NTE1437 Integrated Circuit VIR Signal Processor Description: The NTE1437 is an integrated circuit designed for color TV VIR (Vertical Interval Reference) signal processing circuits (with auto tint compensation circuit). Features: D Incorporating VIR signal discriminator color control, tint control and Y signal amplifier on a single chip, easier for compact set design. D Reduction in external components D No adjustment required Absolute Maximum Ratings: (TA = +25°C unless otherwise specified) Supply Voltage, V8−21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14.4V Supply Voltage, V17−21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6.1V Circuit Voltage, V5−21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to 14.4V Circuit Voltage, V6−21, V7−21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −3 to +6V Circuit Voltage, V10−21, V12−21, V18−21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to V8−21V Circuit Voltage, V24−21 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0V Circuit Current, I5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to 20mA Circuit Current, I9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −1 to +3mA Circuit Current, I20 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −3 to +1mA Circuit Current, I23 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −3 to 0mA Power Dissipation, PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 630mW Operating Ambient Temperature Range, Topr . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −20° to +70°C Storage Temperatuere Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . −20° to +150°C Note *. + and − are flow−in and flow−out currents to/from the circuit, respectively. Electrical Characteristics: (TA = +25°C unless otherwise specified) Parameter Symbol I8 Circuit Current Test Conditions V8−21 = 12V V17−21 = 5 5.1V 1V I17 Min Typ Max Unit 20 25.5 31 mA 5 12 19 mA Output Voltage “H” Level (Tint Manual) “L” Level V9−21(H) 10.3 11 11.7 V V9−21(L) 0.6 1.3 2.0 V Output Voltage “H” Level (Color Manual) “L” Level V20−21(H) 9.5 10.2 10.9 V V20−21(L) 0 − 0.3 V Output Voltage “H” Level (Tint Auto) “L” Level V11−21(H) 9.5 10.2 10.9 V V11−21(L) 0.4 1.7 2.7 V Output Voltage “H” Level (Color Auto) “L” Level V19−21(H) 10.1 10.9 11.7 V V19−21(L) 0.4 1.8 3.1 V Voltage Amplification (Y Amp.) VIR Directional Level Pin 4 output (SW 1:1) for Pin 1 video signal input (1Vp−p) 1.75 1.95 2.15 times V(VIR) Pin 2 VIR signal level (SW 1:1) at the start of LED ON 0.23 0.28 0.33 V tw 19H pulse width of Pins 14 & 16 (SW 1:2) 7 12 17 μs Tint Manual Control S(1) Differential voltage ratio between Pins 9 & 12 0.83 0.94 1.05 times Color Manual Control S(2) Differential voltage ratio between Pins 20 & 18 (SW 1:2) 0.86 0.97 1.08 times Tint Auto Control S(3) Differential voltage ratio between Pins 9 & 13 (SW 1:1) 40 43 46 dB Color Auto Control S(4) Differential voltage ratio between Pins 20 & 15 (SW 1:2) 41.5 44.5 47.5 dB Tint Pre−Emphasis Control S(5) Differential voltage ratio between Pins 9 & 10 (SW 1:1) −1.5 −1.3 −1.1 times Pulse Width (19H) Sensitivity AV Pin Connection Diagram (Front View) Y Signal Input Variable Y Signal Input Fixed 1 24 Sync Input 2 23 RC Coupling Network Ripple Filter To Color Prefer Control VIR Signal Presence Indicator Horiz Blank Pulse In 3 22 RC Coupling Network 4 21 GND 5 20 Color Control Output 6 19 Ripple Filter Vert Blank Pulse In 7 18 Manual Color Control VCC 8 17 VCC Tint Control Output 9 16 Ripple Filter To Tint Prefer 10 Control Ripple Filter 11 15 B − Y Signal Input Manual Tint Control 12 13 R − Y Signal Input 14 Ripple Filter 24 13 1 12 .520 (13.2) 1.300 (33.02) Max .225 (5.73) Max .100 (2.54) 1.100 (27.94) .126 (3.22) Min .600 (15.24)