G_AUD, G_VID, or G_DIG.....................................Continuous AUX_SS, TV_SS, and VCR_SS to V12, V_AUD, V_VID, V_DIG, G_AUD, G_VID, or G_DIG...................................................Continuous Continuous Power Dissipation (TA = +70C) 68-Pin Thin QFN (derate 41.7mW/C above +70C).........................................................3333.3mW Operating Temperature Range...............................0C to +70C Junction Temperature ......................................................+150C Storage Temperature Range .............................-65C to +150C Lead Temperature (soldering, 10s) .................................+300C
Stresses beyond those listed under "Absolute Maximum Ratings" may cause permanent damage to the device. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(VV12 = 12V, VV_VID = 5V, VV_DIG = 5V, 0.47F X5R capacitor in parallel with a 10F aluminum electrolytic capacitor from V_AUD to G_AUD, no load, TA = 0C to +70C, unless otherwise noted. Typical values are at TA = +25C.) (Note 1)
PARAMETER DC V12 Supply Voltage Range V_VID Supply Voltage Range V_DIG Supply Voltage Range V12 Quiescent Supply Current V_VID Quiescent Supply Current V_VID Standby Supply Current V_DIG Quiescent Supply Current VIDEO CVBS and S-VHS Voltage Gain 1VP-P input R, G, B, gain = 5dB R, G, B, gain = 6dB R, G, B, gain = 7dB Small-Signal Bandwidth, -3dB 100mVP-P input, gain = 6dB 1VP-P input, gain = 6dB, TA = +25C (Note 2) CVBS and S-VHS R, G, B CVBS and S-VHS R, G, B 15 5.5 4.5 5.5 6.5 6 5 6 7 110 110 27 MHz 30 6.5 5.5 6.5 7.5 MHz dB All video output amplifiers are enabled, no load All video output amplifiers are in shutdown, and TV_FS_OUT driver is in shutdown Inferred from the slow switch output levels Inferred from the output swing of the video outputs 11.4 4.75 4.75 12 5 5 17 51 19 1 12.6 5.25 5.25 35 116 34 3 V V V mA mA mA mA SYMBOL CONDITIONS MIN TYP MAX UNITS
Large-Signal Bandwidth, -3dB
2
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Audio/Video Switch for Three SCART Connectors
ELECTRICAL CHARACTERISTICS (continued)
(VV12 = 12V, VV_VID = 5V, VV_DIG = 5V, 0.47F X5R capacitor in parallel with a 10F aluminum electrolytic capacitor from V_AUD to G_AUD, no load, TA = 0C to +70C, unless otherwise noted. Typical values are at TA = +25C.) (Note 1)
PARAMETER Slew Rate Gain Matching Differential Gain DG SYMBOL SR CONDITIONS 1VP-P input, gain = 6dB 1VP-P input, between RGB or Y-C 5-step modulated staircase 5-step modulated staircase 1VP-P input f = 0.1MHz to 6MHz RF_CVBS_OUT All other video outputs RF_CVBS_OUT All other video outputs RF_CVBS_OUT All other video outputs -0.5 MIN TYP 170 0 0.03 % 0.13 0.09 degrees 0.36 -86 5 3 1.21 1.88 -2 0 60 4 11 2.5 RGB, composite, and luma Chroma Pulldown Resistance Crosstalk Mute Suppression AUDIO V_AUD Voltage Voltage Gain Gain Matching Between Channels Gain Flatness Frequency Bandwidth Generated by internal linear regulator 1.414VP-P input, gain = 0dB 1.414VP-P input, gain = 0dB f = 20Hz to 20kHz, 0.5VRMS input, gain = 0dB 0.5VRMS input; frequency where output is -3dB with 1kHz serving as 0dB -0.25 -0.5 8.1 0 0 0.005 210 +0.25 +0.5 V dB dB dB kHz VCR_R/C_OUT, AUX_R/C_OUT, TV_R/C_OUT f = 4.43MHz, 1VP-P input, between any two active inputs f = 4.43MHz, 1VP-P input, on one input 4.2 1.05 2.24 10 -63 -65 dB dB 8.0 +2 dB ns V V % dB M k A V +0.5 MAX UNITS V/s dB
MAX4399
Differential Phase Signal-to-Noise Ratio Group Delay Bottom Level Clamp Chroma Bias Sync Crush Power-Supply Rejection Ratio Input Impedance Input Clamp Current Output Bias Voltage
DP SNR
RGB, composite and luma, no signal, no load Chroma only, no signal, no load Percentage reduction in sync pulse (0.3VP-P); inferred from input clamping current with a 0.1F coupling capacitor PSRR f = 100kHz, 0.5VP-P CVBS, Y, or RGB video input Chroma video input VIN = 1.75V No signal, no load
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Audio/Video Switch for Three SCART Connectors MAX4399
ELECTRICAL CHARACTERISTICS (continued)
(VV12 = 12V, VV_VID = 5V, VV_DIG = 5V, 0.47F X5R capacitor in parallel with a 10F aluminum electrolytic capacitor from V_AUD to G_AUD, no load, TA = 0C to +70C, unless otherwise noted. Typical values are at TA = +25C.) (Note 1)
PARAMETER Input DC Level Input Signal Amplitude Input Resistance Output DC Level Signal-to-Noise Ratio Total Harmonic Distortion Output Impedance 1.414VP-P input PSRR TV audio, volume control range extends from -56dB to +6dB VCR, AUX audio Power-Supply Rejection Ratio Mute Suppression Audio Limiter Level Crosstalk DIGITAL INTERFACE: SDA and SCL Low-Level Input Voltage High-Level Input Voltage Hysteresis of Schmitt Trigger Input SDA Low-Level Output Voltage Output Fall Time for SDA Line Spike Suppression Input Current Input Capacitance SCL Clock Frequency Hold Time Low Period of SCL Clock High Period of SCL Clock Setup Time for a Repeated Start Condition Data Hold Time Data Setup Time Maximum Receive SCL/SDA Rise Time tHD,STA tLOW tHIGH tSU,STA tHD,DAT tSU,DAT tR (Note 3) Repeated start condition 0 0.6 1.3 0.6 0.6 0 100 300 0.9 VIL = 0V, VIH = 5V -10 5 400 VOL ISINK = 3mA ISINK = 6mA 400pF bus load 50 +10 0 0 VIL VIH 2.6 0.2 0.4 0.6 250 0.8 V V V V ns ns A pF kHz s s s s s ns ns f = 1kHz, 0.5VP-P f = 1kHz, 0.5VRMS input f = 1kHz, 2.5VRMS input f = 1kHz, 0.5VRMS, gain = 0dB 1.5 5.5 SNR THD f = 1.0kHz, 1VRMS, gain = 0dB, 20Hz to 20kHz RLOAD = 10k f = 1.0kHz, 0.5VRMS f = 1.0kHz, 2VRMS SYMBOL Gain = 0dB Inferred through total harmonic distortion specification, f = 1kHz CONDITIONS MIN TYP V_AUD/2 2 100 V_AUD/2 105 0.002 0.005 0.5 2 6 110 105 6.7 105 2.5 6.5 dB dB VP-P dB MAX UNITS V VRMS k V dB %
Volume Attenuation Step
dB
4
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Audio/Video Switch for Three SCART Connectors
ELECTRICAL CHARACTERISTICS (continued)
(VV12 = 12V, VV_VID = 5V, VV_DIG = 5V, 0.47F X5R capacitor in parallel with a 10F aluminum electrolytic capacitor from V_AUD to G_AUD, no load, TA = 0C to +70C, unless otherwise noted. Typical values are at TA = +25C.) (Note 1)
PARAMETER Minimum Receive SCL/SDA Rise Time (Note 3) Maximum Receive SCL/SDA Fall Time (Note 3) Minimum Receive SCL/SDA Fall Time (Note 3) Setup Time for Stop Condition Bus Free Time Between a Stop and Start OTHER DIGITAL PINS DEV_ADDR Low Level DEV_ADDR High Level INTERRUPT_OUT Low Voltage INTERRUPT_OUT High Leakage Current SLOW SWITCHING Input Low Level Input Medium Level Input High Level Input Current Output Low Level Output Medium Level (External 16/9) Output High Level (External 4/3) FAST SWITCHING Input Low Level Input High Level Input Current Output Low Level Output High Level Fast-Switching Output to RGB Skew Fast-Switching Output Rise Time Fast-Switching Output Fall Time ISINK = 0.5mA V_VID - VOH, ISOURCE = 20mA Difference in propagation delays of fastswitching signal and RGB signals; measured from 50% input transition to 50% output transition RLOAD = 150 to ground RLOAD = 150 to ground 0 0 1 1 0.01 0.75 0.4 3 10 0.2 2 V V A V V RLOAD = 10k to ground RLOAD = 10k to ground RLOAD = 10k to ground 0 5.0 10 0 4.5 9.5 50 2 7.0 12.0 100 1.5 6.5 12 V V V A V V V INTERRUPT_OUT sinking 1mA VINTERRUPT_OUT = 5V 2.6 0.15 1 0.4 10 0.8 V V V A SYMBOL tR tF tF tSU,STO tBUF 0.6 1.3 CONDITIONS MIN TYP 20 + 0.1CB 300 20 + 0.1CB MAX UNITS ns ns ns s s
MAX4399
30
ns
30 30
ns ns
Note 1: All devices are 100% tested at TA = +25C. All temperature limits are guaranteed by design. Note 2: Parameter guaranteed by design. Note 3: CB = total capacitance of one bus line in pF. Tested with CB = 400pF.
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5
Audio/Video Switch for Three SCART Connectors MAX4399
Typical Operating Characteristics
(VV12 = 12V, VV_VID = 5V, VV_DIG = 5V, 0.47F ceramic X5R capacitor in parallel with a 10F aluminum electrolytic capacitor from V_AUD to G_AUD, no load, TA = +25C, unless otherwise noted.)
RGB VIDEO LARGE-SIGNAL BANDWIDTH vs. FREQUENCY
MAX4399 toc01
Y VIDEO LARGE-SIGNAL BANDWIDTH vs. FREQUENCY
MAX4399 toc02
RGB VIDEO SMALL-SIGNAL BANDWIDTH vs. FREQUENCY
3 2 1 GAIN (dB) 0 -1 -2 -3 -4 -5 -6 VIN = 100mVP-P RL = 150 to G_VID
MAX4399 toc03
4 3 2 1 GAIN (dB) 0 -1 -2 -3 -4 -5 -6
4 3 2 1 GAIN (dB) 0 -1 -2 -3 -4 -5 -6
VIN = 1VP-P RL = 150 to G_VID
VIN = 1VP-P RL = 150 to G_VID
4
0.1
1
10
100
0.1
1
10
100
0.1
1
10 FREQUENCY (MHz)
100
1000
FREQUENCY (MHz)
FREQUENCY (MHz)
Y VIDEO SMALL-SIGNAL BANDWIDTH vs. FREQUENCY
MAX4399 toc04
VIDEO CROSSTALK vs. FREQUENCY
DIFFERENTIAL GAIN (%)
MAX4399 toc05
RF_CVBS_OUT (WITH TRAP FILTER)
0.1 0 -0.1 -0.2 1 0.2 0.1 0 -0.1 -0.2 1 2 3 4 5 6 7 2 3 4 5 6 7 RL = 150 to G_VID
MAX4399 toc06
4 3 2 1 GAIN (dB) 0 -1 -2 -3 -4 -5 -6
0 -10 -20 CROSSTALK (dB) -30 -40 -50 -60 -70 -80 -90 -100 VIN = 100mVP-P RL = 150 to G_VID
VIN = 100mVP-P RL = 150 to G_VID
0.2
DIFFERENTIAL PHASE (deg)
RL = 150 to G_VID
0.1
1
10
100
0.1
1
10
100
FREQUENCY (MHz)
FREQUENCY (MHz)
RF_CVBS_OUT (WITHOUT TRAP FILTER)
DIFFERENTIAL GAIN (%) DIFFERENTIAL GAIN (%)
MAX4399 toc07
TV_Y/CVBS_OUT
0.1 0 -0.1 GAIN (dB) -0.2 1 2 3 4 5 6 7 RL = 150 to G_VID
MAX4399 toc08
AUDIO LARGE-SIGNAL BANDWIDTH vs. FREQUENCY
MAX4399 toc09
0.2 0.1 0 -0.1 -0.2 1 0.2 0.1 0 -0.1 -0.2 1
RL = 150 to G_VID
0.2
3 0 -3 -6 -9 -12 -15 -18 VIN = 0.5VRMS RL = 10k to G_AUD 0.1 1 10 FREQUENCY (kHz) 100
2
3
4
5
6
7
DIFFERENTIAL PHASE (deg)
DIFFERENTIAL PHASE (deg)
RL = 150 to G_VID
2
3
4
5
6
7
0.5 RL = 150 to G_VID 0.3 0.1 -0.1 -0.3 -0.5 1 2 3
4
5
6
7
1000
6
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Audio/Video Switch for Three SCART Connectors
Typical Operating Characteristics (continued)
(VV12 = 12V, VV_VID = 5V, VV_DIG = 5V, 0.47F ceramic X5R capacitor in parallel with a 10F aluminum electrolytic capacitor from V_AUD to G_AUD, no load, TA = +25C, unless otherwise noted.)
AUDIO CROSSTALK vs. FREQUENCY
MAX4399 toc10
MAX4399
AUDIO THD+N vs. FREQUENCY
MAX4399 toc11
V_VID QUIESCENT SUPPLY CURRENT vs. TEMPERATURE
V_VID QUIESCENT SUPPLY CURRENT (mA) 58 56 54 52 50 48 46 44 42 40 0 25 50 75 ALL VIDEO OUTPUT AMPLIFIERS ENABLED
MAX4399 toc12
0 -10 -20 -30 CROSSTALK (dB) -40 -50 -60 -70 -80 -90 -100 -110 -120 0.01 0.1 1 FREQUENCY (kHz) 10 RL = 10k to G_AUD
1
60
RL = 10k to G_AUD
0.1 THD+N (%) V = 1.5VRMS 0.01 V = 1.0VRMS
V = 0.5VRMS 0.001 V = 0.5VRMS 100 0.0001 0.01 0.1 1 FREQUENCY (kHz) 10 100
TEMPERATURE (C)
V_VID STANDBY QUIESCENT SUPPLY CURRENT vs. TEMPERATURE
MAX4399 toc13
V_DIG QUIESCENT SUPPLY CURRENT vs. TEMPERATURE
1.8 V_DIG SUPPLY CURRENT (mA) 1.6 1.4 1.2 1.0 0.8 0.6 0.4 0.2
MAX4399 toc14
V12 QUIESCENT SUPPLY CURRENT vs. TEMPERATURE
MAX4399 toc15
30 V_VID STANDBY SUPPLY CURRENT (mA) 25 20 15 10 5 0 0
2.0
ALL VIDEO OUTPUT AMPLIFIERS DISABLED
30 25 20 15 10 5 0
0 25 50 75 0 25 50 75 TEMPERATURE (C) TEMPERATURE (C)
V12 SUPPLY CURRENT (mA)
0
25
50
75
TEMPERATURE (C)
V_AUD vs. TEMPERATURE
MAX4399 toc16
INPUT CLAMP AND BIAS LEVEL vs. TEMPERATURE
MAX4399 toc17
INPUT CLAMP CURRENT vs. TEMPERATURE
5.5 INPUT CLAMP CURRENT (A) 5.0 4.5 4.0 3.5 3.0 2.5 2.0 1.5 1.0 VIN = 1.75V
MAX4399 toc18
10.0 9.5 9.0 V_AUD (V) 8.5 8.0 7.5 7.0 6.5 6.0 0 25 50
2.5 INPUT CLAMP AND BIAS LEVEL (V) 2.3 2.1 1.9 1.7 1.5 1.3 1.1 0.9 0.7 0.5 BOTTOM-LEVEL CLAMP BIAS
6.0
75
0
25
50
75
0
25
50
75
TEMPERATURE (C)
TEMPERATURE (C)
TEMPERATURE (C)
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Audio/Video Switch for Three SCART Connectors MAX4399
Typical Operating Characteristics (continued)
(VV12 = 12V, VV_VID = 5V, VV_DIG = 5V, 0.47F ceramic X5R capacitor in parallel with a 10F aluminum electrolytic capacitor from V_AUD to G_AUD, no load, TA = +25C, unless otherwise noted.)
INPUT CLAMP CURRENT vs. INPUT VOLTAGE
MAX4399 toc19
OUTPUT BIAS VOLTAGE vs. TEMPERATURE
CHROMA
MAX4399 toc20
0.5 0.4 INPUT CLAMP CURRENT (mA) 0.3 0.2 0.1 0 -0.1 -0.2 -0.3 -0.4 -0.5 0 1 2 3 4 5 INPUT VOLTAGE (V)
2.5
OUTPUT BIAS VOLTAGE (V)
2.0
1.5 RGB, LUMA, CVBS 1.0
0.5
0 0 25 50 75 TEMPERATURE (C)
Pin Description
PIN 1 2 3 4 5 6 7 8 9 10 NAME V_DIG DEV_ADDR SDA SCL INTERRUPT_OUT G_DIG ENC_L_IN ST_AUX_IN ENC_R_IN AUD_BIAS Digital Supply Voltage. Connect to 5V. Device Address Set Input. Connect to G_DIG to set write and read addresses of 94h and 95h, respectively. Connect to V_DIG to set write and read addresses of 96h and 97h, respectively. Bidirectional Data I/O. I2C-compatible, 2-wire interface data input/output. Output is open drain. Clock Input. I2C-compatible, 2-wire interface clock. Interrupt Output. INTERRUPT_OUT is an open-drain output that goes high impedance to indicate a change in the slow switch lines, AUX_SS, TV_SS, or VCR_SS. Digital Ground Digital Encoder Left-Channel Audio Input Satellite Dish Tone Input Digital Encoder Right-Channel Audio Input Audio Input Bias Voltage. Bypass AUD_BIAS with a 10F capacitor and a 0.1F capacitor to G_AUD. Audio Supply Voltage. Connect all V_AUD together. An on-board linear regulator creates the +8V audio supply voltage from V12. Bypass pin 30 with a 10F aluminum electrolytic capacitor in parallel with a 0.47F low-ESR ceramic capacitor to audio ground, and bypass pins 11 and 22 with 0.1F capacitors to audio ground. AUX SCART Left-Channel Audio Input AUX SCART Right-Channel Audio Input VCR SCART Right-Channel Audio Input VCR SCART Left-Channel Audio Input TV SCART Right-Channel Audio Input FUNCTION
11, 22, 30
V_AUD
12 13 14 15 16
AUX_L_IN AUX_R_IN VCR_R_IN VCR_L_IN TV_R_IN
8
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Audio/Video Switch for Three SCART Connectors
Pin Description (continued)
PIN 17 18, 26 19 20 21 23 24 25 27 28 29 31 32 33 34 NAME TV_L_IN G_AUD AUX_L_OUT AUX_R_OUT VCR_R_OUT VCR_L_OUT PHONO_R_OUT PHONO_L_OUT RF_MONO_OUT TV_L_OUT TV_R_OUT V12 AUX_SS TV_SS VCR_SS TV SCART Left-Channel Audio Input Audio Ground AUX SCART Left-Channel Audio Output AUX SCART Right-Channel Audio Output VCR SCART Right-Channel Audio Output VCR SCART Left-Channel Audio Output Hi-Fi Right-Channel Audio Output Hi-Fi Left-Channel Audio Output RF Modulator Mono Audio Output TV SCART Left-Channel Audio Output TV SCART Right-Channel Audio Output +12V Supply. Bypass V12 with a 10F capacitor in parallel with a 0.1F capacitor to ground. AUX SCART Bidirectional Slow-Switch Signal TV SCART Bidirectional Slow-Switch Signal VCR SCART Bidirectional Slow-Switch Signal Trap Filter. Connect a series RLC trap filter to eliminate the color subcarrier frequency (4.43MHz) from the luma signal. The filter prevents cross-mixing of the color subcarriers when the luma and chroma signals are added together to form a composite signal. Internally biased at +0.5V. Video Ground TV SCART Fast-Switching Output. This signal is used to switch the TV to its RGB inputs for onscreen display purposes. Video Supply. Bypass each V_VID with a 0.01F capacitor to V_GND. Connect a 200nH ferrite bead from V_VID to a 5V supply. RF Modulator Composite Video Output. Internally biased at 1.0V. TV SCART Luma/Composite Video Output. Internally biased at 1.0V. TV SCART Red/Chroma Video Output. Internally biased at 1.0V for red video signal and 2.1V for chroma video signal. TV SCART Green Video Output. Internally biased at 1.0V. TV SCART Blue Video Output. Internally biased at 1.0V. AUX SCART Red/Chroma Video Output. Internally biased at 1.0V for red video signal and 2.1V for chroma video signal. AUX SCART Luma/Composite Video Output. Internally biased at 1.0V. VCR SCART Luma/Composite Video Output. Internally biased at 1.0V. VCR SCART Red/Chroma Video Output. Internally biased at 1.0V for red video signal and 2.1V for chroma video signal. Video Bias Voltage Output. VID_BIAS sets video bias level for chroma signals. Bypass VID_BIAS with a low-ESR 0.1F capacitor to G_VID. TV SCART Red/Chroma Video Input. Internally biased at 1.22V for red, or 1.8V for chroma. FUNCTION
MAX4399
35
TRAP
36, 42, 50 37 38, 46, 61 39 40 41 43 44 45 47 48 49 51 52
G_VID TV_FS_OUT V_VID RF_CVBS_OUT TV_Y/CVBS_OUT TV_R/C_OUT TV_G_OUT TV_B_OUT AUX_R/C_OUT AUX_Y/CVBS_OUT VCR_Y/CVBS_OUT VCR_R/C_OUT VID_BIAS TV_R/C_IN
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9
Audio/Video Switch for Three SCART Connectors MAX4399
Pin Description (continued)
PIN 53 54 55 56 57 58 59 60 62 63 64 65 66 67 68 NAME TV_Y/CVBS_IN AUX_R/C_IN AUX_Y/CVBS_IN VCR_Y/CVBS_IN VCR_FS_IN VCR_R/C_IN VCR_G_IN VCR_B_IN ENC_Y/CVBS_IN ENC_R/C_IN ENC_G_IN ENC_B_IN ENC_Y_IN ENC_C_IN ENC_FS_IN FUNCTION TV SCART Luma/Composite Video Input. Internally biased at 1.22V. AUX SCART Red/Chroma Video Input. Internally biased at 1.22V for red, or 1.8V for chroma. AUX SCART Luma/Composite Video. Internally biased at 1.22V. VCR SCART Luma/Composite Video Input. Internally biased at 1.22V. VCR SCART Fast-Switching Input VCR SCART Red/Chroma Video Input. Internally biased at 1.22V for red, or 1.8V for chroma. VCR SCART Green Video Input. Internally biased at 1.22V. VCR SCART Blue Video Input. Internally biased at 1.22V. Digital Encoder Luma/Composite Video Input. Internally biased at 1.22V. Digital Encoder Red/Chroma Video Input. Internally biased at 1.22V for red, or 1.8V for chroma. Digital Encoder Green Video Input. Internally biased at 1.22V. Digital Encoder Blue Video Input. Internally biased at 1.22V. Digital Encoder Luma Video Input. Internally biased at 1.22V. Digital Encoder Chroma Video Input. Internally biased at 1.8V. Digital Encoder Fast-Switching Input
Detailed Description
The MAX4399 audio/video switch matrix connects audio and video signals between different ports. In the case of a set-top box, the ports consist of the MPEG decoder and three SCART connectors. For DVD+RW recorders and some televisions, the ports consist of the main board, front panel, tuner, and two SCART connectors. The video section consists of input buffers, a crosspoint switch, and output drivers that can be disabled. There is also a mixer, which creates a composite video signal from S-video. The video inputs can be set in either clamp or bias mode. The red/chroma outputs have pulldowns that connect the outputs to video ground as described in the Video Inputs section. The audio section features input buffers, a crosspoint switch, and output drivers. The TV audio path has volume control from -56dB to +6dB in 2dB steps. The VCR and AUX audio paths have volume control from -6dB to +6dB in 6dB steps. The MAX4399 can be configured to switch inputs during a zero crossing to reduce clicks. The MAX4399 can also switch volume levels during a zero crossing to reduce zipper noise. The audio outputs can operate in different modes. For instance, left and right audio channels can be swapped (see the Audio Outputs section).
The MAX4399 has two fast-switching inputs and one fast-switching output. Fast switching is used for creating on-screen displays by switching between the CVBS and RGB signals. Under I2C-compatible control, the fast-switching output can follow either of the fastswitching inputs or be set high or low. The MAX4399 features three slow-switching input/outputs to support slow switching, which sets the screen aspect ratio or video source of the display device. The slow switching relies on tri-level logic in which the levels are 0V, 6V, and 12V. The status of the slow-switching input is continuously read and stored in register 0Eh. If INTERRUPT_OUT is enabled, then INTERRUPT_OUT changes to a high-impedance state if any of the slowswitching inputs change logic levels. The slow-switching outputs can be set to a logic level or high impedance by writing to registers 07h, 09h, or 0Bh. The MAX4399 can be configured through an I2C-compatible interface. DEV_ADDR sets the I2C-compatible address.
SCART Video Switching
The MAX4399 triple SCART audio/video switch includes multiplexed video amplifiers and a Y-C mixerdriver with a trap filter to drive an RF modulator. The MAX4399 switches video from an MPEG decoder output and TV, VCR, and AUX SCART connectors.
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Audio/Video Switch for Three SCART Connectors MAX4399
MAX4399
VGA 5dB, 6dB, 7dB TV_R/C_OUT
0.1F
0.1F
MAX4399
VGA 5dB, 6dB, 7dB TV_R/C_OUT
75
PIN 15
PIN 15
75
PULLDOWN
N PIN 13 SCART CABLE PIN 13
N
PULLDOWN
TV_R/C_IN
CLAMP/BIAS SCART CONNECTORS
CLAMP/BIAS
TV_R/C_IN
VIDEO INPUT
CLAMP
CLAMP
VIDEO INPUT
Figure 1. Bidirectional SCART Pins
The inputs and outputs are grouped by SCART connectors: TV, VCR, and AUX. While the SCART connector supports RGB, S-video, and composite formats, RGB and S-video share a bidirectional set of SCART connector pins. The MAX4399 supports connection of auxiliary devices (DVD players, DVD+R/W recorders, game consoles, camcorders, etc.) by including full I/O support for an auxiliary (AUX) SCART connector.
Video Inputs
All of the video amplifier inputs are AC-coupled with an external 0.1F capacitor. Either a clamp or bias circuit sets the DC input level of the video signals. The clamp circuit positions the sync tip of the CVBS, RGB, or luma (S-VHS) signals. If the signal does not have sync, then the clamp positions the minimum of the signal at the clamp voltage. The bias circuit positions the chroma signal (S-VHS) at its midlevel. On the video inputs that can receive either a chroma or a red video signal, the 2-wire interface sets whether the clamp or bias circuit is active. Red/chroma signals, such as TV_R/C_OUT signals are bidirectional. When the red/chroma signal is being used as an input, then the red/chroma output must connect the 75 back-termination resistor to ground, as shown in Figure 1, so the transmitting device can see the proper termination on the receiving side. The
MAX4399 provides an active pulldown to G_VID on all red/chroma outputs (AUX_R/C_OUT, TV_R/C_OUT, and VCR_R/C_OUT). The MPEG decoder and VCR uses the RGB format to insert an on-screen display (OSD), usually text, onto the TV. A fast-switching signal controls whether the RGB signals or composite video signal appear on the TV. The MAX4399 supports RGB as an input from either the VCR or the MPEG decoder and as an output only to the TV. The red video signal of the RGB format and the chroma video signal of the S-VHS format share the same SCART connector pin; therefore RGB signals and S-VHS signals cannot be present at the same time. Loop-through is possible with a composite video signal but not with RGB signals because the RGB SCART pins are used for both input and output. The VCR, MPEG decoder, auxiliary device, and TV use the S-VHS format, which is the high-quality format for the home today. The MAX4399 supports S-VHS as an input from the VCR, MPEG decoder, auxiliary device, and TV, and as a separately switchable output to the TV, VCR, and AUX SCART connectors. Because S-VHS support was not included in the original specification of the SCART connector, the Y signal of S-VHS and the CVBS signal share the same SCART connector pins. If S-VHS is present, then a composite signal must be created
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Audio/Video Switch for Three SCART Connectors
from the Y and C signals to drive the legacy RF_CVBS_OUT output. The circuit is shown as a summing point with bias in Figure 2. The MAX4399 sums Y and C to get CVBS, and the bias provides the DC levels for offsetting the chroma signal. Again, loop-through is not possible with S-VHS because the chroma SCART pin is used for both input and output. The MAX4399 supports the CVBS format, with inputs from the VCR, MPEG decoder, TV, and auxiliary device. Full loop-through is possible to all devices except the MPEG decoder because the SCART connector has separate input and output pins for the CVBS format.
MAX4399
Table 1. Slow Switch Modes
SLOW-SWITCHING SIGNAL VOLTAGE (V) 0 to 2 MODE Display device uses an internal source such as a built-in tuner to provide a video signal Display device uses a video signal from the SCART connector and sets the display to 16:9 aspect ratio Display device uses a signal from a SCART connector and sets the display to 4:3 aspect ratio
4.5 to 7
Slow Switching
The MAX4399 supports the tri-level slow switching of IEC 933-1, Amendment 1, which selects the aspect ratio for the display device. Under I2C-compatible control, the MAX4399 sets the slow-switching output levels. Table 1 shows the valid output levels of the slow-switching signal and the corresponding operating modes of the display device. The slow-switching SCART pins are bidirectional. The MAX4399 can set the slow-switch output drivers to highimpedance mode to receive signals. When enabled, INTERRUPT_OUT becomes high impedance if the voltage level changes on TV_SS, VCR_SS, or AUX_SS. The VCR or MPEG decoder outputs a fast-switching signal to the display device. The fast-switching signal can also be set to a constant high or low through the 2wire interface. The pass-through delay from VCR to TV or MPEG decoder to TV matches that of the RGB signals facilitating proper OSD insertion.
9.5 to 12.6
SCART Audio Switching
Audio Inputs
The audio block has four stereo audio inputs from the TV, VCR, and AUX SCART connectors, plus the MPEG decoder. Additionally, the MAX4399 provides a satellite tone input. Each input has a 100k resistor connected to an internally generated voltage equal to 0.5 x V_AUD. There are three main sections--the TV channel, the VCR channel, and the AUX channel.
Audio Outputs
Each channel has a stereo output and the TV channel has an additional phono output and a mono output. The phono outputs always follow the TV audio input selection. The mono output, a mix of the TV right and left channels, drives the channel 3/4 RF modulator. The three stereo outputs can be configured to normal mode, swap mode, mono, both channels to right input, and both channels to left input. The latter two modes are useful if the left audio channel carries one language and the right audio channel carries another language. The phono output is ideal for connection to a hi-fi, and carries the same signals as the TV output when switched to normal mode. The mono mixer, a resistor summer, attenuates the amplitude of each of the two signals by 6dB. The 3dB gain block, which follows the mono mixer (Figures 3 and 4), is a compromise between a 0dB gain block and a 6dB gain block. If the left and right audio channels were completely uncorrelated, then a 6dB gain block could be used. If the left and right channels were completely correlated, then a 0dB block would have to be used. In reality, most stereo audio channels are partially correlated and hence a 3dB gain block was used.
Video Outputs
The DC level at the video outputs is controlled so coupling capacitors are not required, and all of the video outputs are capable of driving a 150, back-terminated coax load directly with respect to ground. Since some televisions and VCRs use the horizontal sync height for automatic gain control, the MAX4399 accurately reproduces the sync height to within 2%.
Y/C Mixer and Trap Filter
The MAX4399 includes an on-chip mixer to produce CVBS from Y and C. The Y signal input to the mixer has an external trap filter connection, TRAP, to eliminate the color subcarrier frequency (4.43MHz), preventing cross-mixing of the subcarriers in the mixer. TRAP is internally biased at 0.5V. Connect a series RLC filter to G_VID, or leave TRAP unconnected if not used.
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Audio/Video Switch for Three SCART Connectors MAX4399
TV_R/C_IN TV_Y/CVBS_IN AUX_Y/CVBS_IN AUX_R/C_IN VCR_B_IN VCR_G_IN VCR_R/C_IN VCR_FS_IN 0.7V 6dB VCR_Y/CVBS_IN ENC_Y/CVBS_IN ENC_R/C_IN ENC_G_IN ENC_B_IN ENC_Y_IN ENC_FS_IN 0.7V ENC_C_IN BIAS BIAS PULLDOWN TV_R/C_OUT VGA 5dB, 6dB, OR 7dB TV_G_OUT VGA 5dB, 6dB, OR 7dB TV_B_OUT N CLAMP CLAMP CLAMP/BIAS CLAMP CLAMP CLAMP VGA 5dB, 6dB, OR 7dB TV_R/C_OUT 6dB PULLDOWN AUX_R/C_OUT N AUX_R/C_OUT AUX_Y/CVBS_OUT CLAMP/BIAS CLAMP CLAMP CLAMP/BIAS CLAMP 6dB CLAMP CLAMP/BIAS PULLDOWN VCR_R/C_OUT N VCR_R/C_OUT 6dB VCR_Y/CVBS_OUT
6dB
TV_Y/CVBS_OUT
0V TV_FS_OUT
MAX4399
5V
2k MIXER 2k RF_CVBS_OUT
6dB
TRAP
Figure 2. MAX4399 Video Section Functional Diagram ______________________________________________________________________________________ 13
Audio/Video Switch for Three SCART Connectors MAX4399
ZCD
ENC_LB STEN_LB
VCR_LB
AUX_LB
TV_LB
TO AUDIO BLOCK 2 MUTE 0dB ZCD VOLUME BYPASS SWITCHES PHONO_L_OUT
VCR_L_IN
0dB MUTE
TV_L_IN
0dB
VOLUME CONTROL +6dB TO -56dB 2dB STEPS
AUX_L_IN
0dB
0dB TV MONO SWITCHES
ENC_L_IN
0dB
INPUT SOURCE SWITCHES
0dB
TV_L_OUT
MUTE
MUTE
6dB
3dB
0dB
RF_MONO_OUT
ST_AUX_IN
0dB
VAUD/2
VAUD/2 TV MONO SWITCHES MUTE
6dB
0dB
TV_R_OUT
MAX4399
ENC_R_IN 0dB
AUX_R_IN
0dB VOLUME CONTROL +6dB TO -56dB 2dB STEPS
0dB VOLUME BYPASS SWITCHES 0dB PHONO_R_OUT
TV_R_IN
0dB
VCR_R_IN
0dB
MUTE INPUT SOURCE SWITCHES
ZCD MUTE
STEN_RB
VCR_RB
AUX_RB
ENC_RB
TV_RB
TO AUDIO BLOCK 2
Figure 3. MAX4399 Audio Functional Diagram (AUDIO BLOCK 1) 14 ______________________________________________________________________________________
Audio/Video Switch for Three SCART Connectors MAX4399
MUTE VCR_LB TV_LB AUX_LB ENC_LB STEN_LB INPUT SOURCE SWITCHES
-6dB, 0dB, 6dB VOLUME CONTROL
VCR MONO SWITCHES 0dB 0dB VCR_L_OUT
VAUD/2 FROM BUFFER OUTPUTS ON AUDIO BLOCK 1 VAUD/2
3dB
INPUT SOURCE SWITCHES STEN_RB ENC_RB AUX_RB TV_RB VCR_RB MUTE -6dB, 0dB, 6dB VOLUME CONTROL 0dB
VCR MONO SWITCHES
0dB
VCR_R_OUT
MUTE VCR_LB TV_LB AUX_LB ENC_LB STEN_LB INPUT SOURCE SWITCHES VAUD/2 FROM BUFFER OUTPUTS ON AUDIO BLOCK 1 VAUD/2 AUX MONO SWITCHES 3dB -6dB, 0dB, 6dB VOLUME CONTROL AUX MONO SWITCHES 0dB 0dB AUX_L_OUT
INPUT SOURCE SWITCHES STEN_RB ENC_RB AUX_RB TV_RB VCR_RB MUTE -6dB, 0dB, 6dB VOLUME CONTROL 0dB
0dB
AUX_R_OUT
MAX4399
Figure 4. Audio Functional Diagram (AUDIO BLOCK2) ______________________________________________________________________________________ 15
Audio/Video Switch for Three SCART Connectors MAX4399
SDA tSU, DAT tLOW SCL tHD, STA tR START CONDITION tHIGH tF REPEATED START CONDITION STOP CONDITION START CONDITION tHD, DAT tSU, STA tHD, STA tSU, STO tBUF
Figure 5. Timing Diagram for SDA and SCL Signals
Zero-Cross (Clickless) Switching
The TV channel incorporates a zero-crossing detect (ZCD) circuit that minimizes click noise due to abrupt signal level changes that occur when switching between audio signals at an arbitrary moment in time. To implement the zero-cross function when switching audio signals, set the ZCD bit by loading register 00h through the I2C-compatible interface (if the ZCD bit is not already set). Then set the mute bit high by loading register 00h. Next, wait for a period of time long enough for the audio signal to cross zero. This period is a function of the audio signal path's low frequency 3dB corner (f L3dB ). For example, if f L3dB = 20Hz, the time period to wait for zero cross is 1/20Hz or 50ms. Next, set the appropriate TV switches using register 01h. Finally, clear the mute bit (while leaving the ZCD bit high) using register 00h. The MAX4399 switches the signal out of mute at the next zero crossing. To implement the zero-cross function for TV volume changes, or for TV and phono volume bypass switching, simply ensure the ZCD bit in register 00h is set.
Digital Section
Serial Interface
The MAX4399 uses a simple 2-wire serial interface requiring only two I/O lines (2-wire bus) of a standard microprocessor (P) port. The fast-mode I2C-compatible serial interface allows communication at data rates up to 400kbps. Figure 5 shows the timing diagram for signals on the 2-wire bus. The two bus lines (SDA and SCL) must be high when the bus is not in use. The MAX4399 is a slave device and must be controlled by a bus master device. Figure 6 shows a typical application where multiple devices can be connected to the bus provided they have different address settings. External pullup resistors are not necessary on these lines (when driven by push-pull drivers), though the MAX4399 can be used in applications where pullup resistors are required to maintain compatibility with existing circuitry. The serial interface operates at SCL rates up to 400kHz. The SDA state is allowed to change only while SCL is low, with the exception of START and STOP conditions as shown in Figure 7. SDA's state is sampled, and therefore must remain stable while SCL is high. Data is transmitted in 8-bit bytes. Nine clock cycles are required to transfer each byte to the MAX4399. Release SDA during the 9th clock cycle as the selected device acknowledges the receipt of the byte, by pulling SDA low during this time. A series resistor on the SDA line may be needed if the master's output is forced high while the selected device acknowledges (Figure 6).
Volume Control
The TV channel volume control ranges from -56dB to +6dB in 2dB increments. The VCR and AUX volume control settings are programmable for -6dB, 0dB, and +6dB. With the ZCD bit set, the TV volume control switches only at zero crossings, thus minimizing click noise. The TV outputs can bypass the volume control. While the phono outputs always follow the TV audio input selection, the phono outputs can either be processed through the TV volume control or they can bypass the TV volume control.
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Audio/Video Switch for Three SCART Connectors MAX4399
VDD C SDA SCL SCL RS* MAX4399 SDA SCL V_DIG MAX4399 SCL VDD SDA V_DIG C SDA SCL VDD
OTHER DEVICE #1 SDA SCL VDD
OTHER DEVICE #1 SCL VDD SDA
OTHER DEVICE #2 SDA RS* IS OPTIONAL. SCL VDD
OTHER DEVICE #2 SDA
Figure 6. Multiple Devices Controlled by a 2-Wire Interface
Figure 8. A Typical I2C Interface Application
SDA
Digital Inputs and Interface Logic
SCL START CONDITION STOP CONDITION
Figure 7. Start and Stop Conditions on a 2-Wire Interface
The I2C-compatible, 2-wire interface has logic levels defined as VOL = 0.8V and VOH = 2.0V. All of the inputs include Schmitt-trigger buffers to accept slow-transition interfaces. The digital inputs are compatible with 3V CMOS logic levels.
I2C Compatibility
The MAX4399 is compatible with existing I2C systems. SCL and SDA are high-impedance inputs. SDA has an open drain that pulls the data line low during the 9th clock pulse. Figure 8 shows a typical I 2C interface application. The communication protocol supports the standard I2C 8-bit communications. The general call address is ignored, and CBUS formats are not supported. The MAX4399 address is compatible with the 7-bit I2C addressing protocol only. No 10-bit formats are supported. RESTART protocol is supported, but an immediate STOP condition is necessary to update the MAX4399.
INTERRUPT_OUT Signal
INTERRUPT_OUT is an open-drain output that becomes high impedance when a change in any of the slow-switch signals occurs. Clear INTERRUPT_OUT by setting bit 3 of register 04h low.
Data Format of the 2-Wire Interface
Write mode
S Slave Address A Register Address A Data A P
Read mode
S Slave Address A Register Address A Data A P
Where S = Start Condition, A = Acknowledge, P = Stop Condition.
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Audio/Video Switch for Three SCART Connectors MAX4399
2-Wire Interface Slave Address Programming
Connect DEV_ADDR to G_DIG or V_DIG to set the MAX4399 write and read addresses as shown in Table 2.
Table 2. Slave Address Programming
DEV_ADDR CONNECTION G_DIG V_DIG WRITE ADDRESS 94h 96h READ ADDRESS 95h 97h
Data Register Writing and Reading
Program the SCART video and audio switches by writing to registers 00h through 0Dh (Tables 3 through 18). Registers 00h through 0Dh can also be read, allowing read-back of data after programming and facilitating system debugging. The status register is read-only and can be read from address 0Eh (Table 19).
Applications Information
Filtering of Encoder Outputs
The DAC outputs of encoder chips need to be processed through a lowpass filter (reconstruction filter) to attenuate out-of-band noise. Figure 9 shows how the MAX7440 provides an integrated, convenient solution for reconstruction filtering.
Table 3. Write Mode Input Data Format
REGISTER ADDRESS 00h 01h 02h 03h 04h 05h 06h 07h 08h 09h 0Ah 0Bh POR VALUE 47h 07h 07h 07h 01h 00h 1Fh 20h 07h 00h 07h 00h BIT 7 Not used BIT 6 ZCD BIT 5 BIT 4 BIT 3 Volume control TV mono switch VCR mono switch AUX mono switch Not used Not used Not used Not used Interrupt enable Not used BIT 2 BIT 1 BIT 0 TV audio mute TV audio selection VCR audio selection AUX audio selection Phono TV volume volume Not used bypass bypass Not used Not used Not used
Not used Not used VCR volume control AUX volume control Not used ENC_R/C_IN Clamp TV_R/C_IN clamp Not used VCR_R/C_IN clamp Not used AUX_R/C_IN clamp Not used Not used Not used
RGB gain RF_CVBS_OUT TV_Y/CVBS_ switch OUT switch Not used Not used Not used Not used Not used Not used Not used Not used
TV G and B video switch TV fast switch Not used Not used Not used Not used Not used Not used Not used Not used
TV video switch TV_R/C_OUT ground Set TV slow switch
VCR video switch VCR_R/C_ OUT ground Set VCR slow switch
AUX video switch AUX_R/C_ OUT ground Set AUX slow switch
0Ch
00h
Not used AUX_Y/CVBS_ OUT enable
0Dh
00h
VCR_Y/ VCR_R/ CVBS_ C_OUT Not used Not used Not used Not used Not used OUT enable enable TV_FB_ RF_CVBS_ AUX_R/C_OUT TV_R/C_OUT TV_G_OUT TV_B_OUT TV_Y/CVBS_ OUT OUT enable enable enable enable OUT enable enable enable
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Audio/Video Switch for Three SCART Connectors MAX4399
+5V +5V
0.1F MPEG DECODER
1F
V_VID
MAX7440
0.1F CVBS D/A IN1 LOWPASS FILTER A = +1V/V OUT1 ENC_Y/CVBS_IN CLAMP
MAX4399
0.1F Y D/A IN2 LOWPASS FILTER A = +1V/V OUT2 ENC_Y_IN CLAMP
0.1F C D/A IN3 LOWPASS FILTER A = +1V/V OUT3 ENC_C_IN BIAS
0.1F R D/A IN4 LOWPASS FILTER A = +1V/V OUT4 ENC_R/C_IN CLAMP
0.1F G D/A IN5 LOWPASS FILTER A = +1V/V OUT5 ENC_G_IN CLAMP
0.1F B D/A IN6 LOWPASS FILTER A = +1V/V OUT6 ENC_B_IN CLAMP
G_VID
Figure 9. MPEG Decoder Outputs Filtered by the MAX7440 Before Being Passed to the MAX4399
Hot-Plug of SCART Connectors--Floating Chassis Discharge
The MAX4399 features high-ESD protection on all SCART inputs and outputs, and requires no external transient voltage suppressor (TVS) devices to protect against floating chassis discharge. Some set-top boxes have a floating chassis problem in which the chassis is not connected to earth ground. As a result, the chassis can charge up to 500V. When a SCART cable is con-
nected to the SCART connector, the charged chassis can discharge through a signal pin. The equivalent circuit is a 2200pF capacitor charged to 311V connected through less than 0.1 to a signal pin. The MAX4399 is soldered on the PC board when it experiences such a discharge. Therefore, the current spike flows through the ESD protection diodes and is absorbed by the supply bypass capacitors, which have high capacitance and low ESR.
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Audio/Video Switch for Three SCART Connectors MAX4399
VCR_Y/CVBS_IN_SC
AUX_Y/CVBS_IN_SC
ENC_Y/CVBS_IN_SC
TV_Y/CVBS_IN_SC
VCR_R/C_IN_SC
AUX_R/C_IN_SC
ENC_R/C_IN_SC
VCR_FS_IN_SC
0.01F +5V VIDEO SUPPLY
TV_R/C_IN_SC
VCR_G_IN_SC
ENC_C_IN_SC
ENC_G_IN_SC
VCR_B_IN_SC
ENC_Y_IN_SC
ENC_B_IN_SC
ENC_FS_IN
200nH
10F 68 ENC_FS_IN +5V DIGITAL SUPPLY 0.1F 1 67 ENC_C_IN 66 ENC_Y_IN 65 ENC_B_IN 64 ENC_G_IN 63 ENC_R/C_IN 62 ENC_Y/CVBS_IN 61 V_VID 60 VCR_B_IN 59 VCR_G_IN 58 VCR_R/C_IN 57 VCR_FS_IN 56 VCR-Y/CVBS_IN 55 AUX_Y/CVBS_IN 54 AUX_R/C_IN 53 TV_Y/CVBS_IN 52 TV_R/C_IN
V_DIG
VID_BIAS
51 10F
DEV_ADDR
2
DEV_ADDR
G_VID
50
SDA
3
SDA
VCR_R/C_OUT
49
VCR_R/C_OUT_SC
SCL
4
SCL
VCR_Y/CVBS_OUT
48
VCR_Y/CVBS_OUT_SC
INTERRUPT_OUT
5
INTERRUPT_OUT
AUX_Y/CVBS_OUT
47 0.01F
AUX_Y/CVBS_OUT_SC
6
G_DIG
V_VID
46
10k ENC_L_IN_SC
7
ENC_L_IN
AUX_R/C_OUT
45
AUX_R/C_OUT_SC
10k
8
ST_AUX_IN
TV_B_OUT
44
TV_B_OUT_SC
ST_AUX_IN_SC
10k
9
ENC_R_IN
ENC_R_IN_SC 10 10F 11 AUD_BIAS
MAX4399
TV_G_OUT
43
TV_G_OUT_SC
G_VID
42
V_AUD
TV_R/C_OUT
41
TV_R/C_OUT_SC
10k AUX_L_IN_SC
12
AUX_L_IN
TV_Y/CVBS_OUT
40
TV_Y/CVBS_OUT_SC
10k
13
AUX_R_IN
RF_CVBS_OUT
39 0.01F
RF_CVBS_OUT_SC
AUX_R_IN_SC
10k
14
VCR_R_IN
V_VID
38
VCR_R_IN_SC
10k
15
VCR_L_IN
TV_FS_OUT
37
TV_FS_OUT_SC
VCR_L_IN_SC
10k
16
TV_R_IN
G_VID
36
TV_R_IN_SC
PHONO_L_OUT
TV_L_IN AUX_R_OUT VCR_R_OUT AUX_L_OUT VCR_L_OUT G_AUD V_AUD
RF_MONO_OUT
10k
PHONO_R_OUT
17
TRAP TV_R_OUT TV_L_OUT AUX_SS VCR_SS V_AUD TV_SS
35
1.8k
22H
22pF
G_AUD
TV_L_IN_SC
18
19
20
21
22
23
24
25
26
27
28
29
30
V12 31
32
33
34
10F AUX_L_OUT_SC AUX_R_OUT_SC
10F VCR_R_OUT_SC
10F VCR_L_OUT_SC
10F PHONO_R_OUT_SC
10F PHONO_L_OUT_SC
10F RF_MONO_OUT_SC
10F TV_L_OUT_SC
10F TV_R_OUT_SC
10F
0.47F
10k +12V
10k
10k
AUX_SS
10F ALL CAPACITORS ARE 0.1F AND ALL RESISTORS ARE 75, UNLESS OTHERWISE NOTED.
10F
Figure 10. Floating Chassis Discharge Protection Circuit 20 ______________________________________________________________________________________
VCR_SS
TV_SS
Audio/Video Switch for Three SCART Connectors MAX4399
Read Mode: Output Data Format Table 4. Read Mode Output Data Format
REGISTER ADDRESS 0Eh BIT 7 Not used BIT 6 Power-on reset BIT 5 BIT 4 BIT 3 BIT 2 BIT 1 BIT 0
AUX slow switch status
VCR slow switch status
TV slow switch status
Write Mode: Description of Registers Table 5. Register 00h: Audio Control
DESCRIPTION TV Audio Mute BIT 7 -- -- -- -- -- -- -- -- -- -- -- -- -- 6 -- -- -- -- -- -- -- -- -- -- -- 0 1 5 -- -- 0 0 0 0 0 0 -- 1 1 -- -- 4 -- -- 0 0 0 0 0 0 -- 1 1 -- -- 3 -- -- 0 0 0 0 1 1 -- 1 1 -- -- 2 -- -- 0 0 1 1 0 0 -- 1 1 -- -- 1 -- -- 0 1 0 1 0 1 -- 0 1 -- -- 0 0 1 -- -- -- -- -- -- -- -- -- -- -- COMMENTS Off On (power-on default) +6dB gain +4dB gain +2dB gain 0dB gain (power-on default) -2dB gain -4dB gain -- -54dB gain -56dB gain Off On (power-on default)
Volume Control
Zero-Crossing Detector
To better protect the MAX4399 against excessive voltages during the cable discharge event, additional 75 resistors should be placed in series with all inputs and outputs that go to the SCART connector (Figure 10). For harsh environments needing 15kV protection, the MAX4385E and MAX4386E single and quad highspeed op amps feature the industry's first integrated 15kV ESD protection on video inputs and outputs.
audio ground with a 10F electrolytic in parallel with a 0.1F ceramic capacitor. Bypass V_DIG with a 0.1F ceramic capacitor to digital ground. Bypass each V_VID to video ground with a 0.01F ceramic capacitor. Connect V_VID in series with a 200nH ferrite bead to the +5V supply. Bypass the internally generated video bias, VID_BIAS with a 0.1F low-ESR ceramic capacitor to G_VID.
Power Supplies and Bypassing
The MAX4399 features single +5V and +12V supply operation, and requires no negative supply. The +12V supply provides voltage for SCART function switching, and provides power for the internally generated audio supply, V_AUD. Place all bypass capacitors as close as possible to the MAX4399. Bypass V12 to ground with a 10F capacitor in parallel with a 0.1F ceramic capacitor. Connect all V_AUD pins together and bypass pin 30 with a 10F electrolytic capacitor in parallel with a 0.47F low-ESR ceramic capacitor to audio ground. Bypass V_AUD pins 11 and 22 each with a 0.1F capacitor to audio ground. Bypass AUD_BIAS to
Layout and Grounding
For optimal performance, use controlled-impedance traces for video signal paths, and place input termination resistors and output back-termination resistors close to the MAX4399. Avoid running video traces parallel to high-speed data lines. The MAX4399 provides separate ground connections for video, audio, and digital supplies. For best performance use separate ground planes for each of the ground returns, and connect all three ground planes together at a single point. Refer to the MAX4399 evaluation kit for a proven circuit board layout example.
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21
Audio/Video Switch for Three SCART Connectors MAX4399
Table 6. Register 01h: TV Audio
DESCRIPTION 7 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 6 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 5 -- -- -- -- -- -- -- -- -- 0 0 0 0 1 1 1 1 BIT 4 3 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 0 0 1 1 0 0 1 1 -- 0 1 0 1 0 1 0 1 2 0 0 0 0 1 1 1 1 -- -- -- -- -- -- -- -- -- 1 0 0 1 1 0 0 1 1 -- -- -- -- -- -- -- -- -- 0 0 1 0 1 0 1 0 1 -- -- -- -- -- -- -- -- -- COMMENTS Encoder audio VCR audio AUX audio TV audio Encoder audio + tones Mute Mute Mute (power-on default) L CHANNEL R CHANNEL OUTPUT OUTPUT L R+L R R L L L L R R+L L R L R R R
Input Source for TV Audio
-- Normal (power-on default) Mono mix Swap R channel only L channel only Normal Normal Normal
TV Mono Switch Settings
22
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Audio/Video Switch for Three SCART Connectors MAX4399
Table 7. Register 02h: VCR Audio
DESCRIPTION 7 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 0 0 1 1 6 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 0 1 0 1 5 -- -- -- -- -- -- -- -- -- 0 0 0 0 1 1 1 1 -- -- -- -- BIT 4 3 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 0 0 1 1 0 0 1 1 -- -- -- -- -- 0 1 0 1 0 1 0 1 -- -- -- -- 2 0 0 0 0 1 1 1 1 -- -- -- -- -- -- -- -- -- -- -- -- -- 1 0 0 1 1 0 0 1 1 -- -- -- -- -- -- -- -- -- -- -- -- -- 0 0 1 0 1 0 1 0 1 -- -- -- -- -- -- -- -- -- -- -- -- -- COMMENTS Encoder audio VCR audio AUX audio TV audio Encoder audio + tones Mute Mute Mute (power-on default) L CHANNEL R CHANNEL OUTPUT OUTPUT L R
Input Source for VCR Audio
--
VCR Mono Switch Settings
VCR Volume Control
Normal (power-on default) R+L R+L Mono mix R L Swap R-channel R R only L-channel L L only L R Normal L R Normal L R Normal 0dB (power-on default) +6dB 0dB -6dB
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23
Audio/Video Switch for Three SCART Connectors MAX4399
Table 8. Register 03h: AUX Audio
DESCRIPTION BIT 7 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 0 0 1 1 6 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 0 1 0 1 5 -- -- -- -- -- -- -- -- -- 0 0 0 0 1 1 1 1 -- -- -- -- 4 -- -- -- -- -- -- -- -- -- 0 0 1 1 0 0 1 1 -- -- -- -- 3 -- -- -- -- -- -- -- -- -- 0 1 0 1 0 1 0 1 -- -- -- -- 2 0 0 0 0 1 1 1 1 -- -- -- -- -- -- -- -- -- -- -- -- -- 1 0 0 1 1 0 0 1 1 -- -- -- -- -- -- -- -- -- -- -- -- -- 0 0 1 0 1 0 1 0 1 -- -- -- -- -- -- -- -- -- -- -- -- -- COMMENTS Encoder audio VCR audio AUX audio TV audio Encoder audio + tones Mute Mute Mute (power-on default) L CHANNEL R CHANNEL OUTPUT OUTPUT L R
Input Source for AUX Audio
--
AUX Mono Switch Settings
AUX Volume Control
Normal (power-on default) R+L R+L Mono mix R L Swap R channel R R only L channel L L only L R Normal L R Normal L R Normal 0dB (power-on default) +6dB 0dB -6dB
24
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Audio/Video Switch for Three SCART Connectors MAX4399
Table 9. Register 04h: Volume Control Bypass
DESCRIPTION Phono Volume Bypass BIT 7 -- -- TV Volume Bypass -- -- Interrupt Enable -- -- 6 -- -- -- -- -- -- 5 -- -- -- -- -- -- 4 -- -- -- -- -- -- 3 -- -- -- -- 0 1 2 -- -- 0 1 -- -- 1 0 1 -- -- -- -- 0 -- -- -- -- -- -- COMMENTS Phono audio passes through volume control (power-on default) Phono audio bypasses volume control TV audio passes through volume control (power-on default) TV audio bypasses volume control Clear INTERRUPT_OUT (power-on default) Enable INTERRUPT_OUT
Table 10. Register 05h: Encoder Video Input Control
DESCRIPTION ENC_R/C_IN Clamp/Bias BIT 7 0 1 6 -- -- 5 -- -- 4 -- -- 3 -- -- 2 -- -- 1 -- -- 0 -- -- COMMENTS DC restore clamp active at input (power-on default) Chroma bias applied at input
Table 11. Register 06h: TV Video Input Control
DESCRIPTION 7 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 0 1 6 -- -- -- -- -- -- -- -- -- -- -- -- -- -- 0 0 1 1 -- -- 5 -- -- -- -- -- -- -- -- -- -- -- -- -- -- 0 1 0 1 -- -- BIT 4 3 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 0 0 1 1 -- -- -- -- -- -- -- -- -- 0 1 0 1 -- -- -- -- -- -- 2 -- 0 0 0 0 1 1 1 1 -- -- -- -- -- -- -- -- -- -- -- 1 -- 0 0 1 1 0 0 1 1 -- -- -- -- -- -- -- -- -- -- -- 0 -- 0 1 0 1 0 1 0 1 -- -- -- -- -- -- -- -- -- -- -- COMMENTS TV_Y/CVBS_OUT ENC_Y/CVBS_IN ENC_Y_IN VCR_Y/CVBS_IN AUX_Y/CVBS_IN TV_Y/CVBS_IN Mute Mute TV_R/C_OUT ENC_R/C_IN ENC_C_IN VCR_R/C_IN AUX_R/C_IN TV_R/C_IN Mute Mute
Input Sources for TV Video
Input Sources for TV_G_OUT and TV_B_OUT
RGB Gain
TV_R/C_IN Clamp/Bias
Mute (power-on Mute (power-on default) default) TV_G_OUT TV_B_OUT ENC_G_IN ENC_B_IN VCR_G_IN VCR_B_IN Mute Mute Mute (power-on Mute (power-on default) default) 6dB (power-on default) 7dB 5dB 5dB DC restore clamp active at input (poweron default) Chroma bias applied at input
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25
Audio/Video Switch for Three SCART Connectors MAX4399
Table 12. Register 07h: TV Video Output Control
DESCRIPTION BIT 7 -- Set TV Slow Switching -- -- -- -- TV_R/C_OUT Ground -- -- -- -- -- -- TV_Y/CVBS_OUT Switch -- -- RF_CVBS_OUT Switch -- 1 -- -- -- -- -- -- 0 1 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 0 -- 0 0 1 1 -- -- 0 1 0 1 -- 1 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 6 -- -- -- -- -- 5 -- -- -- -- -- 4 -- -- -- -- -- 3 -- -- -- -- -- 2 -- -- -- -- 0 1 0 0 1 1 -- 0 0 1 0 1 -- COMMENTS Low (<2V) internal source (power-on default) Medium (4.5V to 7V). External SCART source with 16:9 aspect ratio. High impedance High (>9.5V). External SCART source with 4:3 aspect ratio. Normal operation. Pulldown on TV_R/C_OUT is off (power-on default). Ground. Pulldown on TV_R/C_OUT is on. The output amplifier driving TV_R/C_OUT turns off. 0 (power-on default) Same level as ENC_FS_IN Same level as VCR_FS_IN V_VID Composite video from the Y/C mixer is output The TV_Y/CVBS_OUT signal selected in register 06h is output (power-on default) Composite video from the Y/C mixer is output (power-on default) The TV_Y/CVBS_OUT signal selected in register 06h is output
Fast Switching
Table 13. Register 08h: VCR Video Input Control
DESCRIPTION 7 -- -- -- -- -- -- -- -- -- VCR_R/C_IN Clamp/Bias 0 1 6 -- -- -- -- -- -- -- -- -- -- -- 5 -- -- -- -- -- -- -- -- -- -- -- BIT 4 3 ---- ---- ---- ---- ---- ---- ---- ---- -- -- -- -- -- -- 2 -- 0 0 0 0 1 1 1 1 -- -- 1 -- 0 0 1 1 0 0 1 1 -- -- 0 -- 0 1 0 1 0 1 0 1 -- -- COMMENTS VCR_Y/CVBS_OUT VCR_R/C_OUT ENC_Y/CVBS_IN ENC_R/C_IN ENC_Y_IN ENC_C_IN VCR_Y/CVBS_IN VCR_R/C_IN AUX_Y/CVBS_IN AUX_R/C_IN TV_Y/CVBS_IN TV_R/C_IN Mute Mute Mute Mute Mute (power-on Mute (power-on default) default) DC restore clamp active at input (poweron default) Chroma bias applied at input
Input Sources for VCR Video
26
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Audio/Video Switch for Three SCART Connectors MAX4399
Table 14. 09h: VCR Video Output Control
DESCRIPTION BIT 7 -- Set VCR Slow Switching -- -- -- -- VCR_R/C_OUT Ground -- -- -- -- -- 1 -- -- 6 -- -- -- -- -- 5 -- -- -- -- -- 4 -- -- -- -- -- 3 -- -- -- -- -- 2 -- -- -- -- 0 1 0 0 1 1 -- 0 0 1 0 1 -- COMMENTS Low (<2V) internal source (power-on default) Medium (4.5V to 7V). External SCART source with 16:9 aspect ratio. High impedance High (>9.5V). External SCART source with 4:3 aspect ratio. Normal operation. Pulldown on TV_R/C_OUT is off (power-on default) Ground. Pulldown on TV_R/C_OUT is on. The output amplifier driving VCR_R/C_OUT turns off.
Table 15. Register 0Ah: AUX Video Input Control
DESCRIPTION 7 -- -- -- -- -- -- -- -- -- AUX_R/C_IN Clamp/Bias 0 1 6 -- -- -- -- -- -- -- -- -- -- -- 5 -- -- -- -- -- -- -- -- -- -- -- BIT 4 3 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 2 -- 0 0 0 0 1 1 1 1 -- -- 1 -- 0 0 1 1 0 0 1 1 -- -- 0 -- 0 1 0 1 0 1 0 1 -- -- COMMENTS AUX_Y/CVBS_OUT AUX_R/C_OUT ENC_Y/CVBS_IN ENC_R/C_IN ENC_Y_IN ENC_C_IN VCR_Y/CVBS_IN VCR_R/C_IN AUX_Y/CVBS_IN AUX_R/C_IN TV_Y/CVBS_IN TV_R/C_IN Mute Mute Mute Mute Mute (power-on Mute (power-on default) default) DC restore clamp active at input (poweron default) Chroma bias applied at input
Input Sources for AUX Video
Table 16. Register 0Bh: AUX Video Output Control
DESCRIPTION BIT 7 -- Set AUX Slow Switching -- -- -- -- AUX_R/C_OUT Ground -- -- -- -- -- 1 -- -- 6 -- -- -- -- -- 5 -- -- -- -- -- 4 -- -- -- -- -- 3 -- -- -- -- -- 2 -- -- -- -- 0 1 0 0 1 1 -- 0 0 1 0 1 -- COMMENTS Low (<2V). Internal source (power-on default). Medium (4.5V to 7V). External SCART source with 16:9 aspect ratio. High impedance High (>9.5V). External SCART source with 4:3 aspect ratio. Normal operation. Pulldown on TV_R/C_OUT is off (power-on default). Ground. Pulldown on TV_R/C_OUT is on. The output amplifier driving AUX_R/C_OUT turns off.
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27
Audio/Video Switch for Three SCART Connectors MAX4399
Table 17. Register 0Ch: Output Enable
DESCRIPTION VCR_R/C_OUT VCR_Y/CVBS_OUT 7 -- -- -- -- 6 -- -- -- -- 5 -- -- -- -- BIT 4 3 -- -- -- -- -- -- -- -- 2 -- -- -- -- 1 -- -- 0 1 0 0 1 -- -- COMMENTS Off (power-on default) On Off (power-on default) On
Table 18. Register 0Dh: Output Enable
DESCRIPTION RF_CVBS_OUT TV_FS_OUT TV_Y/CVBS_OUT TV_B_OUT TV_G_OUT TV_R/C_OUT AUX_R/C_OUT AUX_Y/CVBS_OUT 7 -- -- -- -- -- -- -- -- -- -- -- -- -- -- 0 1 6 -- -- -- -- -- -- -- -- -- -- -- -- 0 1 -- -- 5 -- -- -- -- -- -- -- -- -- -- 0 1 -- -- -- -- BIT 4 3 -- -- -- -- -- -- -- -- -- -- -- -- -- 0 -- 1 0 -- 1 -- -- -- -- -- -- -- -- -- -- -- -- -- 2 -- -- -- -- 0 1 -- -- -- -- -- -- -- -- -- -- 1 -- -- 0 1 -- -- -- -- -- -- -- -- -- -- -- -- 0 0 1 -- -- -- -- -- -- -- -- -- -- -- -- -- -- COMMENTS Off (power-on default) On Off (power-on default) On Off (power-on default) On Off (power-on default) On Off (power-on default) On Off (power-on default) On Off (power-on default) On Off (power-on default) On
28
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Audio/Video Switch for Three SCART Connectors MAX4399
Read Mode: Description of Register Table 19. Register 0Eh: Status
DESCRIPTION BIT 7 -- -- TV Slow Switch Status -- -- -- -- VCR Slow Switch Status -- -- -- -- AUX Slow Switch Status -- -- -- Power-On Reset -- 1 -- -- -- -- -- -- 6 -- -- -- -- -- -- -- -- -- -- -- -- 0 5 -- -- -- -- -- -- -- -- 0 0 1 1 -- 4 -- -- -- -- -- -- -- -- 0 1 0 1 -- 3 -- -- -- -- 0 0 1 1 -- -- -- -- -- 2 -- -- -- -- 0 1 0 1 -- -- -- -- -- 1 0 0 1 1 -- -- -- -- -- -- -- -- -- 0 0 1 0 1 -- -- -- -- -- -- -- -- -- COMMENTS 0 to 2V; internal source 4.5V to 7V; external source with 16:9 aspect ratio Not used 9.5V to 12.6V; external source with 4:3 aspect ratio 0 to 2V; internal source 4.5V to 7V; external source with 16:9 aspect ratio Not used 9.5V to 12.6V; external source with 4:3 aspect ratio 0 to 2V; internal source 4.5V to 7V; external source with 16:9 aspect ratio Not used 9.5V to 12.6V; external source with 4:3 aspect ratio V_DIG is too low for digital logic to operate V_DIG is high enough for digital logic to operate
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29
Audio/Video Switch for Three SCART Connectors MAX4399
Typical Application Circuit
ENC_Y/CVBS_IN_SC
VCR_Y/CVBS_IN_SC
AUX_Y/CVBS_IN_SC
TV_Y/CVBS_IN_SC
ENC_R/C_IN_SC
VCR_R/C_IN_SC
AUX_R/C_IN_SC
VCR_FS_IN_SC
TV_R/C_IN_SC
ENC_C_IN_SC
ENC_G_IN_SC
VCR_G_IN_SC
ENC_Y_IN_SC
ENC_B_IN_SC
VCR_B_IN_SC
ENC_FS_IN
200nH 0.01F +5V VIDEO SUPPLY 10F 68 ENC_FS_IN +5V DIGITAL SUPPLY 1 V_DIG 67 ENC_C_IN 66 ENC_Y_IN 65 ENC_B_IN 64 ENC_G_IN 63 ENC_R/C_IN 62 ENC_Y/CVBS_IN 61 V_VID 60 VCR_B_IN 59 VCR_G_IN 58 VCR_R/C_IN 57 VCR_FS_IN 56 VCR-Y/CVBS_IN 55 AUX_Y/CVBS_IN 54 AUX_R/C_IN 53 TV_Y/CVBS_IN 52 TV_R/C_IN
VID_BIAS
51 10F
DEV_ADDR
2
DEV_ADDR
G_VID
50
SDA
3
SDA
VCR_R/C_OUT
49
VCR_R/C_OUT_SC
SCL
4
SCL
VCR_Y/CVBS_OUT
48
VCR_Y/CVBS_OUT_SC
INTERRUPT_OUT
5
INTERRUPT_OUT
AUX_Y/CVBS_OUT
47 0.01F
AUX_Y/CVBS_OUT_SC
6
G_DIG
V_VID
46
10k ENC_L_IN_SC
7
ENC_L_IN
AUX_R/C_OUT
45
AUX_R/C_OUT_SC
10k
8
ST_AUX_IN
TV_B_OUT
44
TV_B_OUT_SC
ST_AUX_IN_SC
10k
9
ENC_R_IN
ENC_R_IN_SC 10 10F 11 AUD_BIAS
MAX4399
TV_G_OUT
43
TV_G_OUT_SC
G_VID
42
V_AUD
TV_R/C_OUT
41
TV_R/C_OUT_SC
10k AUX_L_IN_SC
12
AUX_L_IN
TV_Y/CVBS_OUT
40
TV_Y/CVBS_OUT_SC
10k
13
AUX_R_IN
RF_CVBS_OUT
39 0.01F
RF_CVBS_OUT_SC
AUX_R_IN_SC
10k
14
VCR_R_IN
V_VID
38
VCR_R_IN_SC
10k
15
VCR_L_IN
TV_FS_OUT
37
TV_FS_OUT_SC
VCR_L_IN_SC
10k
16
TV_R_IN
G_VID
36 22pF
TV_R_IN_SC
PHONO_L_OUT
TV_L_IN AUX_R_OUT VCR_R_OUT AUX_L_OUT VCR_L_OUT G_AUD V_AUD
RF_MONO_OUT
10k
PHONO_R_OUT
17
TRAP TV_R_OUT TV_L_OUT AUX_SS VCR_SS V_AUD TV_SS
35
1.8k
22H
G_AUD
TV_L_IN_SC
18
19 10F AUX_L_OUT_SC
20 10F AUX_R_OUT_SC
21 10F VCR_R_OUT_SC
22
23 10F
24 10F PHONO_R_OUT_SC
25 10F
26
27 10F RF_MONO_OUT_SC
28 10F TV_L_OUT_SC
29 10F TV_R_OUT_SC
30
V12 31
32
33
34
10k 0.47F +12V
10k
10k
PHONO_L_OUT_SC
VCR_L_OUT_SC
AUX_SS
10F ALL CAPACITORS ARE 0.1F AND ALL RESISTORS ARE 75, UNLESS OTHERWISE NOTED.
10F
30
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VCR_SS
TV_SS
Audio/Video Switch for Three SCART Connectors
Pin Configuration
ENC_FS_IN ENC_C_IN ENC_Y_IN ENC_B_IN ENC_G_IN ENC_R/C_IN ENC_Y/CVBS_IN V_VID VCR_B_IN VCR_G_IN VCR_R/C_IN VCR_FS_IN VCR_Y/CVBS_IN AUX_Y/CVBS_IN AUX_R/C_IN TV_Y/CVBS_IN TV_R/C_IN
MAX4399
TOP VIEW
68
67 66 65 64
63 62 61 60 59 58
57 56 55 54 53 52
V_DIG DEV_ADDR SDA SCL INTERRUPT_OUT G_DIG ENC_L_IN ST_AUX_IN ENC_R_IN AUD_BIAS V_AUD AUX_L_IN AUX_R_IN VCR_R_IN VCR_L_IN TV_R_IN TV_L_IN
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17
51 50 49 48 47 46 45
MAX4399
44 43 42 41 40 39 38 37 36 35
VID_BIAS G_VID VCR_R/C_OUT VCR_Y/CVBS_OUT AUX_Y/CVBS_OUT V_VID AUX_R/C_OUT TV_B_OUT TV_G_OUT G_VID TV_R/C_OUT TV_Y/CVBS_OUT RF_CVBS_OUT V_VID TV_FS_OUT G_VID TRAP
18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34
G_AUD AUX_L_OUT AUX_R_OUT VCR_R_OUT V_AUD VCR_L_OUT PHONO_R_OUT PHONO_L_OUT G_AUD RF_MONO_OUT TV_L_OUT TV_R_OUT V_AUD V12 AUX_SS TV_SS VCR_SS
Chip Information
TRANSISTOR COUNT: 18,134 PROCESS: BiCMOS
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31
Audio/Video Switch for Three SCART Connectors MAX4399
Package Information
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.)
68L QFN THIN.EPS
PACKAGE OUTLINE 68L QFN THIN, 10x10x0.8 MM
21-0142
A
PACKAGE OUTLINE 68L QFN THIN, 10x10x0.8 MM
21-0142
A
32
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Audio/Video Switch for Three SCART Connectors
Package Information (continued)
(The package drawing(s) in this data sheet may not reflect the most current specifications. For the latest package outline information, go to www.maxim-ic.com/packages.)
MAX4399
PACKAGE OUTLINE, SOT-23, 6L
21-0058
F
1 1
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 33 (c) 2003 Maxim Integrated Products Printed USA is a registered trademark of Maxim Integrated Products.
6LSOT.EPS

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