NTE7121 Integrated Circuit Color TV Complete Signal Processing Circuit Description: The NTE7121 is an integrated circuit designed for all NTSC type color TV small signal processing circuits integrated on a single chip. Features: D Fewer components, easier for compact set design D Supply Voltage Range: 8.3V to 10.6V (9.6V Typ.) D 42−lead shrunk dual−in−line plastic package Absolute Maximum Ratings: (TA = +25°C unless otherwise specified) Supply Voltage, V28−27 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10.6V Supply Current, I2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18mA Supply Current, I28 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 92mA Power Dissipation (TA = +70°C), PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1100mW Operating Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −20° to +70°C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −55° to +150°C Electrical Characteristics: (TA = +25°C unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit 1.55 1.85 2.15 Vp−p Video Detector Output VO np = 80dBμ, m = 87.5%, fp = 58.75MHz Input Sensitivity VS VO = 3dB − 49 54 dBμ Max. Allowable Input VI(max) VO > +1dB 106 109 − dBμ Signal to Noise Ratio S/N ni = 80dBμ 51 54 − dB Differential Gain DG m = 87.5% − 4 8 % Differential Phase DP − 4 8 deg. 4.5 6 8 MHz 7.6 8.0 8.4 V − 0.02 0.5 V Video Frequency Characteristics fc Vo = −=dB RF AGC Max. Voltage V21(max) f = 58.75MHz RF AGC Min. Voltage V21(min) Electrical Characteristics (Cont’d): (TA = +25°C unless otherwise specified) Parameter Symbol Test Conditions Min Typ Max Unit AFC Center Voltage V29 np = 0V 3.5 4.5 5.5 V Total Detector Output Vo f = 4.5MHz, fm = 1kHz, Δf = ±25kHz, Vi = 100Vrms 390 480 570 mVrms Input Limiting Voltage Vi(lim) f = 4.5MHz, fm = 1kHz, Δf = ±25kHz, Vo = −3dB − 100 350 μVrms Total Harmonic Distortion THD f = 4.5MHz, fm = 1kHz, Δf = ±25kHz, Vi = 100mVrms − 0.3 1.0 % AM Rejection AMR f = 4.5MHz, fm = 1kHz, m = 30%, Vi = 100Vrms 40 45 − dB Horizontal Oscillation Frequency fHO Horizontal Oscillation Pulse Width THO Horizontal Pull−In Range 15.22 15.73 16.23 kHz 25 28 31 μs fHP ±0.8 ±1.0 ±1.2 kHz Overvoltage Protection Circuit Operating Start Input Voltage V4−1 0.61 0.68 0.75 V Vertical Oscillation Frequency fvo 52 55 58 Hz 0.58 0.69 0.80 ms Vertical Oscillation Pulse Width TVO Oscillation Pulse Width when fHO = 15.73kHz Pulse Width when fvo = 55Hz Vertical PullIn Range fvp 39 43 47 Hz Vertical Blanking Pulse Width TVB 0.95 1.05 1.15 ms Max. Color Difference Output VO(max) Color bar signal, Color max. 3.3 4.1 4.9 Vp−p Min. Color Difference Output (Remaining Color) VO(min) Color bar signal, Color min. − 20 50 mVp−p − − ±150 Hz Oscillation Frequency fOSC APC Pull−In Range fAPC ni = 200mVp−p ±0.5 ±0.9 ±3 kHz Tint Variable Range θ(tint) Tint Voltage ±35 ±45 ±55 deg. Demodulation Output Ratio R/B Color Bar Signal 0.84 0.94 1.04 times 0.20 0.28 0.35 times Phase Difference from B−Y axis 87.5 97.5 107.5 deg. 225 235 245 deg. Contrast Voltage, V21 = 0v to 9.3V 2.0 2.5 3.0 times f = 20kHz, Input 0.3Vp−p 7.1 7.8 8.5 times G/B Demodulation Angle <R <G Contrast Variable Range Video Voltage Gain Δeoc GV Contrast Variable Range Δevc Contrast Voltage, V21 = 0 to 9.3V 2.7 3.2 3.7 times Shapness Variable Range Δfvp f = 3MHz, Input 0.1 Vp−p 16 19 22 dB Brightness Voltage, ΔV33 = 0.3V 7.5 9 10.5 times Brightness Control Sensitivity YBright Pin Connection Diagram GND (2) VCC 2 1 42 Y Output 2 41 (R − Y) Output Horizontal Output Overvoltage Protection FB Pulse Input 3 4 40 (G − Y) Output 39 (B − Y) Output 5 38 APC Filter Horizontal VCO 6 Horizontal AFC Output 7 37 3.58MHz VCO 36 Tint Control Vertical OSC 8 35 ACC Filter Vertical Sawtooth 9 34 Color Control Vertical Output 10 Color Killer Filter 11 Video Input 12 Chrominance Input 13 Tuner AFC Coil 14 33 Brightness Control 32 Pedestal Clamp Filter 31 Contrast Control 30 Sharpness Control 29 Tuner AFC Output Video Detect Coil (1) 15 28 VCC 1 Video Detect Coil (2) 16 27 GND (1) Sync Sep Input 17 Video Output 18 Input Bias 19 SIF Input 20 RF AGC Output 21 26 VIF Input 25 IF AGC 24 RF AGC Delay Adjust 23 Sound Output 22 SIF Detect Coil 42 22 1 21 1.503 (38.2) Max .519 (13.2) .217 (5.5) .070 (1.78) .119 (3.0) .600 (15.24)