LMX2335TM datasheet(1/18 Pages) NSC

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LMX2335/LMX2336/LMX2337

PLLatinum™ Dual Frequency Synthesizer for RF

Personal Communications

LMX2335

1.1 GHz/1.1 GHz

LMX2336

2.0 GHz/1.1 GHz

LMX2337

550 MHz/550 MHz

General Description

The LMX2335, LMX2336 and LMX2337 are monolithic, inte-

grated dual frequency synthesizers, including two high fre-

quency prescalers, and are designed for applications requir-

ing two RF phase-lock loops. They are fabricated using

National’s ABiC IV silicon BiCMOS process.

The LMX2335/36/37 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. LMX2335/36/37, which

employ a digital phase locked loop technique, combined with

a high quality reference oscillator and loop filters, provide the

tuning voltages for voltage controlled oscillators to generate

very stable low noise RF local oscillator signals.

Serial data is transferred into the LMX2335/36/37 via a three

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

range from 2.7V to 5.5V. The LMX2335/36/37 feature very

low current consumption; LMX2335/37 −10 mA at 3V,

LMX2336 −13 mA at 3V. The LMX2335/37 are available in

both a JEDEC SO and TSSOP 16-pin surface mount plastic

package. The LMX2336 is available in a TSSOP 20-pin sur-

face mount plastic package.

Features

n 2.7V to 5.5V operation

n Low current consumption

n Selectable powerdown mode:

I

CC = 1 µA (typ)

n Dual modulus prescaler: 64/65 or 128/129

n Selectable charge pump TRI-STATE® mode

n Selectable charge pump current levels

n Selectable FastLock™ mode

Applications

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

n Cordless telephone systems (DECT, ISM, PHS, CT-1+)

n Personal Communication Systems

(DCS-1800, PCN-1900)

n Dual Mode PCS phones

n CATV

n Other wireless communication systems

Functional Block Diagram

TRI-STATE® is a registered trademark of National Semiconductor Corporation.

Fastlock™, MICROWIRE™ and PLLatinum™ are trademarks of National Semiconductor Corporation.

DS012332-1

September 1996

DS012332

www.national.com

Số phần tương tự - LMX2335TM

nhà sản xuất	tên linh kiện	bảng dữ liệu	Giải thích chi tiết về linh kiện
Texas Instruments	LMX2335	437Kb / 19P	PLLatinum Dual Frequency Synthesizer for RF Personal Communications
National Semiconductor ...	LMX2335L	542Kb / 22P	PLLatinum??Low Power Dual Frequency Synthesizer for RF Personal Communications
	LMX2335LM	542Kb / 22P	PLLatinum??Low Power Dual Frequency Synthesizer for RF Personal Communications
	LMX2335LSLB	542Kb / 22P	PLLatinum??Low Power Dual Frequency Synthesizer for RF Personal Communications
	LMX2335U	3Mb / 48P	PLLatinum Ultra Low Power Dual Frequency Synthesizer for RF Personal Communications

More results

Mô tả tương tự - LMX2335TM

nhà sản xuất	tên linh kiện	bảng dữ liệu	Giải thích chi tiết về linh kiện
National Semiconductor ...	LMX2330A	392Kb / 17P	PLLatinum??Dual Frequency Synthesizer for RF Personal Communications
	LMX2330L	496Kb / 21P	PLLatinum??Low Power Dual Frequency Synthesizer for RF Personal Communications
	LMX2335L	542Kb / 22P	PLLatinum??Low Power Dual Frequency Synthesizer for RF Personal Communications
	LMX2346	606Kb / 27P	PLLatinum??Frequency Synthesizer for RF Personal Communications
	LMX2370	217Kb / 16P	PLLatinum??Dual Frequency Synthesizer for RF Personal Communications
	LMX2430	943Kb / 49P	PLLatinum Dual High Frequency Synthesizer for RF Personal Communications
	LMX2323	185Kb / 12P	PLLatinum 2.0 GHz Frequency Synthesizer for RF Personal Communications
	LMX2306	338Kb / 19P	PLLatinum??Low Power Frequency Synthesizer for RF Personal Communications
Texas Instruments	LMX2335	437Kb / 19P	PLLatinum Dual Frequency Synthesizer for RF Personal Communications
Texas Instruments	LMX2430	4Mb / 48P	PLLatinum??Dual High Frequency Synthesizer for RF Personal Communications

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