DATASHEET
FIELD PROGRAMMABLE DUAL OUTPUT SS VERSACLOCK SYNTHESIZER
ICS252
Description
Features
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).
• 8-pin SOIC package – Pb-free, RoHS compliant
• 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
™
Using IDT’s VersaClock software to configure the PLL and
output, the ICS252 contains a One-Time Programmable
(OTP) ROM to allow field programmability. Programming
features include 2 selectable configuration registers.
• Operating voltage of 3.3 V
• Replaces multiple crystals and oscillators
• Controllable output drive levels
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.
• Advanced, low-power CMOS process
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.
Block Diagram
VDD
OTP
SEL
PLL1
PLL2
Divide
Logic
and
Output
Enable
Control
ROM
with
CLK1
CLK2
PLL
Values
X1
Crystal
Oscillator
Crystal
X2
GND
External capacitors
are required.
PDTS
IDT® FIELD PROGRAMMABLE DUAL OUTPUT SS VERSACLOCK SYNTHESIZER 1
ICS252
REV K 030212
IDT [ INTEGRATED DEVICE TECHNOLOGY ]
