Datasheet > ASM3I2531A-08TR

ASM3I2531A-08TR

更新时间： 2024-02-16 07:59:37

品牌	Logo	应用领域
PULSECORE		时钟光电二极管外围集成电路晶体
页数	文件大小	规格书
8页	189K
描述
Clock Generator, 55MHz, CMOS, PDSO8, 4.40 MM, TSSOP-8

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技术参数
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ASM3I2531A-08TR 技术参数

是否Rohs认证：	不符合	生命周期：	Obsolete
包装说明：	4.40 MM, TSSOP-8	Reach Compliance Code：	unknown
风险等级：	5.86	JESD-30 代码：	R-PDSO-G8
JESD-609代码：	e0	长度：	4.4 mm
端子数量：	8	最高工作温度：	70 °C
最低工作温度：		最大输出时钟频率：	55 MHz
封装主体材料：	PLASTIC/EPOXY	封装代码：	TSSOP
封装形状：	RECTANGULAR	封装形式：	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
峰值回流温度（摄氏度）：	NOT SPECIFIED	主时钟/晶体标称频率：	55 MHz
认证状态：	Not Qualified	座面最大高度：	1.1 mm
最大供电电压：	5.5 V	最小供电电压：	2.7 V
标称供电电压：	3.3 V	表面贴装：	YES
技术：	CMOS	温度等级：	COMMERCIAL
端子面层：	TIN LEAD	端子形式：	GULL WING
端子节距：	0.65 mm	端子位置：	DUAL
处于峰值回流温度下的最长时间：	NOT SPECIFIED	宽度：	3 mm
uPs/uCs/外围集成电路类型：	CLOCK GENERATOR, OTHER	Base Number Matches：	1

ASM3I2531A-08TR 数据手册

November 2003

rev 1.0

ASM3P2531A

Features

dependent signals. It allows significant system cost

ꢀ

FCC approved method of EMI attenuation.

savings by reducing the number of circuit board layers

and shielding traditionally required to pass EMI

regulations.

Generates a low EMI spread spectrum of the

input clock frequency.

ꢀ

Optimized for input frequency range between

35MHz – 55MHz.

The ASM3P2531A modulates the output of a single PLL

in order to spread the bandwidth of a synthesized clock,

thereby decreasing the peak amplitudes of its harmonics.

This results in significantly lower system EMI compared

to the typical narrow band signal produced by oscillators

and most clock generators. Lowering EMI by increasing

a signal’s bandwidth is called spread spectrum clock

generation.

Internal loop filter minimizes external

components and board space.

ꢀ

Frequency Deviation: ±1.65%.

Low inherent cycle-to-cycle jitter.

3.3 V or 5 V operating voltage.

CMOS/TTL compatible inputs and outputs.

Ultra low power CMOS design: 5.50 mA @3.3 V.

Supports notebook VGA and other LCD timing

controller applications.

The ASM3P2531A uses the most efficient and optimized

modulation profile approved by the FCC and is

ꢀ

Available in 8-pin SOIC and TSSOP.

implemented by using a proprietary all-digital method.

Product Description

The ASM3P2531A is a versatile spread spectrum

frequency modulator designed specifically for a wide

range of clock frequencies. It reduces electromagnetic

interference (EMI) at the clock source allowing system-

wide reduction of EMI of downstream clock and data

Applications

The ASM3P2531A is targeted toward the notebook VGA

chip and other displays using an LVDS interface, PC

peripheral devices, and embedded systems

Block Diagram

STOP

VDD

PLL

Modulation

CLKIN

Crystal

Oscillator

Frequency

Divider

Output

Divider

Phase

Detector

Loop

Filter

VCO

Feedback

Divider

MODOUT

VSS

Low Frequency EMI Reduction

1 of 8

Notice: The information in this document is subject to change without notice.

12 3 4 5 6 7 8

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与ASM3I2531A-08TR相关器件

型号	品牌	描述	获取价格	数据表
ASM3I2531A-08TT	ALSC	Low Frequency EMI Reduction	获取价格
ASM3I2531A-08TT	PULSECORE	Clock Generator, 55MHz, CMOS, PDSO8, 4.40 MM, TSSOP-8	获取价格
ASM3I2531AF-08SR	PULSECORE	Low Frequency EMI Reduction	获取价格
ASM3I2531AF-08ST	PULSECORE	Low Frequency EMI Reduction	获取价格
ASM3I2531AF-08TR	PULSECORE	Low Frequency EMI Reduction	获取价格
ASM3I2531AF-08TT	PULSECORE	Low Frequency EMI Reduction	获取价格

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