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NTE7112 Integrated Circuit Color TV Video Signal/Chrominance Signal Processing Circuit
Description: The NTE7112 is an integrated circuit in an 18-Lead DIP type package designed for use in color TV video signal and chrominance signal processing circuits. Features: D Chrominance signal processing circuitry for either PAL or SECAM system color TV receivers can be made by using the NTE7112 in combination with the AN5622 and the AN5630N: PAL System: NTE7112, AN5622 SECAM System: NTE7112, AN5622, AN5630N D Incorporating luminance signal mixer circuit, provides R, G, B original color output D DC Transmission Quality: 100% D All DC controlled adjustment simplifies wiring operation (Color/Contrast/Brightness adjustment) Absolute Maximum Ratings: (TA = +25C unless otherwise specified) Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14.4V Circuit Voltage, V4-10, V16-10, V18-10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . V17-10 to 0V Circuit Voltage, V5-10, V6-10 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +6V to -4V Circuit Current, I7,I8, I9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +7mA to -15mA Circuit Current, I11, I13, I14 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +3mA to -3mA Power Dissipation (TA = +70C), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 800mW Operating Ambient Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -20 to +70C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -55 to +155C Electrical Characteristics: (TA = +25C unless otherwise specified)
Parameter Total Circuit Current Voltage Gain (Max Video) Contrast Attenuation Ratio (Min) Frequency Characteristics (Video) Symbol Itot AV AVmax/AVmin fc Test Conditions VCC = 12V Sine wave 10kHz, 100mVrms input, Contrast max., Picture min. Sine wave 100mVrms input frequency when output/input is -3dB, Picture min. (10kHz level assumed as 0dB) Min 27 3.1 Typ 37 4.0 Max 47 4.9 0.26 - Unit mA times times MHz
0.15 0.19 6 -
Electrical Characteristics (Cont'd): (TA = +25C unless otherwise specified)
Parameter DC Transfer Quantity Color Difference Voltage Amplification B-Y R-Y G - Y Color Difference Ratio Symbol TDC Test Conditions Video input 1VP-P(stair step), APL 10 to 90, B output Sine wave 10kHz, 240mVP-P, Pin9 output voltage gain for Pin12 input Cosine wave 10kHz, 200mVP-P Pin7 for Pin15 input Min 90 Typ 96 Max 100 Unit %
AV (B - Y) AV (R - Y)
5.1 5.1
6.6 6.6
7.9 7.9 0.40
times times times
G - Y/B - Y Sine wave 10kHz, 240VP-P, Pin12 0.28 0.34 input cosine wave 10kHz, 200mVP-P, Pin8 output ratio to Pin9 output for Pin15 input (G - Y) In G - Y/B - Y, phase difference between Pin8 output and Pin9 output Sine/Cosine wave 10kHz, Pin7 or Pin9 output voltage at input 1.5VP-P Superimpose 3.58MHz components at 10mVP-P on the video part of stair step 1VP-P for measurement with a vector scope V4 = 8V, VR-4 for input invalid Signal: VR-5 RGB outputs 234 236
Demodulation Color (G - Y)
239
deg.
Color Difference Output Voltage (max.) Differential Gain (Video Amp)
eo DG
5.5 -
6.5 -
7.6 6
VP-P %
Demodulation DC Output Voltage EO(DC) Change w/Supply Voltage EO(DC) Change w/Ambient Temperature DC Voltage Difference between Demodulation Outputs EX-Y Change w/Supply Voltage EX-Y Change w/Ambient Temperature Pedestal Clamp Voltage Blanking Voltage
EO(DC)
1.3
1.9
2.4 0.32 +0.5 300 100 100 1.05 1.05
V V/V mV/C mV mV mV V V
EO(DC)/VCC VCC = 12V 20%, V7 = 2V (VCC = 12V) RGB outputs EO(DC)/TA EX-Y EX-Y/VCC EX-Y/TA V(clamp) V(BLK) V7 = 2V (TA = +25C) TA = -20 to +70C, RGB outputs V7 = 2V, Output differential voltage for each of R.G.B VCC = 12V 20%, V7 = 2V (VCC = 12V) for VCC = 12V V7 = 2V (TA = +25C) TA = -20 to +70C, for TA = +25C Pulse voltage for pedestal clamp operation
0.16 0.24 -4 - - - -2 0 0 0
0.65 0.85
Pulse voltage for blanking operation 0.65 0.85
Pin Connection Diagram
Y Signal Input Picture Control Y Clamp Capacitor Brightness Control Pedestal Clamp Pulse Input Blanking Pulse Input R Output G Output B Output
1 2 3 4 5 6 7 8 9
18 Contrast Control 17 VCC 16 Color Control 15 R - Y Signal Input 14 R - Y Clamp Cap 13 G - Y Clamp Cap 12 B - Y Signal Input 11 B - Y Clamp Cap 10 GND
18
10
1
9
.870 (22.1) Max .150 (3.8)
.250 (6.35)
.100 (2.54) .800 (20.3)
.125 (3.17) Min

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