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| NTE879 Integrated Circuit RGB to PAL/NTSC Encoder for Color TV Description: The NTE879 is an integrated circuit in a 20-Lead DIP type package used to generate a composite TV signal from baseband red, blue, green, and sync inputs. This device has color subcarrier oscillator, voltage controlled 90 phase shifter, two DSB suppressed carrier chroma modulators, RGB input matrices, and blanking level clamps. It can be operated with very few external parts, but has the pin-outs for a fully implemented, top quality composite signal. It is ideal for encoding signals from color cameras and graphic generators. Features: D Reference Oscillator Self-Contained or Externally Driven D Nominal 90 5 Axes are Optionally Trimmable D Simple PAL/NTSC Switch D Luminance and Chroma Channels can accept Delay Line/Bandpass Elements or Direct Connection D Provides DC Reference to Permit Direct Drive to RF Modulator Absolute Maximum Ratings: Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15V 8.2Vdc Regulator Output Current, IREG . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10mA Power Dissipation, PD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.25W Derate Above 25C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10mW/C Junction Temperature, TJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +150C Operating Temperature Range, TA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to +70C Storage Temperature Range, Tstg . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -65 to +150C Recommended Operating Conditions: Supply Voltage, VCC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 2V Sync Tip Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -0.5 to +1.0V Sync, Blanking Level . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +1.7 to +8.2V Reg, Green, Blue Inputs (Saturated) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1VP-P Electrical Characteristics: (VCC = 12V, TA = +25C unless otherwise specifed) Parameter Supply Current Oscillator Amplitude External Subcarrier Input Subcarrier Input Resistance Capacitance Modulation Angle Angle Adjustment R, G, B Input R, G, B Input Resistance Capacitance Sync Threshold Sync Input Resistance Chroma Output Level Chroma Output Resistance Chroma Input Resistance Capacitance Composite Output Sync Luminance Chroma Burst Output Impedance Luminance Bandwidth Subcarrier Leakage in Output Pin9, Note 1 3dB, Less Delay Line, Pin9 Pin9 100% Saturation, Pin9 - - - - - - - 0.6 1.4 1.7 0.6 - 8.0 - - - - - 100 - 40 VP-P VP-P VP-P VP-P MHz mVP-P Pin2 Input > 1.7V, Pin2 100% Saturation. Pin13 Pin13 Pin10 - - 10 2.0 - - k pF (R-Y) to (B-Y) (R-Y), Pin19 100% Color Saturation Pin3, Pin4, Pin5 Pin3, Pin4, Pin5 - - - - - - 10 2.0 1.7 10 1.0 - - - - - - 80 k pF V k VP-P Pin Number/Test Conditions Pin14 Pin18 Oscillator Components Removed, Pin17 Pin17 - - 85 - 0.95 5.0 2.0 90 0.25 1.0 - - 95 - 1.05 k pF Degrees Deg/A VP-P Min - - - Typ Max 32 0.5 0.25 - - - Unit mA VP-P VRMS Note 1. Output impedance can be reduced to less than 10 by using a 150 output load from Pin9 to GND. Power supply current will increase to about 60mA. Pin Connection Diagram Ramp Generator Input Sync Input Red Input Green Input Blue Input Luminance Output Decoupling Luminance Input Composite Output 1 2 3 4 5 6 7 8 9 20 PAL/NTSC Select 19 Decoupling 18 X'tal OSC 17 X'tal OSC 16 Vref 8.2V 15 GND 14 VCC 13 Chroma Output 12 Decoupling 11 Decoupling Chroma Input 10 20 11 .339 (8.6) 1 10 1.063 (27.0) Max .200 (5.08) Max .400 (10.16) .100 (2.54) .100 (2.54) Min |
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