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LMX1511NSN/a120avaiPLLatinum 1.1 GHz Frequency Synthesizer for RF Personal Communications


LMX1511 ,PLLatinum 1.1 GHz Frequency Synthesizer for RF Personal CommunicationsFeaturesYRF operation up to 1.1 GHzTheLMX1501AandtheLMX1511arehighperformancefre-Yquencysynthesizer ..
LMX1511TM ,PLLatinumTM 1.1 GHz Frequency Synthesizer for RF Personal CommunicationsFeaturesYRF operation up to 1.1 GHzTheLMX1501AandtheLMX1511arehighperformancefre-Yquencysynthesizer ..
LMX1511TM ,PLLatinumTM 1.1 GHz Frequency Synthesizer for RF Personal CommunicationsLMX1501A/LMX1511PLLatinum1.1GHzFrequencySynthesizerforRFPersonalCommunicationsNovember1995TMLMX1501 ..
LMX1511TMX ,PLLatinumTM 1.1 GHz Frequency Synthesizer for RF Personal CommunicationsLMX1501A/LMX1511PLLatinum1.1GHzFrequencySynthesizerforRFPersonalCommunicationsNovember1995TMLMX1501 ..
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LMX1511
PLLatinum 1.1 GHz Frequency Synthesizer for RF Personal Communications
TL/W/12340
LMX1501A/LMX1511
PLLatinum
GHz
Frequency
Synthesizer
for
Personal
Communications
November 1995
LMX1501A/LMX1511 PLLatinumTM
1.1 GHz Frequency Synthesizer
for RF Personal Communications
General Description
The LMX1501Aand theLMX1511are high performancefre-
quencysynthesizers withintegrated prescalers designedfor operationupto1.1 GHz. Theyare fabricated usingNa-
tional’s ABiCIV BiCMOS process.
The LMX1501A andthe LMX1511 contain dual modulus
prescalers which can select eithera 64/65ora 128/129
divide ratioat input frequenciesofupto1.1 GHz. Usinga
proprietary digital phase locked loop technique, the
LMX1501A/11’s linear phase detector characteristicscan
generate very stable,low noise local oscillator signals.
Serial datais transferred intothe LMX1501A andthe
LMX1511viaa threeline MICROWIRETM interface (Data,
Enable, Clock). Supply voltagecan rangefrom 2.7V to5.5V.
The LMX1501Aandthe LMX1511 feature verylow current
consumption, typically6mAat3V.
The LMX1501Ais availableina JEDEC 16-pin surface
mount plastic package. The LMX1511is availableina
TSSOP 20-pin surface mount plastic package.
FeaturesRF operationupto1.1 GHz 2.7Vto 5.5V operation Low current consumption:
ICCe6mA (typ)at VCCe3V Dual modulus prescaler: 64/65or 128/129 Internal balanced,low leakage charge pump Small-outline, plastic, surface mount JEDEC, 0.150×
wide, (1501A)or TSSOP, 0.173× wide, (1511) package
Applications Cellular telephone systems
(AMPS, NMT, ETACS) Portable wireless communications
(PCS/PCN, Cordless) Advanced cordless telephone systems
(CT-1/CT-1a, CT-2, ISM902-928) Other wireless communication systems
Block Diagram
TL/W/12340–1
TRI-STATEÉ isaregistered trademarkof National SemiconductorCorporation.
MICROWIRETMand PLLatinumTMaretrademarksof National Semiconductor Corporation.
C1995National SemiconductorCorporation RRD-B30M115/PrintedinU.S.A.
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