TLW12458

PRELIMINARY

November 1996

LMX2301

PLLatinum

for RF Personal Communications

General Description

The LMX2301 is a high performance frequency synthesizer

designed for RF operation up to 160 MHz It is fabricated

using National’s ABiC IV BiCMOS process

LMX2301 which employs the digital phase lock loop tech-

nique combined with a high quality reference oscillator and

a loop filter provides the tuning voltage for the voltage con-

trolled oscillator to generate a very stable low noise local

oscillator signal

Serial data is transferred into the LMX2301 via a three line

age can range from 27V to 55V

The LMX2301 features very low current consumption typi-

cally 2 mA at 3V

The LMX2301 is available in a TSSOP 20-pin surface mount

plastic package

Features

Y

RF operation up to 160 MHz

Y

27V to 55V operation

Y

Low current consumption

Y

Internal balanced low leakage charge pump

Y

Small-outline plastic surface mount TSSOP

0173

wide package

Applications

Y

Analog Cellular telephone systems

(AMPS ETACS NMT)

Y

Portable wireless communications

(PCSPCN cordless)

Y

Other wireless communication systems

Block Diagram

TLW12458 – 1

TRI-STATE

is a registered trademark of National Semiconductor Corporation

C1996 National Semiconductor Corporation

RRD-B30M126Printed in U S A

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