ICS331-26
Single Output Clock Synthesizer
Description
The ICS331-26 is a low cost frequency generator that
is factory programmable. Using analog/digital
Phase-Locked-Loop (PLL) techniques, the device
accepts a 24 MHz clock input to produce selectable
output clocks of 48 MHz and 72 MHz.
The device also has a power down feature that
tri-states the clock outputs and turns off the PLLs when
the PDTS pin is taken low.
Features
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8-pin SOIC package – Pb-free, RoHS compliant
Input clock frequency of 24 MHz
Selectable output clocks of 48 MHz or 72 MHz
Spread spectrum
Duty cycle of 45/55
Operating voltage of 3.3 V
Advanced, low power CMOS process
Block Diagram
VDD
S1:0
2
OTP
ROM with
PLL
Divider
Values
24 MHz Crystal
or Clock
X1
Crystal
Oscillator
X2
PLL Clock
Synthesis
and Control
Circuitry
CLK
Optional crystal capacitors
GND
PDTS (both outputs and PLL)
MDS 331-26 E
1
Integrated Device Technology, Inc.
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Revision 051310
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IDT [ INTEGRATED DEVICE TECHNOLOGY ]
