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ASM3P1819FST PDF预览

ASM3P1819FST

更新时间： 2024-11-25 15:28:03
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 253K
描述
Clock Generator, 40MHz, CMOS, PDSO8, SOIC-8

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中文翻译

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ASM3P1819FST 技术参数

是否Rohs认证： 符合生命周期：Obsolete
包装说明：SOIC-8Reach Compliance Code：unknown
风险等级：5.75JESD-30 代码：R-PDSO-G8
长度：4.92 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：40 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峰值回流温度（摄氏度）：NOT SPECIFIED
主时钟/晶体标称频率：40 MHz认证状态：Not Qualified
座面最大高度：1.8 mm标称供电电压：3.3 V
表面贴装：YES技术：CMOS
温度等级：COMMERCIAL端子形式：GULL WING
端子节距：1.27 mm端子位置：DUAL
处于峰值回流温度下的最长时间：NOT SPECIFIED宽度：3.95 mm
uPs/uCs/外围集成电路类型：CLOCK GENERATOR, OTHERBase Number Matches：1

ASM3P1819FST 数据手册

 浏览型号ASM3P1819FST的Datasheet PDF文件第2页浏览型号ASM3P1819FST的Datasheet PDF文件第3页浏览型号ASM3P1819FST的Datasheet PDF文件第4页浏览型号ASM3P1819FST的Datasheet PDF文件第5页浏览型号ASM3P1819FST的Datasheet PDF文件第6页浏览型号ASM3P1819FST的Datasheet PDF文件第7页 
October 2003  
rev 1.0  
ASM3P1819A-H  
Peak Reducing EMI Solution  
Features  
•
Eight Spread % Selections:  
•
FCC approved method of EMI  
o
± 0.625% to –3.5%.  
attenuation.  
•
•
3.3V operating voltage.  
•
•
Provides up to 15dB EMI reduction.  
Generates a low EMI spread spectrum  
clock and a non-spread reference clock  
of the input frequency.  
CMOS/TTL compatible inputs and  
outputs.  
•
•
Low-power CMOS design.  
Supports notebook VGA and other LCD  
timing controller applications.  
Power down function for mobile  
application.  
•
•
•
•
Optimized for frequency range from  
20MHz to 40MHz.  
•
•
•
Internal loop filter minimizes external  
components and board space.  
Selectable spread options: Down and  
Center Spread.  
Products are available for industrial  
temperature range.  
Available in 8-pin SOIC and TSSOP  
packages.  
Low inherent cycle-to-cycle jitter.  
The ASM3P1819x 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.  
Product Description  
The ASM3P1819x is  
a
versatile spread  
spectrum  
frequency  
modulator designed  
specifically for input clock frequencies from  
20MHz to 40MHz. The ASM3P1819x can  
generate an EMI reduced clock form an OSC or  
a system-generated clock. The ASM3P1819x  
offers Down and Center spread options with  
different percentage deviations. (Refer Spread  
Deviation Selections Table.)  
The ASM3P1819x uses the most efficient and  
optimized modulation profile approved by the  
FCC and is implemented by using a proprietary  
all-digital method.  
The ASM3P1819x reduces electromagnetic  
interference (EMI) at the clock source, allowing  
system wide reduction of EMI of down stream  
clock and data dependent signals. The  
ASM3P1819x allows significant system cost  
savings by reducing the number of circuit board  
layers and shielding that are traditionally  
required to pass EMI regulations.  
Applications  
The ASM3P1819x is targeted towards EMI  
management for memory and LVDS interfaces  
in mobile graphic chipsets and high-speed digital  
applications such as PC peripheral devices,  
consumer electronics, and embedded controller  
systems.  
Alliance Semiconductor  
2595, Augustine Drive • Santa Clara • CA 95054 • Tel 408 855 4900 • Fax 408 855 4999 • www.alsc.com  
Notice: The information in this document is subject to change without notice.  
12345678

中文翻译

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