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PDF NTE1786 Data sheet ( Hoja de datos )
| Número de pieza | NTE1786 | |
| Descripción | Integrated Circuit Frequency Lock Loop (FLL) Tuning & Control Circuit | |
| Fabricantes | NTE | |
| Logotipo |  |
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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, VCC1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 to +18V
Pin19, VCC2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 to +18V
Pin14, VCC3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . –0.3 to +36V
1 page  
Pin Connection Diagram
DAC3 Output 1
Serial Data Line 2
Serial Clock Line 3
P20 4
P21 5
I/O Ports P22 6
P23 7
AFC (+) Input 8
AFC (–) Input 9
Tuning Voltage Amp
Invert Input
10
GND 11
Tuning Voltage Amp
Output
12
24 DAC2 Output
23 DAC1 Output
22 DAC0 Output
21 X’tal OSC Input
20 Prescaler Input
19 VCC 2 (13V Typ)
18 P13
17 P12 Band Select
16 P11 Output Ports
15 P10
14 VCC 3 (32V Typ)
13 VCC 1 (12V Typ)
24 13
1 12
1.300 (33.02)
Max
.100 (2.54)
1.100 (27.94)
.255
(5.73)
Max
.520
(13.2)
.126
(3.22)
Min
.600
(15.24)
5 Page | ||
| Páginas | Total 5 Páginas | |
| PDF Descargar | [ Datasheet NTE1786.PDF ] | |
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