LMX2332A Datasheet | National Semiconductor

Features 2.7V to 5.5V operation Low current consumption Selectable powerdown mode: ICC = 1 µA typical at 3V Dual modulus prescaler: LMX2330A (RF) 32/33 or 64/65 LMX2331A/32A (RF) 64/65 or 128/129 LMX2330A/31A/32A (IF) 8/9 or 16/17 n Selectable charge pump TRI-STATE ® mode n Selectable Fast Lock™ mode n Small outline, plastic, surface mount TSSOP 0.173" wide package n n n n General Description The LMX233x A family of monolithic, integrated dual frequency synthesizers, including prescalers, is to be used as a local oscillator for RF and first IF of a dual conversion transceiver. It is fabricated using National’s ABi C IV silicon Bi CMOS process. The LMX233x A contains dual modulus prescalers. A 64/65 or a 128/129 prescaler (32/33 or 64/65 in the 2.5 GHz LMX2330A) can be selected for the RF synthesizer and a 8/9 or a 16/17 prescaler can be selected for the IF synthesizer. LMX233XA, which employs a digital phase locked loop technique, bined with a high quality reference oscillator and loop filters, provides the tuning voltages for voltage controlled oscillators to generate very stable low noise RF and IF local oscillator signals. Serial data is transferred into the LMX233x A via a three wire interface (Data, Enable, Clock). Supply voltage can range from 2.7V to 5.5V. The LMX233x A family features very low current consumption; LMX2330A - 13 m A at 3V, LMX2331A - 12 m A at 3V, LMX2332A - 8 m A at 3V. Applications n n n n n Portable Wireless munications (PCS/PCN, cordless) Cordless and cellular telephone systems Wireless Local Area Networks (WLANs) Cable TV tuners (CATV) Other wireless munication systems Functional Block Diagram DS012331-1 TRI-STATE ® is a registered trademark of National Semiconductor Corporation. Fastlock™, MICROWIRE™ and PLLatinum™ are trademarks of National Semiconductor Corporation. © 1999 National Semiconductor Corporation DS012331 .national. Connection Diagram Thin Shrink Small Outline Package (TM) DS012331-2 Order Number LMX2330ATM, LMX2331ATM or...