DATASHEET
ICS501
LOCO™ PLL CLOCK MULTIPLIER
Description
Features
The ICS501 LOCOTM is the most cost effective way to
generate a high-quality, high-frequency clock output from a
lower frequency crystal or clock input. The name LOCO
stands for Low Cost Oscillator, as it is designed to replace
crystal oscillators in most electronic systems. Using
Phase-Locked Loop (PLL) techniques, the device uses a
standard fundamental mode, inexpensive crystal to
produce output clocks up to 160 MHz.
• Packaged as 8-pin SOIC, MSOP, or die
• Available in RoHS 5 (green) or RoHS 6 (green and lead
free) compliant packaging
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Stored in the chip’s ROM is the ability to generate nine
different multiplication factors, allowing one chip to output
many common frequencies (see table on page 2).
The device also has an output enable pin which tri-states
the clock output when the OE pin is taken low.
This product is intended for clock generation. It has low
output jitter (variation in the output period), but input to
output skew and jitter are not defined or guaranteed. For
applications which require defined input to output skew, use
the ICS570B.
IDT’s lowest cost PLL clock
Zero ppm multiplication error
Input crystal frequency of 5 - 27 MHz
Input clock frequency of 2 - 50 MHz
Output clock frequencies up to 160 MHz
Extremely low jitter of 25 ps (one sigma)
Compatible with all popular CPUs
Duty cycle of 45/55 up to 160 MHz
Nine selectable frequencies
Operating voltage of 3.3 V or 5.0 V
Tri-state output for board level testing
25 mA drive capability at TTL levels
Ideal for oscillator replacement
Industrial temperature version available
Advanced, low-power CMOS process
Block Diagram
VDD
S1:0
2
PLL Clock
Multiplier
Circuitry
and ROM
X1/ICLK
Crystal or
Clock input
Crystal
Oscillator
CLK
X2
Optional crystal capacitors
GND
IDT™ / ICS™ LOCO™ PLL CLOCK MULTIPLIER
1
OE
ICS501
REV P 051507
