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LMX2314M Datasheet

  • LMX2314M

  • 1.2 GHz Frequency Synthesizer for RF Personal Communications

  • 364.40KB

  • 20頁

  • NSC

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LMX2314 LMX2315 PLLatinum 1 2 GHz Frequency
Synthesizer for RF Personal Communications
March 1995
LMX2314 LMX2315 PLLatinum
TM
1 2 GHz Frequency Synthesizer
for RF Personal Communications
General Description
The LMX2314 and the LMX2315 are high performance fre-
quency synthesizers with integrated prescalers designed for
RF operation up to 1 2 GHz They are fabricated using Na-
tional鈥檚 ABiC IV BiCMOS process
The LMX2314 and the LMX2315 contain dual modulus pre-
scalers which can select either a 64 65 or a 128 129 divide
ratio at input frequencies of up to 1 2 GHz Using a proprie-
tary digital phase locked loop technique the LMX2314 15鈥檚
linear phase detector characteristics can generate very sta-
ble low noise local oscillator signals
Serial data is transferred into the LMX2314 and the
LMX2315 via a three line MICROWIRE
TM
interface (Data
Enable Clock) Supply voltage can range from 2 7V to 5 5V
The LMX2314 and the LMX2315 feature very low current
consumption typically 6 mA at 3V
The LMX2314 is available in a JEDEC 16-pin surface mount
plastic package The LMX2315 is available in a TSSOP
20-pin surface mount plastic package
Features
Y
Y
Y
Y
Y
Y
Y
RF operation up to 1 2 GHz
2 7V to 5 5V operation
Low current consumption
I
CC
e
6 mA (typ) at V
CC
e
3V
Dual modulus prescaler 64 65 or 128 129
Internal balanced low leakage charge pump
Power down feature for sleep mode
I
CC
e
30
mA
(typ) at V
CC
e
3V
Small-outline plastic surface mount JEDEC 0 150
wide (2314) or TSSOP 0 173 wide (2315) package
Applications
Y
Y
Y
Cellular telephone systems
(GSM IS-54 IS-95 RCR-27)
Portable wireless communications
(DECT ISM902-928 CT-2)
Other wireless communication systems
Block Diagram
TL W 11766 鈥?1
TRI-STATE is a registered trademark of National Semiconductor Corporation
MICROWIRE
TM
and PLLatinum
TM
are trademarks of National Semiconductor Corporation
C
1995 National Semiconductor Corporation
TL W 11766
RRD-B30M115 Printed in U S A

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