lmx2335u National Semiconductor Corporation, lmx2335u Datasheet

lmx2335u

Manufacturer Part Number

lmx2335u

Description

Pllatinum Ultra Low Power Dual Frequency Synthesizer For Rf Personal Communications

Manufacturer

National Semiconductor Corporation

Datasheet

1.LMX2335U.pdf (48 pages)

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Bonase Electronics (HK) Co., Limited

Part Number:

lmx2335uTM

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LMX2335U/LMX2336U

PLLatinum

Synthesizer for RF Personal Communications

LMX2335U

LMX2336U

General Description

The LMX2335U and LMX2336U devices are high perfor-

mance frequency synthesizers with integrated dual modulus

prescalers. The LMX2335U and LMX2336U devices are

designed for use in applications requiring two RF

phase-locked loops.

A 64/65 or a 128/129 prescale ratio can be selected for each

RF synthesizer. Using a proprietary digital phase locked loop

technique, the LMX2335U and LMX2336U devices generate

very stable, low noise control signals for the RF voltage

controlled oscillators. Both RF synthesizers include a

two-level programmable charge pump. The RF1 synthesizer

has dedicated Fastlock circuitry.

Serial data is transferred to the devices via a three wire

interface (Data, LE, Clock). Supply voltages from 2.7V to

5.5V are supported. The LMX2335U and the LMX2336U

feature very low current consumption:

LMX2335U (1.2 GHz)– 3.0 mA, LMX2336U (2.0 GHz)–

3.5 mA at 3.0V.

The LMX2335U device is available in 16-pin TSSOP, and

16-pin Chip Scale Package (CSP) surface mount plastic

packages. The LMX2336U device is available in 20-Pin

TSSOP, 24-Pin CSP, and 20-Pin UTCSP surface mount

plastic packages.

TRI-STATE

Fastlock

Chip Scale Package (SLB16A)

™

Thin Shrink Small Outline Package (MTC16)

, MICROWIRE

is a registered trademark of National Semiconductor Corporation.

™

and PLLatinum

10136788

™

Ultra Low Power Dual Frequency

are trademarks of National Semiconductor Corporation.

1.2 GHz/1.2 GHz

2.0 GHz/1.2 GHz

10136787

DS101367

Chip Scale Package (SLB24A)

Features

n Ultra Low Current Consumption

n Upgrade and Compatible to the LMX2335L and

n 2.7V to 5.5V operation

n Selectable Synchronous or Asynchronous Powerdown

n Selectable Dual Modulus Prescaler

n Selectable Charge Pump TRI-STATE

n Programmable Charge Pump Current Levels

n Selectable Fastlock

n Push-Pull Analog Lock Detect Mode

n LMX2335U is available in 16-Pin TSSOP and 16-Pin

n LMX2336U is available in 20-Pin TSSOP, 24-Pin CSP,

Applications

n Mobile Handsets

n Cordless Handsets (DECT, DCT)

n Wireless Data

n Cable TV Tuners

10136781

LMX2336L devices

Mode:

CSP

and 20-Pin UTCSP

RF1: 64/65 or 128/129

RF2: 64/65 or 128/129

RF1 and RF2: 0.95 or 3.8 mA

(GSM, GPRS, W-CDMA, CDMA, PCS, AMPS, PDC,

DCS)

CC-PWDN

Thin Shrink Small Outline Package (MTC20)

= 1 µA typical at 3.0V

™

Ultra Thin Chip Scale Package

Mode for the RF1 Synthesizer

10136780

(SLE20A)

10136795

Mode

November 2002

www.national.com

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