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557GI-05A PDF预览

557GI-05A

更新时间: 2024-11-25 07:57:15
品牌 Logo 应用领域
矽成 - ICSI 晶体外围集成电路光电二极管PC时钟
页数 文件大小 规格书
12页 261K
描述
Quad Differential PCI-Express Clock Source

557GI-05A 数据手册

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ICS557-05A  
Quad Differential PCI-Express Clock Source  
Description  
Features  
The ICS557-05A is a spread-spectrum clock generator  
that supports PCI-Express requirements. It is used in  
PC or embedded systems to substantially reduce  
electro-magnetic interference (EMI). The device  
provides four differential HCSL or LVDS high-frequency  
outputs with spread spectrum capability. The output  
frequency and spread type are selectable using  
external pins.  
Packaged in 20-pin TSSOP  
Available in Pb (lead) free package  
Supports PCI-Express applications  
Four differential spread spectrum clock outputs  
Spread spectrum for EMI reduction  
Uses external 25 MHz clock or crystal input  
Power down pin turns off chip  
OE control tri-states outputs  
Spread and frequency selection via external pins  
Spread Bypass option available  
Industrial temperature range available  
Block Diagram  
VDD  
PD  
OE  
2
Spread  
Spectrum/  
Output  
Spread  
Spectrum  
Circuitry  
3
SEL[2:0]  
X1  
clock  
selection  
CLKOUTA  
CLKOUTA  
CLKOUTB  
25 MHz  
crystal or  
clock  
Clock  
Oscillator  
PLL Clock  
Synthesis  
CLKOUTB  
CLKOUTC  
X2  
CLKOUTC  
CLKOUTD  
Optional tuning crystal  
capacitors  
CLKOUTD  
2
Rr(IREF)  
GND  
MDS 557-05A E  
1
Revision 011606  
Integrated Circuit Systems, Inc. 525 Race Street, San Jose, CA 95126 tel (408) 297-1201 www.icst.com  

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