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LMX2301TM-LMX2301TMX
PLLatinumTM 160 MHz Frequency Synthesizer for RF Personal Communications
TL/W/12458
LMX2301
PLLatinum
MHz
Frequency
Synthesizer
for
Personal
Communications
PRELIMINARY
November 1996
LMX2301
PLLatinumTM 160 MHz Frequency Synthesizer
for RF Personal Communications
General Description
The LMX2301isa high performance frequency synthesizer
designedforRF operationupto 160 MHz.Itis fabricated
using National’s ABiCIV BiCMOS process.
LMX2301, which employsthe digital phase lock loop tech-
nique, combinedwitha high quality reference oscillatorand loop filter, providesthe tuning voltageforthe voltage con-
trolled oscillatorto generatea very stable,low noise local
oscillator signal.
Serial datais transferredintothe LMX2301viaa threeline
MICROWIRETM interface (Data, Enable, Clock). Supply volt-
agecan range from 2.7Vto 5.5V.
The LMX2301 features verylow current consumption, typi-
cally2mAat3V.
The LMX2301is availableina TSSOP 20-pin surface mount
plastic package.
FeaturesRF operationupto160 MHz 2.7Vto 5.5V operation Low current consumption:
ICCe2mA (typ)at VCCe3V 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) Other wireless communication systems
Block Diagram
TL/W/12458–1
TRI-STATEÉ isaregistered trademarkof National SemiconductorCorporation.
MICROWIRETMand PLLatinumTMaretrademarksof National Semiconductor Corporation.
C1996National SemiconductorCorporation RRD-B30M126/Printed inU.S.A. http://
