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| NTE856 Integrated Circuit TV Video Modulation Circuit Description: The NTE856 is an RF oscillator and dual-input modulator in an 8-Lead DIP type package designed to generate a TV signal from baseband video inputs. Typical applications include video games, home computer display, video recorders, and test equipment. The very low level of intermodulation products, compact package and small external component count make this device superior to simple discrete circuits. Features: D Single 5V Supply D Channel 3 or 4 Operation D Excellent Oscillator Stability to 100MHz D Color and Sound Compatibility D Dual Input Modulator for Ease of Signal D Low Intermodulation (-50dB 920kHz Beat) D Overmodulation Protection Absolute Maximum Ratings: Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8V Power Dissipation Package . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1.25W Derate above 25C . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13mW/C Junction Temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . +150C Operating Ambient Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0 to +70C Storage Temperature Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . -65 to +150C Recommended Operating Conditions: Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5V Luma Input Voltage Sync Tip . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1V Peak White . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0.35V Electrical Characteristics: (VCC = 5V, TA = +25C unless otherwise specified) Parameter Operating Supply Voltage Supply Current RF Modultor Luma Input Dynamic Range (Pin4) RF Output Voltage Luma Conversion Gain Chroma Conversion Gain Chroma Linearity (Pin7) Luma Linearity (Pin7) Input Current (Pin4) Input Resistance (Pin5) Input Resistance (Pin4) Input Capacitance (Pin4, Pin5) Residual 920kHz Output Current (Pin7) RF Oscillator Deviation Measured at Pin7, Note 1 V4 = 0 fo = 67.265MHz f = 67.25MHz, V4 = 1V V7/V4, V4 = 0.1V to 1V V7/V5, V5 = 1.5VP-P, V4 = 1V V5 = 1.5VP-P V4 = 0 to 1.5V 0 - - - - - - - 100 - - - - 15 0.8 0.95 1.0 2.0 - 800 - - 60 1.5 1.5 - - - - - -20 - - 5.0 - - V mVrms V/V V/V % % A k pF dB mA Test Conditions Min 4.75 - Typ 5.0 12 Max 5.25 - Unit V mA Temperature Characteristics (VCC = 7V, TA = 0 to +70C, IC only) Note 1. RF Reference Level = 6.0mV at Pin7. Load Impedance = 75. RF + 4.5MHz = -13dB. RF + 3.58MHz = -20dB. Pin Connection Diagram RF Tank RF Tank GND Video Input 1 2 3 4 8 7 6 5 N.C. RF Output VCC Sound/Chroma Input 8 5 .256 (6.52) Max 1 4 .393 (10.0) Max .300 (7.62) .150 (3.81) .100 (2.54) .300 (7.62) .070 (1.77) Min |
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