ICS18001 Datasheet, PDF (1/7 Pages) Integrated Circuit Systems – Low EMI Clock Generator

ICS180-01
Low EMI Clock Generator
Description
The ICS180-01 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 ICS180-01 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 W180-01
• Packaged in 8-pin SOIC
• Provides a spread spectrum output clock
• Accepts a clock input and provides same frequency
dithered output
• Input frequency of 8 to 28 MHz
• 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
• Advanced, low-power CMOS process
• Available in Pb (lead) free package
• Industrial temperature range available
Block Diagram
VDD
FS2:1
SS%
X1/CLKIN
X2
Clock Buffer/
Crystal
Oscillator
PLL Clock
Synthesis
and Spread
Spectrum
Circuitry
CLK
GND
MDS 180-01 B
1
Revision 050405
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