LMX2335U Datasheet PDF | National Semiconductor

National Semiconductor LMX2335U

The LMX2335U and LMX2336U are monolithic, integrated dual frequency synthesizers, including two high frequency prescalers, and are designed for applications requiring two RF phase-lock loops. The LMX2335U/36U contains two dual modulus prescalers. The LMX2335U/36U combined with a high quality reference oscillator, two loop filters, and two external voltage controlled oscillators generates very stable low noise RF local oscillator signals.

Part No.	LMX2335U
Datasheet	LMX2335U Download
Manufacturer	National Semiconductor
Description	Ultra Low Power Dual Frequency Synthesizer
Buy	Stock & Price

GENERAL DESCRIPTION

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. Serial data is transferred into the LMX2335U/36U via a three wire interface (Data, Enable, Clock). Supply voltage can range from 2.7V to 5.5V. The LMX2335U/36U feature very low current consumption; LMX2335U – 3.0 mA at 3V, LMX2336U – 3.5 mA at 3V. The LMX2335U is available in a TSSOP 16-pin and CSP 16-pin surface mount plastic packages. The LMX2336U is available in a TSSOP 20-pin and CSP 24-pin surface mount plastic package.

FEATURES

n Ultra low current consumption n 2.7V to 5.5V operation n Selectable synchronous and asynchronous powerdown mode: ICC = 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 n Upgrade and compatible to LMX2335L/36L n LMX2335U available in 16 - Lead TSSOP and 16 - Pin CSP n LMX2...