MK1725 Datasheet, PDF (1/8 Pages) Integrated Circuit Systems – Quad Output Spread Spectrum Clock Generator

QUAD OUTPUT SPREAD SPECTRUM CLOCK GENERATOR
DATASHEET
MK1725
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 IDT’s 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
• Available in Commercial (0 to +70°C) and Industrial (-40
to +85°C) temperature ranges
Block Diagram
4
S3:0
X1/ICLK
20-34 MHz
crystal or
clock
X2
Optional crystal
capacitors.
VDD
3
Crystal
Oscillator
PLL/Clock
Synthesis
and
Spread
Spectrum
Circuitry
GND ³
PDTS
4
CLK1:4
IDT™ QUAD OUTPUT SPREAD SPECTRUM CLOCK GENERATOR
1
MK1725
REV G 033109