U6359B

TELEFUNKEN Semiconductors

Rev. A1, 18-Sep-96

1 (6)

Frequency Synthesizer for TV Tuner

Description

The U6359B is a single chip PLL frequency synthesizer

with 3-wire bus control. This IC contains an integrated

preamplifier, a high frequency prescaler, a reference

frequency divider, a crystal oscillator, a phase/frequency

detector together with a charge pump, a tuning voltage

amplifier and 4 output ports.

Features

D Integrated prescaler ÷ 8 with preamplifier

D Input frequency maximum 1024 MHz

D Tuning frequency steps 62.5 kHz

D 14-bit programmable counter

D Reference oscillator with 4 MHz crystal

and

÷ 512 counter

D Phase detector (reference frequency 7.8125 kHz)

D 4 programmable port driver

D Lock output

D Microcomputer controlled via 3-wire bus

D SO20 package

Block Diagram

Shiftregister / latch

18 bit

Port driver

Format

control

14

13

12

11

Phase

14 Bit counter

Charge

pump

1/8

3

2

4

15

17

1/8

Oscillator

20

7

6

5

8

16

10

9

18

1

19

Enable

Data

Clock

Crystal

Lock

V

2

L)

GND (ECL)

PD

VD

V

Test 1

Test 2

Port 1...4

12596

Detector

1/64

Figure 1. Block diagram

Ordering Information

Extended Type Number

Package

Remarks

U6359B-BFLG3

SO20 plastic package

Taped and reeled