Features: RF operation up to 550 MHz2.65V to 5.5V operationLow current consumption:ICC e 4.0 mA (typ) at VCC e 2.75VDual modulus prescaler: 64/65 or 128/129Internal balanced, low leakage charge pumpSmall-outline, plastic, surface mount TSSOP,0.173* wide packageApplicationAnalog Cellular telephone ...
LMX2305: Features: RF operation up to 550 MHz2.65V to 5.5V operationLow current consumption:ICC e 4.0 mA (typ) at VCC e 2.75VDual modulus prescaler: 64/65 or 128/129Internal balanced, low leakage charge pump...
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The LMX2305 is a high performance frequency synthesizerwith an integrated prescaler designed for RF operation up to550 MHz. It is fabricated using National's ABiC IV BiCMOSprocess.
The LMX2305 contains a dual modulus prescaler which canselect either a 64/65 or a 128/129 divide ratio at input fre-quencies of up to 550 MHz. LMX2305, which employs thedigital phase lock loop technique, combined with a highquality reference oscillator and a loop filter, provides thetuning voltage for the voltage controlled oscillator to gener-ate a very stable, low noise local oscillator signal.
Serial data is transferred into the LMX2305 via a three lineMICROWIRETM interface (Data, Enable, Clock). Supply volt-age can range from 2.65V to 5.5V. The LMX2305 featuresvery low current consumption, typically 4.0 mA at 2.75V.
The LMX2305 is available in a TSSOP 20-pin surface mount plastic package.