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ICS557GI-03LFT 参数 Datasheet PDF下载

ICS557GI-03LFT图片预览
型号: ICS557GI-03LFT
PDF下载: 下载PDF文件 查看货源
内容描述: PCI - Express时钟源 [PCI-EXPRESS CLOCK SOURCE]
分类和应用: PC时钟
文件页数/大小: 9 页 / 226 K
品牌: ICSI [ INTEGRATED CIRCUIT SOLUTION INC ]
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ICS557-03  
PCI-EXPRESS CLOCK SOURCE  
Description  
Features  
The ICS557-03 is a spread spectrum clock generator  
supporting PCI-Express and Ethernet requirements.  
The device is used for PC or embedded systems to  
substantially reduce electromagnetic interference  
(EMI). The device provides two differential (HCSL)  
spread spectrum outputs. This device is pin configured  
to select spread and clock selection. Using ICS’  
patented Phase-Locked Loop (PLL) techniques, the  
device takes a 25 MHz crystal input and produces two  
pairs of differential outputs (HCSL) at 25 MHz, 100  
MHz, 125 MHz and 200 MHz clock frequencies. It also  
provides spread selection of 0.25%, -0.5%, -0.75%,  
and no spread.  
Packaged in 16-pin TSSOP  
Available in Pb (lead) free package  
Supports LVDS Output Levels  
Operating voltage of 3.3 V  
Input frequency of 25 MHz  
Outputs (HCSL, 0.7 V Current mode differential pair)  
Jitter 100 ps (peak-to-peak)  
Spread of 0.25%, -0.5%, -0.75%, and no spread.  
Industrial and commercial temperature ranges  
Block Diagram  
VDD  
2
SS1:SS0  
2
CLK0  
CLK0  
Control  
Logic  
S1:S0  
2
Phase Lock Loop  
CLK1  
CLK1  
X1/ICLK  
Clock  
Buffer/  
25 MHz  
Crystal  
crystal or clock  
Oscillator  
X2  
2
GND  
Optional tuning crystal  
capacitors  
Rr(IREF)  
OE  
MDS 557-03 E  
1
Revision 061005  
Integrated Circuit Systems 525 Race Street, San Jose, CA 95126 tel (408) 297-1201 www.icst.com