LMX2301 PLLatinum 160 MHz Frequency Synthesizer
for RF Personal Communications
PRELIMINARY
November 1996
LMX2301
PLLatinum
TM
160 MHz Frequency Synthesizer
for RF Personal Communications
General Description
The LMX2301 is a high performance frequency synthesizer
designed for RF operation up to 160 MHz It is fabricated
using National鈥檚 ABiC IV BiCMOS process
LMX2301 which employs the digital phase lock loop tech-
nique combined with a high quality reference oscillator and
a loop filter provides the tuning voltage for the voltage con-
trolled oscillator to generate a very stable low noise local
oscillator signal
Serial data is transferred into the LMX2301 via a three line
MICROWIRE
TM
interface (Data Enable Clock) Supply volt-
age can range from 2 7V to 5 5V
The LMX2301 features very low current consumption typi-
cally 2 mA at 3V
The LMX2301 is available in a TSSOP 20-pin surface mount
plastic package
Features
Y
Y
Y
Y
Y
RF operation up to 160 MHz
2 7V to 5 5V operation
Low current consumption
I
CC
e
2 mA (typ) at V
CC
e
3V
Internal balanced low leakage charge pump
Small-outline plastic surface mount TSSOP
0 173 wide package
Applications
Y
Y
Y
Analog Cellular telephone systems
(AMPS ETACS NMT)
Portable wireless communications
(PCS PCN cordless)
Other wireless communication systems
Block Diagram
TL W 12458 鈥?1
TRI-STATE is a registered trademark of National Semiconductor Corporation
MICROWIRE
TM
and PLLatinum
TM
are trademarks of National Semiconductor Corporation
C
1996 National Semiconductor Corporation
TL W 12458
RRD-B30M126 Printed in U S A
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