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ASM3I1819NG-08-TR PDF预览

ASM3I1819NG-08-TR

更新时间: 2024-02-25 04:04:00
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
7页 327K
描述
Low Power Mobile VGA EMI Reduction IC

ASM3I1819NG-08-TR 技术参数

是否Rohs认证: 符合生命周期:Obsolete
包装说明:4.40 MM, GREEN, TSSOP-8Reach Compliance Code:unknown
风险等级:5.77Is Samacsys:N
JESD-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:40 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:40 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处于峰值回流温度下的最长时间:NOT SPECIFIED
宽度:3 mmuPs/uCs/外围集成电路类型:CLOCK GENERATOR, VIDEO
Base Number Matches:1

ASM3I1819NG-08-TR 数据手册

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February 2007  
rev 0.3  
ASM3P1819N  
Low Power Mobile VGA EMI Reduction IC  
Features  
The ASM3P1819N reduces electromagnetic interference  
(EMI) at the clock source, allowing a system wide EMI  
reduction for all the down stream clocks and data  
dependent signals. The ASM3P1819N allows significant  
system cost savings by reducing the number of circuit  
board layers, ferrite beads, shielding, and other passive  
components that are traditionally required to pass EMI  
regulations.  
FCC approved method of EMI attenuation  
Provides up to 15dB EMI reduction  
Generates low EMI spread spectrum clock  
a
and a non-spread Reference Clock of the input  
frequency  
Optimized for frequency range from 20MHz to  
40MHz  
Internal loop filter minimizes external components  
and board space  
Down Spread Deviation: -1.25%  
Low inherent Cycle-to-Cycle jitter  
3.3V Operating Voltage  
CMOS/TTL compatible inputs and outputs  
Low power CMOS design  
Supports notebook VGA and other LCD timing  
controller applications  
The ASM3P1819N modulates the output of a single PLL in  
order to “spread” the bandwidth of a synthesized clock,  
thereby decreasing the peak amplitude 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”. The ASM3P1819N  
uses the most efficient and optimized modulation profile  
approved by the FCC and is implemented by using a  
proprietary all digital method  
Power Down function for mobile application  
Products are available for industrial temperature  
range.  
Available in 8 pin SOIC and TSSOP Packages  
Applications  
The ASM3P1819N 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  
system.  
Functional Description  
The ASM3P1819N is  
a
versatile spread spectrum  
frequency modulator designed specifically for a wide range  
of input clock frequencies from 20 to 40MHz. The  
ASM3P1819N can generate an EMI reduced clock from  
crystal, ceramic resonator, or system clock.  
PD#  
VDD  
Block Diagram  
PLL  
Modulation  
XIN  
Crystal  
Frequency  
Divider  
Oscillator  
Output  
Divider  
Loop  
Filter  
Phase  
VCO  
Detector  
Feedback  
Divider  
XOUT  
REF  
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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