MK1707D
Low EMI Clock Generator
Description
The MK1707D generates a low EMI output clock from a
crystal clock input. The part is designed to dither the
LCD interface clock for flat panel graphics controllers.
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 MK1707D offers centered spread from a wide
range of input clock frequencies.
ICS offers many other clocks for computers and
computer peripherals. Consult ICS when you need to
replace multiple crystals and oscillators from your
board.
Features
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Packaged in 8-pin SOIC
Available in Pb (lead) free package
Provides a spread spectrum output clock
Supports flat panel controllers
Accepts a crystal or clock input to provide same
frequency dithered output
MHz
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Input operating frequencies of 25-54 and 50-108
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Peak reduction by 7dB to 14dB typical on 3rd through
19th odd harmonics
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Low EMI feature can be disabled
Includes power down
Operating voltage of 3.3 V
Industrial temperature range available
Advanced, low-power CMOS process
Block Diagram
VDD
S1:0
Low EMI Enable
2
PLL Clock
Synthesis
and Spread
Spectrum
Circuitry
X1/ICLK
Clock Out
Input
Buffer
X2
Load capacitors required
for crystal input
GND
MDS 1707D F
Integrated Circuit Systems, Inc.
●
1
525 Race Street, San Jose, CA 95126
●
Revision 102804
tel (408) 297-1201
●
www.icst.com
ICS [ INTEGRATED CIRCUIT SYSTEMS ]
