MK1726-01A
Low EMI Clock Generator
Description
Features
The MK1726-01A generates a low EMI output clock
from a clock or crystal input. The part is designed to
dither the LCD interface clock for PDAs, printers,
scanners, modems, copiers, and others. Using ICS’
proprietary mix of analog and digital Phase-Locked
Loop (PLL) technology, the device spreads the
frequency spectrum of the output, reducing the
frequency amplitude peaks by several dB. The
MK1726-01A offers both centered and down spread
from a high-speed clock input.
• Packaged in 8-pin SOIC/TSSOP
• Provides a spread spectrum output clock
• Supports flat panel controllers
• Accepts a clock or crystal input (provides same
frequency dithered output)
• Input frequency range of 4 to 32 MHz
• Output frequency range of 4 to 32 MHz
• Center and down spread
• Peak reduction by 8 dB to 16 dB typical on 3rd
ICS offers many other clocks for computers and
computer peripherals. Consult us when you need to
remove crystals and oscillators from your board.
through 19th odd harmonics
• Low EMI feature can be disabled
• Includes power down
• Operating voltage of 3.3 V
• Advanced, low-power CMOS process
Block Diagram
VDD
2
S1:0
Spread Direction
FRSEL
PLL Clock
Synthesis
and Spread
Spectrum
Circuitry
SSCLK
X1/CLK
X1
Clock Buffer/
Crystal
Ocsillator
X2
External caps required for with crystal
for accurate tuning of the clock
GND
MDS 1726-01A B
1
Revision 120303
Integrated Circuit Systems, Inc. ● 525 Race Street, San Jose, CA 95126 ● tel (408) 297-1201 ● www.icst.com