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LMX2305TMX Datasheet

  • LMX2305TMX

  • PLLatinumTM 550 MHz Frequency Synthesizer for RF Personal Co...

  • 14頁

  • NSC

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LMX2305 PLLatinum 550 MHz Frequency Synthesizer
for RF Personal Communications
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鈥檚 ABiC IV BiCMOS
process
The LMX2305 contains a dual modulus prescaler which can
select either a 64 65 or a 128 129 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
MICROWIRE
TM
interface (Data Enable Clock) Supply volt-
age can range from 2 65V to 5 5V The LMX2305 features
very low current consumption typically 4 0 mA at 2 75V
The LMX2305 is available in a TSSOP 20-pin surface mount
plastic package
Features
Y
Y
Y
Y
Y
Y
RF operation up to 550 MHz
2 65V to 5 5V operation
Low current consumption
I
CC
e
4 0 mA (typ) at V
CC
e
2 75V
Dual modulus prescaler 64 65 or 128 129
Internal balanced low leakage charge pump
Small-outline plastic surface mount TSSOP
0 173 wide package
Applications
Y
Y
Y
Y
Y
Analog Cellular telephone systems
(AMPS ETACS NMT)
Portable wireless communications
(PCS PCN cordless)
Wireless local area networks (WLANs)
Other wireless communication systems
Pagers
Block Diagram
TL W 12459 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 12459
RRD-B30M126 Printed in U S A
http
www national com

LMX2305TMX 產(chǎn)品屬性

  • 2,500

  • 集成電路 (IC)

  • 時(shí)鐘/計(jì)時(shí) - 時(shí)鐘發(fā)生器，PLL，頻率合成器

  • PLLatinum™

  • PLL 頻率合成器

  • 是

  • 時(shí)鐘

  • 時(shí)鐘

  • 1

  • 1:1

  • 是/無

  • 550MHz

  • 是/無

  • 2.65 V ~ 5.5 V

  • -40°C ~ 85°C

  • 表面貼裝

  • 20-TSSOP（0.173"，4.40mm 寬）

  • 20-TSSOP

  • 帶卷 (TR)

  • *LMX2305TMX

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