NTE1786 Datasheet, PDF (1/5 Pages) NTE Electronics – Integrated Circuit Frequency Lock Loop (FLL) Tuning & Control Circuit

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 func-
tions, 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, V_CC1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 to +18V
Pin19, V_CC2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 to +18V
Pin14, V_CC3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 to +36V