Datasheet > 微控制器和处理器 > 时钟发生器> ASM3I2508AG-08SR

ASM3I2508AG-08SR

更新时间： 2024-01-08 07:09:54

品牌	Logo	应用领域
PULSECORE		晶体时钟发生器微控制器和处理器外围集成电路光电二极管
页数	文件大小	规格书
9页	396K
描述
Peak EMI Reducing Solution

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技术参数
数据手册

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ASM3I2508AG-08SR 技术参数

生命周期：	Obsolete	包装说明：	0.150 INCH, GREEN, SOIC-8
Reach Compliance Code：	unknown	风险等级：	5.77
Is Samacsys：	N	JESD-30 代码：	R-PDSO-G8
长度：	4.9 mm	端子数量：	8
最高工作温度：	85 °C	最低工作温度：	-40 °C
最大输出时钟频率：	120 MHz	封装主体材料：	PLASTIC/EPOXY
封装代码：	SOP	封装形状：	RECTANGULAR
封装形式：	SMALL OUTLINE	主时钟/晶体标称频率：	14.31818 MHz
认证状态：	Not Qualified	座面最大高度：	1.75 mm
最大供电电压：	3.6 V	最小供电电压：	3 V
标称供电电压：	3.3 V	表面贴装：	YES
技术：	CMOS	温度等级：	INDUSTRIAL
端子形式：	GULL WING	端子节距：	1.27 mm
端子位置：	DUAL	宽度：	3.91 mm
uPs/uCs/外围集成电路类型：	CLOCK GENERATOR, OTHER	Base Number Matches：	1

ASM3I2508AG-08SR 数据手册

February 2007

rev 1.4

ASM3P2508A

Peak EMI Reducing Solution

Features

The ASM3P2508A allows significant system cost savings

by reducing the number of circuit board layers and

shielding that are required to pass EMI regulations. The

ASM3P2508A modulates the output of 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.

•

Generates an EMI optimized clocking signal at

output.

•

Input frequency – 14.31818MHz.

Frequency outputs:

•

120MHz (modulated) - default.

72MHz (modulated) or 48MHz (modulated)

selectable via I2C

•

± 1% Centre spread.

Modulation rate: 40KHz.

Byte Write via I2C

Supply voltage range 3.3V ± 0.3V.

Available in 8-pin SOIC Package.

Available in Commercial and Industrial

Temperature ranges.

The ASM3P2508A has a feature to power down the

72MHz/48MHz output by writing data into specific

registers in the device via I2C. By writing a ‘0’ into bit 1 of

Byte 0, the PLL block generating 72MHz / 48MHz can be

powered down. Writing ‘0’ into bit ‘7’ of Byte 1 selects an

output of 72 MHz on FOUT2CLK while a ‘1’ at the same

location selects a 48 MHz clock output. However, the I2C

block, crystal oscillator, and the PLL block generating

120MHz would be always running.

Product Description

The ASM3P2508A is

a versatile spread spectrum

frequency modulator. The ASM3P2508A reduces

electromagnetic interference (EMI) at the clock source.

Block Diagram

V_DD

XIN

XOUT

Crystal

PLL 1

Oscillator

FOUT1CLK

(120MHz)

SCL

SDA

I2C

PLL 2

FOUT2CLK

Interface

(72 MHz / 48MHz)

V_SS

PulseCore Semiconductor Corporation

1715 S. Bascom Ave Suite 200, Campbell, CA 95008 • Tel: 408-879-9077 • Fax: 408-879-9018

www.pulsecoresemi.com

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

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与ASM3I2508AG-08SR相关器件

型号	品牌	描述	获取价格	数据表
ASM3I2508AG-08ST	PULSECORE	Peak EMI Reducing Solution	获取价格
ASM3I2508SP-08SR	ALSC	Clock Synthesizer and Frequency Generator with Peak EMI reduction	获取价格
ASM3I2508SP-08SR	PULSECORE	Clock Generator, 33.33MHz, CMOS, PDSO8, 0.150 INCH, SOIC-8	获取价格
ASM3I2508SP-08ST	ALSC	Clock Synthesizer and Frequency Generator with Peak EMI reduction	获取价格
ASM3I2508SP-08ST	PULSECORE	Clock Generator, 33.33MHz, CMOS, PDSO8, 0.150 INCH, SOIC-8	获取价格
ASM3I2508SPF-08SR	ALSC	Clock Synthesizer and Frequency Generator with Peak EMI reduction	获取价格

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