NJW1503A

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PLL Synthesizer with 3-Wire Bus for TV Tuner

DESCRIPTION

The NJW1503A is a PLL frequency synthesizer especially designed

for TV and VCR tuning systems and consists of PLL circuit and a

prescaler which operates up to 1.0GHz, built into one chip.

The NJW1503A is controlled through a 3-wire bus.

FEATURES

• Operating Voltage 5V

• Low Operating Current : 15mA typ. @Vcc=5V

• Prescaler accepts frequencies up to 1GHz on chip

• 3-wire bus controlled

• Reference divider ratio automatic setting (512 or 1024)

• 34V max. tuning voltage output

• Package Outline: SSOP16

BLOCK DIAGRAM

PACKAGE OUTLINE

NJW1503AV

BS0-BS3

BAND SW

4bit

4bit

Latch

VCC3

VCC1

5V

GND

CS

DAT

CLK

3Wire Bus

Receiver

15bit

Latch

8bit

Latch

Programmable

Divider 15bit

PreAMP

1/8

CP

VCC2

AMPOUT

HF IN

AMP

Phase

OUT

Phase

Comp

1/1024

1/512

(1/640)

Ref

Divider

X’tal

OSC

OSCOUT

XTAL