Datasheet > LMX2305TMX

LMX2305TMX

更新时间： 2024-02-02 07:18:48

品牌	Logo	应用领域
罗彻斯特 - ROCHESTER		信息通信管理光电二极管
页数	文件大小	规格书
15页	435K
描述
PLL Frequency Synthesizer, BICMOS, PDSO20, 0.173 INCH, PLASTIC, TSSOP-20

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技术参数
数据手册

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LMX2305TMX 技术参数

生命周期：	Obsolete	包装说明：	,
Reach Compliance Code：	unknown	HTS代码：	8542.39.00.01
风险等级：	5.7	模拟集成电路 - 其他类型：	PLL FREQUENCY SYNTHESIZER
Base Number Matches：	1

LMX2305TMX 数据手册

PRELIMINARY

August 1996

LMX2305

PLLatinum^TM550 MHz Frequency Synthesizer

for RF Personal Communications

General Description

Features

RF operation up to 550 MHz

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.

2.65V to 5.5V operation

Low current consumption:

2.75V

4.0 mA (typ) at V

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.

Dual modulus prescaler: 64/65 or 128/129

Internal balanced, low leakage charge pump

Small-outline, plastic, surface mount TSSOP,

0.173 wide package

Applications

Analog Cellular telephone systems

(AMPS, ETACS, NMT)

Serial data is transferred into the LMX2305 via a three line

MICROWIRE^TMinterface (Data, Enable, Clock). Supply volt-

age can range from 2.65V to 5.5V. The LMX2305 features

very low current consumption, typically 4.0 mA at 2.75V.

Portable wireless communications

(PCS/PCN, cordless)

Wireless local area networks (WLANs)

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

plastic package.

Other wireless communication systems

Pagers

Block Diagram

TL/W/12459–1

TRI-STATEÉ is a registered trademark of National Semiconductor Corporation.

MICROWIRE^TMand PLLatinum^TMare trademarks of National Semiconductor Corporation.

1996 National Semiconductor Corporation

TL/W/12459

RRD-B30M126/Printed in U. S. A.

http://www.national.com

123 4 5 6 7...15

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