DATA SHEET
PRELIMINARY INFORMATION
ICS270
ICS270
Triple PLL Field Programmable
Triple PLL Field Programmable VCXO Clock Synthesizer
VCXO Clock Synthesizer
Description
Features
• Packaged as 20-pin TSSOP
The ICS270 field programmable VCXO clock
synthesizer generates up to eight high-quality,
high-frequency clock outputs including multiple
reference clocks from a low-frequency crystal input. It
is designed to replace crystals and crystal oscillators in
most electronic systems.
• Eight addressable registers
• Replaces multiple crystals and oscillators
• Output frequencies up to 200 MHz at 3.3 V
• Input crystal frequency of 5 to 27 MHz
• Up to eight reference outputs
TM
Using ICS’ VersaClock software to configure PLLs
• Up to two sets of four low-skew outputs
• Operating voltages of 3.3 V
and outputs, the ICS270 contains a One-Time
Programmable (OTP) ROM for field programmability.
Programming features include VCXO, eight selectable
configuration registers and up to two sets of four
low-skew outputs.
• Controllable output drive levels
• Advanced, low-power CMOS process
• Available in Pb (lead) free packaging
Using Phase-Locked Loop (PLL) techniques, the
device runs from a standard fundamental mode,
inexpensive crystal, or clock. It can replace VCXOs,
multiple crystals and oscillators, saving board space
and cost.
The ICS270 is also available in factory programmed
custom versions for high-volume applications.
Block Diagram
3
VDD
CLK1
CLK2
CLK3
CLK4
CLK5
CLK6
CLK7
CLK8
3
OTP
PLL1
PLL2
S2:S0
ROM
with
PLL
Divide
Logic
and
Output
Enable
Control
Values
VIN
PLL3
X1
X2
Voltage
Controlled
Crystal
Crystal
Oscillator
GND
2
External capacitors
are required.
PDTS
IDT™ / ICS™ Triple PLL Field Programmable VCXO Clock Synthesizer
ICS270
Revision 040705
1
MDS 270 B
1
Integrated Circuit Systems, Inc.
● 525 Race Street, San Jose, CA 95126
● tel (408) 297-1201
● www.icst.com
IDT [ INTEGRATED DEVICE TECHNOLOGY ]
