LMX2336LTM Datasheet

IC型號：
LMX2336LTM
PDF描述：
PLLatinum⑩ Low Power Dual Frequency Synthesizer for RF Pers...
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PDF頁數(shù)：
22頁
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LMX2335L/LMX2336L PLLatinum Low Power Dual Frequency Synthesizer for RF Personal

Communications

PRELIMINARY

June 1999

LMX2335L/LMX2336L

PLLatinum

鈩?/div>

Low Power Dual Frequency Synthesizer for

RF Personal Communications

LMX2335L

LMX2336L

1.1 GHz/1.1 GHz

2.0 GHz/1.1 GHz

Features

Ultra low current consumption

2.7V to 5.5V operation

Selectable synchronous and asynchronous powerdown

mode:

= 1 碌A(chǔ) (typ)

Dual modulus prescaler: 64/65 or 128/129

Selectable charge pump TRI-STATE

廬

mode

Selectable charge pump current levels

Selectable Fastlock

鈩?/div>

mode

Upgrade and compatible to LMX2335/36

Small-outline, plastic, surface mount TSSOP package

LMX2336 available in CSP package

General Description

The LMX2335L and LMX2336L are monolithic, integrated

dual frequency synthesizers, including two high frequency

prescalers, and are designed for applications requiring two

RF phase-lock loops. They are fabricated using National鈥檚

0.5碌 ABiC V silicon BiCMOS process.

The LMX2335L/36L contains two dual modulus prescalers. A

64/65 or a 128/129 prescaler can be selected for each RF

synthesizer. A second reference divider chain is included in

the IC for improved system noise. The LMX2335L/36L com-

bined with a high quality reference oscillator, two loop filters,

and two external voltage controlled oscillators generates

very stable low noise RF local oscillator signals.

Serial data is transferred into the LMX2335L/36L via a three

wire interface (Data, Enable, Clock). Supply voltage can

range from 2.7V to 5.5V. The LMX2335L/36L feature very

low current consumption; LMX2335L 4.0 mA at 5V,

LMX2336L 5.5 mA at 5V. The LMX2335L is available in SO,

TSSOP and CSP 16-pin surface mount plastic packages.

The LMX2336L is available in a TSSOP 20-pin and CSP

24-pin surface mount plastic package.

Applications

Cellular telephone systems (AMPS, ETACS, RCR-27)

Cordless telephone systems

(DECT, ISM , PHS, CT-1+)

Personal Communication Systems

(DCS-1800, PCN-1900)

Dual Mode PCS phones

Cable TV Tuners (CATV)

Other wireless communication systems

Functional Block Diagram

DS012807-1

TRI-STATE

廬

is a registered trademark of National Semiconductor Corporation.

Fastlock

鈩?/div>

, MICROWIRE

鈩?/div>

and PLLatinum

鈩?/div>

are trademarks of National Semiconductor Corporation.

漏 1999 National Semiconductor Corporation

DS012807

www.national.com

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