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SAA5231
DATA SLICER FOR TELETEXT PROCESSOR
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SEPARATION OF TELETEXT DATA FROM THE COMPOSITE VIDEO SIGNAL SEPARATION OF HORIZONTAL AND VERTICAL SYNCHRONIZATION SIGNALS FROM THE COMPOSITE VIDEO SIGNAL EXTERNAL OSCILLATOR GENERATING 6MHz SIGNAL SYNCHRONIZED TO A MULTIPLE OF THE LINE FREQUENCY BY PLL A 6.9375MHz CLOCK GENERATED FROM AN EXTERNAL QUARTZ CRYSTAL "AFTER-HOURS" SYNCHRONIZATION OPTION PROGRAMMABLE LEVELS FOR THE INPUT COMPOSITE VIDEO SIGNAL (1V OR 2.5V) PROCESSING OF EXTERNAL TELETEXT DATA OUTPUT OF POSITIVE OR NEGATIVE SYNCHRONIZING SIGNALS 28 PIN DIP PACKAGE HDS2P2 TECHNOLOGY
DESCRIPTION The SAA5231 is a monolithic integrated circuit in 28 Pin DIP package designed to separate Teletext signals from TV signal.
DIP28 (Plastic Package) ORDER CODE : SAA5231
PIN CONNECTIONS
Sync. Output Video Input Level Select HF Filter Store HF Store Amplitude Store Zero Level External Data Input Data Timing Store Phase VCR Xtal Clock Filter Ground Clock Output (TTC)
1 2 3 4 5 6 7 8 9 10 11 12 13 14
28 27 26 25 24 23 22 21 20 19 18 17 16 15
TCS / SCS Composite Video Input Black Level VCS Pulse Timing Capacitor Pulse Timing Resistor Sandcastle Input Pulse (PL / CBB) Filter 1 Oscillator Input Filter 2 Oscillator Output 6 MHz Output (F6)
5231-01.EPS
Supply Vcc Data Output (TTD)
September 1993
1/8
SAA5231
PIN DESCRIPTION
Pin 1 2 3 4-5-6 "Store HF" "Store amplitude" "Store zero level" 7 8 9 10 11 12 13 14 15 16 17 18/20 19 21 22 23 24 25 26 27 28 External data input Data timing Store phase "Video Tape Recorder" mode (VCR) Crystal Clock filter Ground Teletext clock output Teletext data output Supply VCC 6MHz clock output Oscillator output/input Filter 2 Filter 1 "Sandcastle" input pulse Pulse timing resistor Pulse timing capacitor Composite video synchronizing output (VCS) Black level Composite video input Teletext composite sync. input (TCS) or Scan composite sync. input (SCS) 6MHz clock output for the SDA5243 An external resonant circuit between Pins 18 and 20 is connected to the 6MHz internal VCO Low time constant filter for phase detection of the horizontal signal High time constant filter for phase detection of the horizontal signal Input of the sandcastle signal produced by the SDA5243 from the PL and CBB signals External resistor of 68 kohms used to define the current for the pulse generator External capacitor of 270pF to define the timing of the pulse generator Synchronizing output for the SDA5243 Storage of the black level for the adaptive sync. Separator on an external 68nF capacitor
5231-01.TBL
Function Display Synchronization Outputs Input video signal level H.F. filter
Description Synchronization signal output available as positive or negative Input level selected as 1V (Pin 2 low) or 2.5V (Pin 2 not connected) Video signal filtering using an external capacitor of 15pF Three external capacitors used to store : 1/ HF amplitude 2/ Amplitude of adaptative data slicer 3/ Zero level "Teletext data slice" input from external circuit Connection of an external 270pF capacitor for the timing of the adaptative data slicer Storage on an external capacitor of the output signal "Clock phase detector" Control signal for the PLL in the low-time constant mode External connection for a 13.875MHz crystal. This frequency, divided by 2, yields the 6.9375MHz cloc Filter for 6.9375MHz clock Clock output for the SDA5243 Output of Teletext data for the SDA5243
Composite video signal input for the adaptive sync. Separator via an external capacitor of 2.2F TCS input from the SDA5243 or SCS input from an alternative synchronizing circuit.
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VCC 26 18 24 23 22 21 19 20 18 25
BUFFER
SWITCH
BLOCK DIAGRAM
27
SYNC. SLICING CLAMP
SYNC. SEPARATOR PULSE GENERATOR
LINE PHASE DETECT.
FILTER SWITCH
VCO 6MHz 17 STABILIZED SUPPLY
28
SENSE NO PL SELECT 1 OR 2
10 TV SYNC. SWITCH
SVS EXTERNAL DATA SLICER DATA LATCHES
SCBLC
SENSE NO LOAD ON PIN 1
DATA LATCH
BUFFER
15
DUAL POLARITY BUFFER
EXT. SENSE BUFFER
14
1
CLOCK LIMITER MATRIX
CLOCK PHASE DETECTOR
PHASE SHIFTER
12
2
GAIN SWITCH VIDEO BUFFER
:2
HF COMP.
SENSE HF LOSS
SENSE AMP. AND GATE DRIVE
SENSE ZERO LEVEL
DATA TIMING
CBB SLICING
OSCILL.
13
3
4
5
7
6
8
9
11
SAA5231
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5231-02.EPS
SAA5231
ABSOLUTE MAXIMUM RATINGS
Symbol V16 -I25 -I15 -I14 -I17 I1 Tstg Tj Tamb Parameter Supply Voltage Output Current VCS Output Current TTD Output Current TTC Output Current F6 Output Current Sync. Storage Temperature Junction Ambient Temperature Value 13.2 5 10 10 10 5 -40, +150 0, +150 0, +70 Unit V mA mA mA mA mA o C o C o C
Symbol Rth (j-a)
Parameter Thermal Resistance Junction-Ambient
Max.
Value 70
o
Unit C/W
ELECTRICAL CHARACTERISTICS (VS = 12 V , TA = 25oC , unless otherwise specified)
Symbol POWER SUPPLY (Pin 16) VS IS V27 Supply Voltage Supply Current Input Signal Level Pin 2 to ground Pin 2 open Synchronism Signal Amplitude Teletext Data Level Pin 2 to ground Pin 2 open Generator Resistance Low Voltage (V 27 = 1V) High Voltage (V27 = 2.5V) Low Current High Current Signal TTD Output Transition Times Load Capacitance DC Voltage at Output Signal TTC Transition Times Load Capacitance Time Deviation with Respect to TTD DC Voltage at Output Low Output Voltage High Output Voltage 10.8 12 70 13.2 V mA Parameter Min Typ Max Unit
CVBS INPUT (Pin 27) 0.7 1.75 0.1 0.3 0.75 1 2.5 0.46 1.15 1.4 3.5 1 0.7 1.75 250 0.8 5.5 150 1.3 3.5 30 4 2.5 20 -20 3.5 30 0 4 4.5 45 40 20 4.5 45 40 v v V v v V V A mA V ns pF V V ns pF ns V V V
5231-04.TBL
V27(p-p) V27(txt)
R G27 V2L V2H -I2L I2H V15(p-p) tr , tf C 15 V15DC V14(p-p) tr , tf C 14 tD V14DC V25L V25H 4/8
VIDEO INPUT LEVEL SELECT (Pin 2) 0 2 0 0 2.5 20
TELETEXT DATA(Pin 5)
DATA CLOCK (Pin 14)
SYNC. PULSE SEPARATION VCS (to SDA5243) (Pin 25) 0 2.1 0.4 5.5
5231-03.TBL
THERMAL DATA
5231-02.TBL
SAA5231
ELECTRICAL CHARACTERISTICS (VS = 12 V , TA = 25oC ,unless otherwise specified) (continued)
Symbol I25L -I25H tD V1(p-p) Low Output Current HighOutput Current Delay with respect to CVBS sync. 0.5 Parameter Min Typ Max 0.5 1.5 Unit mA mA s SYNC. PULSE SEPARATION VCS (to SDA5243) (Pin 25)
SYNC. OUTPUT DRIVER (to TV set) (Pin 1) Output Voltage TCS Operation CVBS Operation DC voltage with load resistor to ground (positive synchronous signal) Output Current DC voltage with load resistor to VS (negative synchrononous signal) Output Current 0.45 1 1.4 3 10.1 3 V V V mA V mA
V1DC -I1 V1DC I1 V17(p-p) tr , tf C 17 V17DC -I28 I28 V28L V28H V28L V28H tp
6MHz CLOCK F6 (Pin 7) F6 Output Signal (negligible harmonic content) Transition Times Load Capacitance DC Voltage Input Current TCS Operation (V28 = 0 to 7 V) Input Current CVBS Operation (V28 = 10 to VS) Low Input voltage (TCS operation) (load resistor at Pin 1) High Input voltage (TCS operation) (load resistor at Pin 1) Low Input Voltage (SCS operation) (Pin 1 open) High Input Voltage (SCS operation) (Pin 1 open) Line Synchronous Pulse Width TCS Operation SCS Operation 1 20 4 40 -5 0 2 0 3.5 2 3 70 0 2 3 40 40 8.5 100 5 0.8 6.1 1.5 6.1 V ns pF V A A V V V V s s 0.8 0 VS 10 3 5.5 0.5 5.5 10 V V A V V ms V V A
SYNCHRONIZATION SELECTION (Pin 28)
VCR OPERATION (Pin 10) V10L V10H I10 V22L V22H tpl V22L V22H I22 Low Input Voltage VCR Operation High Input Voltage Standard Operation Input Current Phase Locked Mode Input Low Voltage PL Phase Locked Mode Input High Voltage PL PL - low time for free-wheeling oscillator Reset Pulse for Data Separation Input Low Voltage CBB Reset Pulse for Data Separation Input High Voltage CBB Input Current 0 2 -10 0 3.9 100 0 1 -10
SANDCASTLE PULSE INPUT (Pin 22)
EXTERNAL DATA INPUT (CURRENT SOURCE DRIVING) (Pin 7) Internal Data Processing Input I7 V7 I7L I7H V7 Current Voltage (I7 = -10 to 100A) External Data Processing Input Current for low Level Current for High Level Voltage (I7 = -1000 to -25A) -175 -1000 7 -10 0 10 -40 -500 8 -25 -325 100 A V A A V 5/8
5231-05.TBL
SAA5231
APPLICATION DIAGRAMS Figure 1a : Application Diagram with LC Circuit in 6MHz PLL
47F 82 47nF 3.3k
V CC 22nF 15F
47nF
47nF
TC S VC S
1.2k
Sandcastle Input
68k
50H
220pF
68nF
2.2F Composite Video Input
28 27 26
10pF
F6 10nF
(1)
20 19 18
TTD 17 16 15
25
24
23
22
21
27pF
9 10 11 12 13 14 TTC
Sync Out
1 2
SAA5231
3 4 5 6
7
8
470pF
100pF
15pF
Video Input Level Select
XTAL 13.875MHz
1.2k
270pF
15pF
22nF
1nF
15H
Data Input (1) Coil : 50H at 1kHz, Co = 4pF, Adjust the free running frequency to 6000kHz 30kHz
VCR
Figure 1b : Application Diagram with Ceramic Resonator in 6MHz PLL
10F
470
3.3k
220nF
V CC
47nF
47nF
22nF
15F
TC S VC S
1.2k
Sandcastle Input
6MHz
18pF
330
220pF
Composite Video Input
68nF
(1) 23 22 21 20 19 18
22pF
2.2F
68k
F6 10nF
TTD 17 16 15
28
27
26
25
24
27pF
Sync Out
SAA5231
1 2
3 4 5 6
7
8
9
10
11
12
13
14 TTC
470pF
270pF
100pF
15pF
Video Input Level Select
XTAL 13.875MHz
15pF
1.2k
22nF
1nF
15H
Data Input (1) Ceramic resonator e.g : Kyocera KBR 6.0M, Adjust the free running frequency to 6010kHz 5kHz
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5231-04.EPS
5231-03.EPS
SAA5231
APPLICATION DIAGRAMS (continued) Figure 1c : Application Diagram with Quartz Crystal in 6MHz PLL
V
CC
47nF
47nF
22nF
15F
TCS VCS Sandcastle
1.2k
Input
6MHz
330
68k
220pF
Composite Video Input
28 27 26
68nF
(1) 23 22 21 20 19 18
22pF
2.2F
18pF
F6 10nF
TTD 17 16 15
25
24
27pF
9 10 11 12 13 14 TTC
Sync Out
SAA5231
1 Video 2
3 4 5 6
7
8
470pF
270pF
100pF
Input Level Select
XTAL 13.875MHz
15pF
1.2k
22nF
1nF
(1) Quartz Crystal e.g catalogue number 4322 143 04101, Adjust the free running frequency to 6000.2kHz 0.2kHz
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5231-05.EPS
Data Input
15pF
15H
SAA5231
PACKAGE MECHANICAL DATA 28 PINS - PLASTIC DIP
a1 I L
b1 b b2 e3 e E
D
28
15
F
1
14
Dimensions a1 b b1 b2 D E e e3 F i L
Min.
Millimeters Typ. 0.63 0.45 1.27
Max.
Min.
Inches Typ. 0.025 0.018 0.050
Max.
0.23
0.31 37.4 16.68 2.54 33.02 14.1 4.445 3.3
0.009
0.012 1.470 0.657 0.100 1.300 0.555 0.175 0.130
DIP28.TBL
15.2
0.598
Information furnished is believed to be accurate and reliable. However, SGS-THOMSON Microelectronics assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No licence is granted by implication or otherwise under any patent or patent rights of SGS-THOMSON Microelectronics. Specifications mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. SGS-THOMSON Microelectronics products are not authorized for use as critical components in life support devices or systems without express written approval of SGS-THOMSON Microelectronics. (c) 1994 SGS-THOMSON Microelectronics - All Rights Reserved Purchase of I2C Components of SGS-THOMSON Microelectronics, conveys a license under the Philips I2C Patent. Rights to use these components in a I2C system, is granted provided that the system conforms to the I2C Standard Specifications as defined by Philips. SGS-THOMSON Microelectronics GROUP OF COMPANIES Australia - Brazil - China - France - Germany - Hong Kong - Italy - Japan - Korea - Malaysia - Malta - Morocco The Netherlands - Singapore - Spain - Sweden - Switzerland - Taiwan - Thailand - United Kingdom - U.S.A.
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PM-DIP28.EPS

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