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ASM3I2531AG-08TR PDF预览

ASM3I2531AG-08TR

更新时间: 2024-11-09 06:38:07
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
8页 340K
描述
Low Frequency EMI Reduction

ASM3I2531AG-08TR 技术参数

生命周期:Obsolete包装说明:4.40 MM, GREEN, TSSOP-8
Reach Compliance Code:unknown风险等级:5.78
Is Samacsys:NJESD-30 代码:R-PDSO-G8
长度:4.4 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: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: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:0.65 mm
端子位置:DUAL宽度:3 mm
uPs/uCs/外围集成电路类型:CLOCK GENERATOR, OTHERBase Number Matches:1

ASM3I2531AG-08TR 数据手册

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February 2007  
rev 1.4  
ASM3P2531A  
Low Frequency EMI Reduction  
Features  
dependent signals. It allows significant system cost  
savings by reducing the number of circuit board layers  
and shielding traditionally required to pass EMI  
regulations.  
FCC approved method of EMI attenuation.  
Generates a low EMI spread spectrum of the  
input clock frequency.  
Optimized for input frequency range between  
27MHz – 55MHz.  
Internal loop filter minimizes external  
components and board space.  
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 result 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.  
Frequency Deviation: ±1.7%.  
Low inherent Cycle-to-cycle jitter.  
3.3 V ± 0.3V Operating Voltage.  
Ultra low power CMOS design:3.0 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  
implemented by using a proprietary all-digital method.  
Available in 8-pin SOIC and TSSOP Packages.  
Product Description  
Applications  
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  
The ASM3P2531A is targeted toward the notebook VGA  
chip and other displays using an LVDS interface, PC  
peripheral devices, and embedded systems.  
Block Diagram  
VDD  
STOP  
PLL  
Modulation  
CLKIN  
Crystal  
Frequency  
Divider  
Oscillator  
Output  
Divider  
Phase  
Loop  
Filter  
VCO  
Detector  
Feedback  
Divider  
ModOUT  
VSS  
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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