LMX2330U Datasheet | National Semiconductor

Description The LMX233x U devices are high performance frequency synthesizers with integrated dual modulus prescalers. The LMX233x U devices are designed for use as RF and IF local oscillators for dual conversion radio transceivers. A 32/33 or a 64/65 prescale ratio can be selected for the 2.5 GHz LMX2330U RF synthesizer. A 64/65 or a 128/129 prescale ratio can be selected for both the LMX2331U and LMX2332U RF synthesizers. The IF circuitry contains an 8/9 or a 16/17 prescaler. Using a proprietary digital phase locked loop technique, the LMX233x U devices generate very stable, low noise control signals for RF and IF voltage controlled oscillators. Both the RF and IF synthesizers include a two-level programmable charge pump. The RF 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 LMX233x U family features ultra low current consumption: LMX2330U (2.5 GHz) - 3.3 m A, LMX2331U (2.0 GHz) - 2.9 m A, LMX2332U (1.2 GHz) - 2.5 m A at 3.0V. The LMX233x U devices are available in 20-Pin TSSOP and 24-Pin CSP surface mount plastic packages. Features n n n n Ultra Low Current Consumption Upgrade and patible to LMX233x L Family 2.7V to 5.5V Operation Selectable Synchronous or Asynchronous Powerdown Mode: ICC-PWDN = 1 µA typical Selectable Dual Modulus Prescaler: LMX2330U RF: 32/33 or 64/65 LMX2331U RF: 64/65 or 128/129 LMX2332U RF: 64/65 or 128/129 LMX2330U/31U/32U IF: 8/9 or 16/17 Selectable Charge Pump TRI-STATE ® Mode Programmable Charge Pump Current Levels RF and IF: 0.95 or 3.8 m A Selectable Fastlock™ Mode for the RF Synthesizer Push-Pull Analog Lock Detect Output Available in 20-Pin TSSOP and 24-Pin Chip Scale Package (CSP) n n n n n n Applications n Mobile Handsets (GSM, GPRS, W-CDMA, CDMA, PCS, AMPS, PDC, DCS) n Cordless Handsets (DECT, DCT) n Wireless Data n Cable TV Tuners Thin Shrink Small Outline Package (MTC20) Chip Scale Package...