LMX2305TMX ,PLLatinumTM 550 MHz Frequency Synthesizer for RF Personal CommunicationsApplicationsate a very stable, low noise local oscillator signal.YAnalog Cellular telephone systems ..
LMX2306 ,550 MHz PLLatinum Low Power Frequency Synthesizer for RF personal CommunicationsApplicationsback tuning voltage for a voltage controlled oscillator toYPortable wireless communicat ..
LMX2306TM ,550 MHz PLLatinum Low Power Frequency Synthesizer for RF Personal CommunicationsPin Descriptions16-Pin 16-Pin Pin I/O DescriptionTSSOP CSP Name115 FL O FastLock Output. For connec ..
LMX2306TMX ,550 MHz PLLatinum Low Power Frequency Synthesizer for RF Personal CommunicationsPin Descriptions16-Pin 16-Pin Pin I/O DescriptionTSSOP CSP Name115 FL O FastLock Output. For connec ..
LMX2310USLDX ,2.5 GHz PLLatinum Ultra Low Power Frequency Synthesizer for RF Personal CommunicationsFeaturesn RF operation up to 2.5 GHzThe LMX2310/1/2/3U are high performance frequency syn-thesizers ..
LMX2310USLDX ,2.5 GHz PLLatinum Ultra Low Power Frequency Synthesizer for RF Personal CommunicationsLMX2310U/LMX2311U/LMX2312U/LMX2313U PLLatinum Ultra Low Power Frequency Synthesizerfor RF Personal ..
LQW18AN6N8C00D , Chip Inductor (Chip Coil) for High Frequency Horizontal Wire Wound
LQW18AN6N8D00D , Chip Inductor (Chip Coil) for High Frequency Horizontal Wire Wound
LQW18AN6N8D00D , Chip Inductor (Chip Coil) for High Frequency Horizontal Wire Wound
LQW18AN8N2D00D , Chip Inductor (Chip Coil) for High Frequency Horizontal Wire Wound
LQW18AN8N2D00D , Chip Inductor (Chip Coil) for High Frequency Horizontal Wire Wound
LQW18ANR10G00 , DESIGN ENGINEERING KITS
LMX2305TM-LMX2305TMX
PLLatinumTM 550 MHz Frequency Synthesizer for RF Personal Communications
TL/W/12459
LMX2305
PLLatinum
MHz
Frequency
Synthesizer
for
Personal
Communications
PRELIMINARY
August 1996
LMX2305
PLLatinumTM 550 MHz Frequency Synthesizer
for RF Personal Communications
General Description
The LMX2305isa high performance frequency synthesizer
withan integrated prescalerdesignedforRF operationupto
550 MHz.Itis fabricated using National’s ABiCIV BiCMOS
process.
The LMX2305 containsa dual modulus prescaler whichcan
select eithera 64/65ora 128/129 divide ratioat inputfre-
quenciesofupto550 MHz. LMX2305, which employsthe
digital phase lock loop technique, combined witha high
quality reference oscillator anda loop filter, providesthe
tuning voltageforthe voltage controlled oscillatorto gener-
atea very stable,low noise local oscillator signal.
Serial datais transferredintothe LMX2305viaa threeline
MICROWIRETM interface (Data, Enable, Clock). Supply volt-
agecan range from 2.65Vto 5.5V. The LMX2305 features
verylow current consumption, typically4.0mAat 2.75V.
The LMX2305is availableina TSSOP 20-pin surface mount
plastic package.
FeaturesRF operationupto550 MHz 2.65Vto 5.5V operation Low current consumption:
ICCe4.0mA (typ)at VCCe 2.75V Dual modulus prescaler: 64/65or 128/129 Internal balanced,low leakage charge pump Small-outline, plastic, surface mount TSSOP,
0.173× wide package
Applications Analog Cellular telephone systems
(AMPS, ETACS, NMT) Portable wireless communications
(PCS/PCN, cordless) Wireless local area networks (WLANs) Other wireless communication systems Pagers
Block Diagram
TL/W/12459–1
TRI-STATEÉ isaregistered trademarkof National SemiconductorCorporation.
MICROWIRETMand PLLatinumTMaretrademarksof National Semiconductor Corporation.
C1996National SemiconductorCorporation RRD-B30M126/Printed inU.S.A. http://
