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181MI-01

Description
Low EMI Clock Generator
File Size87KB,7 Pages
ManufacturerICS ( IDT )
Websitehttp://www.icst.com
Download Datasheet View All

181MI-01 Overview

Low EMI Clock Generator

ICS181-01
Low EMI Clock Generator
Description
The ICS181-01 generates a low EMI output clock from
a clock or crystal input. The device uses ICS’
proprietary mix of analog and digital Phase-Locked
Loop (PLL) technology to spread the frequency
spectrum of the output, thereby reducing the frequency
amplitude peaks by several dB.
The ICS181-01 offers down spread selection of -1.25%
and -3.75%. Refer to the MK1714-01/02 for the widest
selection of input frequencies and multipliers.
ICS offers a complete line of EMI reducing clock
generators. Consult us when you need to remove
crystals and oscillators from your board.
Features
Pin and function compatible to Cypress W181-01
Packaged in 8-pin SOIC
Provides a spread spectrum output clock
Accepts a clock input and provides same frequency
dithered output
Input frequency of 28 to 75 MHz for Clock input
Peak reduction by 7dB - 14dB typical on 3rd - 19th
odd harmonics
Spread percentage selection for -1.25% and -3.75%
Operating voltage of 3.3 V and 5 V
Available in Pb (lead) free package
Industrial temperature range available
Advanced, low-power CMOS process
Block Diagram
VDD
FS2:1
SS%
PLL Clock
Synthesis
and Spread
Spectrum
Circuitry
CLK
X1/CLKIN
X2
Clock Buffer/
Crystal
Oscillator
GND
MDS 181-01 B
1
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Revision 050405
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