LMX2325TM datasheet(1/22 Pages) NSC

Part #	LMX2325TM

Description	Frequency Synthesizer for RF Personal Communications

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Manufacturer	NSC [National Semiconductor (TI)]

Direct Link	http://www.national.com

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TLW12339

September 1996

LMX2315LMX2320LMX2325 PLLatinum

TM

Frequency Synthesizer

for RF Personal Communications

LMX2325 25 GHz

LMX2320 20 GHz

LMX2315 12 GHz

General Description

The LMX231523202325’s are high performance frequen-

cy synthesizers with integrated prescalers designed for RF

operation up to 25 GHz They are fabricated using Nation-

al’s ABiC IV BiCMOS process

A 6465 or a 128129 divide ratio can be selected for the

LMX2315 and LMX2320 RF synthesizer at input frequencies

of up to 12 GHz and 20 GHz while 3233 and 6465 divide

ratios are available in the 25 GHz LMX2325 Using a propri-

etary digital phase locked loop technique the LMX2315

23202325’s linear phase detector characteristics can gen-

erate very stable low noise signals for controlling a local

oscillator

Serial data is transferred into the LMX2320 and the

LMX2325 via a three line MICROWIRETM interface (Data

Enable Clock) Supply voltage can range from 27V to 55V

The LMX2315 LMX2320 and the LMX2325 feature very low

current consumption typically 6 mA 10 mA and 11 mA re-

spectively

The LMX2315 LMX2320 and the LMX2325 are available in

a TSSOP 20-pin surface mount plastic package

Features

Y

RF operation up to 25 GHz

Y

27V to 55V operation

Y

Low current consumption

Y

Dual modulus prescaler

LMX2325

3233 or 6465

LMX2320LMX2315

6465 or 128129

Y

Internal balanced low leakage charge pump

Y

Power down feature for sleep mode

ICC e 30 mA (typ) at VCC e 3V

Y

Small-outline

plastic

surface mount TSSOP

0173

wide

Applications

Y

Cellular telephone systems

(GSM IS-54 IS-95 (RCR-27)

Y

Portable wireless communications (DECT PHS)

Y

CATV

Y

Other wireless communication systems

Block Diagram

TLW12339 – 1

TRI-STATE

is a registered trademark of National Semiconductor Corporation

MICROWIRETM and PLLatinumTM are trademarks of National Semiconductor Corporation

C1996 National Semiconductor Corporation

RRD-B30M106Printed in U S A

http

www nationalcom

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LMX2325TM Datasheet(PDF) 1 Page - National Semiconductor (TI)

LMX2325TM Datasheet(HTML) 1 Page - National Semiconductor (TI)

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