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LMX2305 Datasheet(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part No. LMX2305
Description  PLLatinumTM 550 MHz Frequency Synthesizer for RF Personal Communications
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LMX2305 Datasheet(HTML) 1 Page - National Semiconductor (TI)

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TLW12459
PRELIMINARY
August 1996
LMX2305
PLLatinum
TM 550 MHz Frequency Synthesizer
for RF Personal Communications
General Description
The LMX2305 is a high performance frequency synthesizer
with an integrated prescaler designed for RF operation up to
550 MHz It is fabricated using National’s ABiC IV BiCMOS
process
The LMX2305 contains a dual modulus prescaler which can
select either a 6465 or a 128129 divide ratio at input fre-
quencies of up to 550 MHz LMX2305 which employs the
digital phase lock loop technique combined with a high
quality reference oscillator and a loop filter provides the
tuning 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 line
MICROWIRETM interface (Data Enable Clock) Supply volt-
age can range from 265V to 55V The LMX2305 features
very low current consumption typically 40 mA at 275V
The LMX2305 is available in a TSSOP 20-pin surface mount
plastic package
Features
Y
RF operation up to 550 MHz
Y
265V to 55V operation
Y
Low current consumption
ICC e 40 mA (typ) at VCC e 275V
Y
Dual modulus prescaler 6465 or 128129
Y
Internal balanced low leakage charge pump
Y
Small-outline plastic surface mount TSSOP
0173
wide package
Applications
Y
Analog Cellular telephone systems
(AMPS ETACS NMT)
Y
Portable wireless communications
(PCSPCN cordless)
Y
Wireless local area networks (WLANs)
Y
Other wireless communication systems
Y
Pagers
Block Diagram
TLW12459 – 1
TRI-STATE
is a registered trademark of National Semiconductor Corporation
MICROWIRETM and PLLatinumTM are trademarks of National Semiconductor Corporation
C1996 National Semiconductor Corporation
RRD-B30M126Printed in U S A
http
www nationalcom


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