ICS252
Field Programmable Dual Output SS VersaClock Synthesizer
Description
The ICS252 is a low cost, dual-output, field
programmable clock synthesizer. The ICS252 can
generate two output frequencies from 314 kHz to 200
MHz using up to two independently configurable PLLs.
The outputs may employ Spread Spectrum techniques
to reduce system electro-magnetic interference (EMI).
Using ICS’ VersaClock
™
software to configure the PLL
and output, the ICS252 contains a One-Time
Programmable (OTP) ROM to allow field
programmability. Programming features include 4
selectable configuration registers.
The device employs Phase-Locked Loop (PLL)
techniques to run from a standard fundamental mode,
inexpensive crystal, or clock. It can replace multiple
crystals and oscillators, saving board space and cost.
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.
The ICS252 is also available in factory programmed
custom versions for high-volume applications.
Features
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8-pin SOIC package
Two addressable registers
Input crystal frequency of 5 to 27 MHz
Clock input frequency of 3 to 150 MHz
Output clock frequencies up to 200 MHz
Configurable Spread Spectrum Modulation
Operating voltage of 3.3 V
Replaces multiple crystals and oscillators
Controllable output drive levels
Advanced, low-power CMOS process
Available in Pb (lead) free packaging
Block Diagram
VDD
SEL
OTP
ROM
with
PLL
Values
PLL1
Divide
Logic
and
Output
Enable
Control
CLK1
CLK2
PLL2
X1
Crystal
X2
External capacitors
are required.
GND
Crystal
Oscillator
PDTS
MDS 252 B
Integrated Circuit Systems, Inc.
●
1
525 Race Street, San Jose, CA 95126
●
Revision 011606
tel (408) 297-1201
●
www.icst.com
IDT [ INTEGRATED DEVICE TECHNOLOGY ]
