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 = +25°C 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 = +70°C), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 800mW Operating Ambient Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –20° to +70°C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –55° to +155°C Electrical Characteristics: (TA = +25°C unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit Total Circuit Current Itot VCC = 12V 27 37 47 mA Voltage Gain (Max Video) AV Sine wave 10kHz, 100mVrms input, Contrast max., Picture min. 3.1 4.0 4.9 times 0.15 0.19 0.26 times – MHz Contrast Attenuation Ratio (Min) Frequency Characteristics (Video) AVmax/AVmin fc Sine wave 100mVrms input frequency when output/input is –3dB, Picture min. (10kHz level assumed as 0dB) 6 – Electrical Characteristics (Cont’d): (TA = +25°C unless otherwise specified) Parameter DC Transfer Quantity Color Difference Voltage Amplification B–Y R–Y G – Y Color Difference Ratio Symbol Min Typ Max Unit Video input 1VP–P(stair step), APL 10 to 90, B output 90 96 100 % AV (B – Y) Sine wave 10kHz, 240mVP–P, Pin9 output voltage gain for Pin12 input 5.1 6.6 7.9 times AV (R – Y) Cosine wave 10kHz, 200mVP–P Pin7 for Pin15 input 5.1 6.6 7.9 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 0.40 times TDC Test Conditions ∠(G – Y) In G – Y/B – Y, phase difference between Pin8 output and Pin9 output 234 236 239 deg. Color Difference Output Voltage (max.) eo Sine/Cosine wave 10kHz, Pin7 or Pin9 output voltage at input 1.5VP–P 5.5 6.5 7.6 VP–P Differential Gain (Video Amp) DG Superimpose 3.58MHz components at 10mVP–P on the video part of stair step 1VP–P for measurement with a vector scope – – 6 % 1.3 1.9 2.4 V 0.16 0.24 0.32 V/V Demodulation Color (G – Y) Demodulation DC Output Voltage EO(DC) Change w/Supply Voltage EO(DC) Change w/Ambient Temperature EO(DC) ∆EO(DC)/VCC VCC = 12V ±20%, V7 = 2V (VCC = 12V) RGB outputs ∆EO(DC)/TA DC Voltage Difference between Demodulation Outputs ∆EX–Y ∆EX–Y Change w/Supply Voltage ∆EX–Y/VCC ∆EX–Y Change w/Ambient Temperature Pedestal Clamp Voltage Blanking Voltage V4 = 8V, VR–4 for input invalid Signal: VR–5 RGB outputs ∆EX–Y/TA V(clamp) V(BLK) V7 = 2V (TA = +25°C) TA = –20° to +70°C, RGB outputs –4 –2 +0.5 mV/°C V7 = 2V, Output differential voltage for each of R.G.B – 0 ±300 mV VCC = 12V ±20%, V7 = 2V (VCC = 12V) for VCC = 12V – 0 ±100 mV V7 = 2V (TA = +25°C) TA = –20° to +70°C, for TA = +25°C – 0 ±100 mV 0.65 0.85 1.05 V Pulse voltage for blanking operation 0.65 0.85 1.05 V Pulse voltage for pedestal clamp operation Pin Connection Diagram Y Signal Input 1 18 Contrast Control Picture Control 2 17 VCC Y Clamp Capacitor 3 16 Color Control Brightness Control 4 15 R – Y Signal Input Pedestal Clamp Pulse Input 5 14 R – Y Clamp Cap Blanking Pulse Input 6 13 G – Y Clamp Cap R Output 7 12 B – Y Signal Input G Output 8 11 B – Y Clamp Cap B Output 9 10 GND 18 10 1 9 .250 (6.35) .870 (22.1) Max .150 (3.8) .100 (2.54) .800 (20.3) .125 (3.17) Min