MK1725 Datasheet, PDF (1/6 Pages) Integrated Circuit Systems – Quad Output Spread Spectrum Clock Generator

MK1725
Quad Output Spread Spectrum Clock Generator
Description
The MK1725 generates 4 high-quality, high-frequency
spread spectrum clock outputs. It is designed to
replace spread spectrum clock generators and a buffer
in many digital consumer applications. Using ICS’
patented Phase Locked Loop (PLL) techniques, the
device runs from a lower frequency clock or crystal
input.
The MK1725 has a 16 location ROM table which
provides maximum flexibility for system designers. The
chip also has a power down pin which can be used to
reduce power.
Features
• Packaged in 16-pin TSSOP
• Available in Pb (lead) free package
• Replaces a spread spectrum clock generator and a
buffer
• Input clock or crystal frequency of 20-34 MHz
• Output frequency of 20-136 MHz
• Four spread spectrum clock outputs
• Duty cycle of 45/55
• Operating voltage of 3.3 V
• Advanced, low power CMOS process
Block Diagram
VDD
3
4
S3:0
X1/ICLK
20-34 MHz
crystal or
clock
X2
Optional crystal
capacitors.
Crystal
Oscillator
PLL/Clock
Synthesis
and
Spread
Spectrum
Circuitry
GND ³
PDTS
4
CLK1:4
MDS 1725 C
1
Revision 021605
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