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ICS557G-03LF 参数 Datasheet PDF下载

ICS557G-03LF图片预览
型号: ICS557G-03LF
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: 晶体外围集成电路光电二极管PC时钟
文件页数/大小: 9 页 / 226 K
品牌: ICS [ INTEGRATED CIRCUIT SYSTEMS ]
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ICS557-03
PCI-E
XPRESS
C
LOCK
S
OURCE
Description
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.
Features
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
S1:S0
2
CLK0
Control
Logic
Phase Lock Loop
CLK1
CLK1
CLK0
2
X1/ICLK
25 MHz
crystal or clock X2
Optional tuning crystal
capacitors
Clock
Buffer/
Crystal
Oscillator
2
GND
OE
Rr(IREF)
MDS 557-03 E
I n t e gra te d C i r c u i t S y s t e m s
1
525 Race Stre et, San Jo se, CA 9 5126
Revision 061005
te l (40 8) 2 97-12 01
w w w. i c st . c o m