NTE1786
Integrated Circuit
Frequency Lock Loop (FLL)
Tuning & Control Circuit
Description:
The NTE1786 is an integrated circuit in a 24鈥揕ead DIP type package that provides closed鈥搇oop 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鈥揷urrent 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鈥揅urrent Outputs for Direct Band Selection
D
4 Static Digital鈥搕o鈥揂nalog 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鈥揚in, 4MHz On鈥揅hip Oscillator
D
I
2
C Bus Slave Transceiver
Applications:
D
TV Receivers
D
Satellite Receivers
D
CATV Converters
Absolute Maximum Ratings:
Supply Voltage Ranges,
Pin13, V
CC1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 鈥?.3 to +18V
Pin19, V
CC2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 鈥?.3 to +18V
Pin14, V
CC3
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 鈥?.3 to +36V
1
2
3
4
5
