Datasheet > LMX2354SLDX

LMX2354SLDX

更新时间： 2024-02-12 12:37:10

品牌	Logo	应用领域
美国国家半导体 - NSC		信息通信管理
页数	文件大小	规格书
23页	395K
描述
IC PLL FREQUENCY SYNTHESIZER, 2500 MHz, CQCC24, LAMINATE, CSP-24, PLL or Frequency Synthesis Circuit

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LMX2354SLDX 技术参数

是否无铅：	不含铅	生命周期：	Active
零件包装代码：	QFN	包装说明：	TQCCN,
针数：	24	Reach Compliance Code：	unknown
风险等级：	5.66	其他特性：	SELECTABLE PRESCALER OF 16/17 OR 20/21 AND 8/9 OR 12/13
模拟集成电路 - 其他类型：	PLL FREQUENCY SYNTHESIZER	JESD-30 代码：	R-CQCC-N24
JESD-609代码：	e3	长度：	4.5 mm
湿度敏感等级：	1	功能数量：	1
端子数量：	24	最高工作温度：	85 °C
最低工作温度：	-40 °C	封装主体材料：	CERAMIC, METAL-SEALED COFIRED
封装代码：	TQCCN	封装形状：	RECTANGULAR
封装形式：	CHIP CARRIER, THIN PROFILE	峰值回流温度（摄氏度）：	260
认证状态：	COMMERCIAL	座面最大高度：	1.2 mm
最大供电电压 (Vsup)：	5.5 V	最小供电电压 (Vsup)：	2.7 V
标称供电电压 (Vsup)：	3 V	表面贴装：	YES
技术：	BICMOS	温度等级：	INDUSTRIAL
端子面层：	TIN	端子形式：	NO LEAD
端子节距：	0.5 mm	端子位置：	QUAD
处于峰值回流温度下的最长时间：	40	宽度：	3.5 mm
Base Number Matches：	1

LMX2354SLDX 数据手册

August 2001

LMX2354

PLLatinum Fractional N RF/ Integer N IF Dual Low Power

Frequency Synthesizer

LMX2354 2.5 GHz/550 MHz

General Description

Features

n Pin compatible/functional equivalent to the LMX2350

n Enhanced Low Noise Fractional Engine

n 2.7V to 5.5V operation

The LMX2354 is part of a family of monolithic integrated

fractional N/Integer N frequency synthesizers designed to be

used in a local oscillator subsystem for a radio transceiver. It

is fabricated using National’s 0.5 µ ABiC V silicon BiCMOS

process. The LMX2354 contains quadruple modulus pres-

calers along with modulo 15 or 16 fractional compensation

circuitry in the RF divider. The LMX2354 provides a continu-

ous divide ratio of 80 to 32767 in 16/17/20/21

(1.2 GHz–2.5 GHz) fractional mode and 40 to 16383 in

8/9/12/13 (550 MHz–1.2 GHz) fractional mode. The IF cir-

cuitry for the LMX2354 contains an 8/9 prescaler, and is fully

programmable. Using a fractional N phase locked loop tech-

nique, the LMX2354 can generate very stable low noise

control signals for UHF and VHF voltage controlled oscilla-

tors (VCOs).

n Low current consumption

LMX2354: I_CC= 7 mA typical at 3V

n Programmable or logical power down mode:

I_CC= 5 µA typical at 3V

n Modulo 15 or 16 fractional RF N divider supports ratios

of 1, 2, 3, 4, 5, 8, 15, or 16

n Programmable charge pump current levels

RF 100 µA to 1.6 mA in 100 µA steps

IF 100 µA or 800 µA

n Digital filtered lock detect

n Available in 24-pin TSSOP and 24-pin CSP

For the RF PLL, a highly flexible 16 level programmable

charge pump supplies output current magnitudes from 100

µA to 1.6 mA. Two uncommitted CMOS outputs can be used

to provide external control signals, or configured to FastLock

mode. Serial data is transferred into the LMX2354 via a three

wire interface (Data, LE, Clock). Supply voltage can range

from 2.7V to 5.5V. The LMX2354 family features very low

current consumption; typically LMX2354 (2.5 GHz) — 7.0

mA. The LMX2354 are available in a 24-pin TSSOP surface

mount plastic package and 24-pin CSP.

Applications

n Portable wireless communications (PCS/PCN, cordless)

n Dual mode cellular telephone systems

n Zero blind slot TDMA systems

n Spread spectrum communication systems (CDMA)

n Cable TV Tuners (CATV)

Functional Block Diagram

20004801

DS200048

www.national.com

12 3 4 5 6 7...23

中文翻译

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与LMX2354SLDX相关器件

型号	品牌	获取价格	描述	数据表
LMX2354SLDX/NOPB	TI	获取价格	IC,FREQUENCY SYNTHESIZER,BICMOS,LLCC,24PIN,PLASTIC
LMX2354SLEX	ROCHESTER	获取价格	PLL FREQUENCY SYNTHESIZER, 2600 MHz, CQCC24, CSP-24
LMX2354SLEX	NSC	获取价格	IC PLL FREQUENCY SYNTHESIZER, 2600 MHz, CQCC24, CSP-24, PLL or Frequency Synthesis Circuit
LMX2354SLEX/NOPB	TI	获取价格	IC,FREQUENCY SYNTHESIZER,BICMOS,LLCC,24PIN,PLASTIC
LMX2354TM	NSC	获取价格	PLLatinum Fractional N RF/ Integer N IF Dual Low Power Frequency Synthesizer
LMX2354TM/NOPB	TI	获取价格	PLL FREQUENCY SYNTHESIZER, 2500MHz, PDSO24, TSSOP-24
LMX2354TM/NOPB	ROCHESTER	获取价格	PLL FREQUENCY SYNTHESIZER, 2500MHz, PDSO24, TSSOP-24
LMX2354TMX/NOPB	TI	获取价格	PLL FREQUENCY SYNTHESIZER, 2500MHz, PDSO24, TSSOP-24
LMX2355SLB	NSC	获取价格	PLLatinum Fractional N RF/ Integer N IF Dual Low Power Frequency Synthesizer
LMX2355TM	NSC	获取价格	PLLatinum Fractional N RF/ Integer N IF Dual Low Power Frequency Synthesizer

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