Datasheet > LMX2305TM

LMX2305TM

更新时间： 2024-01-05 13:01:05

品牌	Logo	应用领域
美国国家半导体 - NSC		射频光电二极管个人通信信息通信管理
页数	文件大小	规格书
14页	229K
描述
PLLatinumTM 550 MHz Frequency Synthesizer for RF Personal Communications

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技术参数
数据手册

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LMX2305TM 技术参数

是否Rohs认证：	不符合	生命周期：	Obsolete
包装说明：	SOP, SOP20,.4	Reach Compliance Code：	unknown
风险等级：	5.92	JESD-30 代码：	R-XDSO-G20
JESD-609代码：	e0	端子数量：	20
最高工作温度：	105 °C	最低工作温度：	-40 °C
封装主体材料：	CERAMIC	封装代码：	SOP
封装等效代码：	SOP20,.4	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE	电源：	3/5 V
认证状态：	Not Qualified	筛选级别：	38535Q/M;38534H;883B
子类别：	PLL or Frequency Synthesis Circuits	最大供电电流 (Isup)：	6 mA
表面贴装：	YES	技术：	BICMOS
温度等级：	INDUSTRIAL	端子面层：	Tin/Lead (Sn/Pb)
端子形式：	GULL WING	端子节距：	1.27 mm
端子位置：	DUAL

LMX2305TM 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

12 3 4 5 6 7...14

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