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參數(shù)資料
| 型號： | LMX2305 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | PLLatinum 550 MHz Frequency Synthesizer for RF Personal Communications(PLLatinum技術(shù)用于射頻個人通訊的550MHZ頻率合成器) |
| 中文描述： | PLLatinum 550兆赫頻率合成射頻個人通信（PLLatinum技術(shù)用于射頻個人通訊的550MHz的頻率合成器） |
| 文件頁數(shù)： | 1/14頁 |
| 文件大?。?/td> | 228K |
| 代理商： | LMX2305 |
TL/W/12459
L
f
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 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
RF operation up to 550 MHz
Y
2.65V to 5.5V operation
Y
Low current consumption:
I
CC
e
4.0 mA (typ) at V
CC
e
2.75V
Y
Dual modulus prescaler: 64/65 or 128/129
Y
Internal balanced, low leakage charge pump
Y
Small-outline, plastic, surface mount TSSOP,
0.173
×
wide package
Applications
Y
Analog Cellular telephone systems
(AMPS, ETACS, NMT)
Y
Portable wireless communications
(PCS/PCN, cordless)
Y
Wireless local area networks (WLANs)
Y
Other wireless communication systems
Y
Pagers
Block Diagram
TL/W/12459–1
TRI-STATE
é
is a registered trademark of National Semiconductor Corporation.
MICROWIRE
TM
and PLLatinum
TM
are trademarks of National Semiconductor Corporation.
C
1996 National Semiconductor Corporation
RRD-B30M126/Printed in U. S. A.
http://www.national.com
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| LMX2305 WAF | 制造商:Texas Instruments 功能描述: |
| LMX2305C WAF | 制造商:Texas Instruments 功能描述: |
| LMX2305TM | 制造商:Rochester Electronics LLC 功能描述: |
| LMX2305TMX | 功能描述:IC FREQ SYNTH DUAL 20-TSSOP RoHS:否 類別:集成電路 (IC) >> 時鐘/計時 - 時鐘發(fā)生器，PLL，頻率合成器 系列:PLLatinum™ 標準包裝:39 系列:- 類型:* PLL:帶旁路 輸入:時鐘 輸出:時鐘 電路數(shù):1 比率 - 輸入:輸出:1:10 差分 - 輸入:輸出:是/是 頻率 - 最大:170MHz 除法器/乘法器:無/無 電源電壓:2.375 V ~ 3.465 V 工作溫度:0°C ~ 70°C 安裝類型:* 封裝/外殼:* 供應商設(shè)備封裝:* 包裝:* |
| LMX2305WG/B | 制造商:Rochester Electronics LLC 功能描述: |
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