ICS180-03
Low EMI Clock Generator
Description
Features
The ICS180-03 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.
• Pin and function compatible to Cypress W180-03
• Packaged in 8-pin SOIC
• Provides a spread spectrum output clock
• Accepts a clock input and provides same frequency
dithered output
• Input frequency of 15 to 28 MHz
The ICS180-03 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.
• 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
ICS offers a complete line of EMI reducing clock
generators. Consult us when you need to remove
crystals and oscillators from your board.
• Advanced, low-power CMOS process
Block Diagram
VDD
FS1
SSON#
PLL Clock
Synthesis
SS%
and Spread
Spectrum
Circuitry
CLK
X1/CLKIN
Clock Buffer/
Crystal
Oscillator
X2
GND
MDS 180-03 A
1
Revision 110404
Integrated Circuit Systemsl525 Race Street, San Jose, CA 95126 l tel (408) 297-1201 l www.icst.com
ICSI [ INTEGRATED CIRCUIT SOLUTION INC ]
