LMX2305 National Semiconductor, LMX2305 Datasheet

LMX2305

Manufacturer Part Number

LMX2305

Description

PLLatinumTM 550 MHz Frequency Synthesizer for RF Personal Communications

Manufacturer

National Semiconductor

Datasheet

1.LMX2305.pdf (14 pages)

Available stocks

Company

Part Number

Manufacturer

Quantity

Price

Company:

Bonase Electronics (HK) Co., Limited

Part Number:

LMX2305

Manufacturer:

Quantity:

126

Company:

Meier Automation Equipment Co., Limited

Part Number:

LMX2305TMD

Manufacturer:

NS/国半

Quantity:

20 000

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C 1996 National Semiconductor Corporation

LMX2305

PLLatinum

for RF Personal Communications

General Description

The LMX2305 is a high performance frequency synthesizer

with an integrated prescaler designed for RF operation up to

550 MHz It is fabricated using National’s ABiC IV BiCMOS

process

The LMX2305 contains a dual modulus prescaler which can

select either a 64 65 or a 128 129 divide ratio at input fre-

quencies of up to 550 MHz LMX2305 which employs the

digital phase lock loop technique combined with a high

quality reference oscillator and a loop filter provides the

tuning voltage for the voltage controlled oscillator to gener-

ate a very stable low noise local oscillator signal

Serial data is transferred into the LMX2305 via a three line

MICROWIRE

age can range from 2 65V to 5 5V The LMX2305 features

very low current consumption typically 4 0 mA at 2 75V

The LMX2305 is available in a TSSOP 20-pin surface mount

plastic package

Block Diagram

TRI-STATE is a registered trademark of National Semiconductor Corporation

MICROWIRE

and PLLatinum

interface (Data Enable Clock) Supply volt-

are trademarks of National Semiconductor Corporation

550 MHz Frequency Synthesizer

TL W 12459

Features

Applications

RF operation up to 550 MHz

2 65V to 5 5V operation

Low current consumption

Dual modulus prescaler 64 65 or 128 129

Internal balanced low leakage charge pump

Small-outline plastic surface mount TSSOP

0 173 wide package

Analog Cellular telephone systems

(AMPS ETACS NMT)

Portable wireless communications

(PCS PCN cordless)

Wireless local area networks (WLANs)

Other wireless communication systems

Pagers

RRD-B30M126 Printed in U S A

4 0 mA (typ) at V

2 75V

PRELIMINARY

http

www national com

August 1996

TL W 12459 – 1

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