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參數資料
| 型號： | LMX2337 |
| 廠商： | National Semiconductor Corporation |
| 英文描述： | PLLatinum Dual Frequency Synthesizer for RF Personal Communications(PLLatinum技術用于射頻個人通訊的雙通道頻率合成器) |
| 中文描述： | PLLatinum雙頻率合成射頻個人通信（PLLatinum技術用于射頻個人通訊的雙通道頻率合成器） |
| 文件頁數： | 1/17頁 |
| 文件大小： | 392K |
| 代理商： | LMX2337 |
LMX2335/LMX2336/LMX2337
PLLatinum
Dual Frequency Synthesizer for RF
Personal Communications
LMX2335
LMX2336
LMX2337
1.1 GHz/1.1 GHz
2.0 GHz/1.1 GHz
550 MHz/550 MHz
General Description
The LMX2335, LMX2336 and LMX2337 are monolithic, inte-
grated dual frequency synthesizers, including two high fre-
quency prescalers, and are designed for applications requir-
ing two RF phase-lock loops. They are fabricated using
National’s ABiC IV silicon BiCMOS process.
The LMX2335/36/37 contains two dual modulus prescalers.
A 64/65 or a 128/129 prescaler can be selected for each RF
synthesizer. A second reference divider chain is included in
the IC for improved system noise. LMX2335/36/37, which
employ a digital phase locked loop technique, combined with
a high quality reference oscillator and loop filters, provide the
tuning voltages for voltage controlled oscillators to generate
very stable low noise RF local oscillator signals.
Serial data is transferred into the LMX2335/36/37 via a three
wire interface (Data, Enable, Clock). Supply voltage can
range from 2.7V to 5.5V. The LMX2335/36/37 feature very
low current consumption; LMX2335/37 10 mA at 3V,
LMX2336 13 mA at 3V. The LMX2335/37 are available in
both a JEDEC SO and TSSOP 16-pin surface mount plastic
package. The LMX2336 is available in a TSSOP 20-pin sur-
face mount plastic package.
Features
n
2.7V to 5.5V operation
n
Low current consumption
n
Selectable powerdown mode:
I
CC
= 1 μA (typ)
n
Dual modulus prescaler: 64/65 or 128/129
n
Selectable charge pump TRI-STATE
mode
n
Selectable charge pump current levels
n
Selectable FastLock
mode
Applications
n
Cellular telephone systems (AMPS, ETACS, RCR-27)
n
Cordless telephone systems (DECT, ISM, PHS, CT-1+)
n
Personal Communication Systems
(DCS-1800, PCN-1900)
n
Dual Mode PCS phones
n
CATV
n
Other wireless communication systems
Functional Block Diagram
TRI-STATE
is a registered trademark of National Semiconductor Corporation.
Fastlock
, MICROWIRE
and PLLatinum
are trademarks of National Semiconductor Corporation.
DS012332-1
September 1996
L
C
2000 National Semiconductor Corporation
DS012332
www.national.com
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| LMX2350TM | PLLatinum⑩ Fractional N RF / Integer N IF Dual Low Power Frequency Synthesizer |
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相關代理商/技術參數 |
參數描述 |
|---|---|
| LMX2337M | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:PLLatinum⑩ Dual Frequency Synthesizer for RF Personal Communications |
| LMX2337MX | 功能描述:IC FREQ SYNTH DUAL 1.1GHZ 16SOIC RoHS:否 類別:集成電路 (IC) >> 時鐘/計時 - 時鐘發生器，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: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:* 供應商設備封裝:* 包裝:* |
| LMX2337TM | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:PLLatinum⑩ Dual Frequency Synthesizer for RF Personal Communications |
| LMX2337TMX | 功能描述:IC FREQ SYNTH DL 1.1GHZ 16-TSSOP RoHS:否 類別:集成電路 (IC) >> 時鐘/計時 - 時鐘發生器，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: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:* 供應商設備封裝:* 包裝:* |
| LMX233XA | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:PLLatinum⑩ Dual Frequency Synthesizer for RF Personal Communications |
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