NTE1786

NTE1786 Integrated Circuit Frequency Lock Loop (FLL) Tuning & Control Circuit Description: The NTE1786 is an integrated circuit in a 24–Lead DIP type package that provides closed–loop digital tuning of TV receivers, with or without AFC, as required. This device also controls up to 4 analog functions, 4 general purpose I/O ports and 4 high–current outputs for tuner band selection. Features: D Combined Analog and Digital Circuitry Minimizes the Number of Additional Interfacing Components Required D Frequency Measurement with Resolution of 50kHz D Selectable Prescaler Divisor of 64 or 256 D 32V Tuning Voltage Amplifier D 4 High–Current Outputs for Direct Band Selection D 4 Static Digital–to–Analog Convertors (DACs) for Control of Analog Functions D 4 General Purpose Input/Output (I/O) Ports D Tuning with Control of Speed and Direction D Tuning with or without AFC D Single–Pin, 4MHz On–Chip Oscillator D I2C Bus Slave Transceiver Applications: D TV Receivers D Satellite Receivers D CATV Converters Absolute Maximum Ratings: Supply Voltage Ranges, Pin13, VCC1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 to +18V Pin19, VCC2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 to +18V Pin14, VCC3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 to +36V Absolute Maximum Ratings ...