DATASHEET
LOCO™ PLL CLOCK MULTIPLIER
ICS502
Description
Features
TM
The ICS502 LOCO is the most cost effective way to
ꢀ Packaged as 8-pin SOIC or die
ꢀ Pb (lead) free package
ꢀ IDT’s lowest cost PLL clock
ꢀ Zero ppm multiplication error
ꢀ Easy to cascade with ICS5xx series
ꢀ Input crystal frequency of 5 – 27 MHz
ꢀ Input clock frequency of 2 – 50 MHz
ꢀ Output clock frequencies up to 190 MHz
ꢀ Low jitter – 50 ps one sigma
ꢀ Compatible with all popular CPUs
ꢀ Duty cycle of 45/55 up to 160 MHz
ꢀ Operating voltages of 3.0 to 5.5 V
ꢀ 25 mA drive capability at TTL levels
ꢀ Industrial temperature version available
ꢀ Advanced, low-power CMOS process
generate a high-quality, high-frequency clock output and a
reference 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.
Stored in the chip’s ROM is the ability to generate six
different multiplication factors, allowing one chip to output
many common frequencies (see table on page 2).
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.
Block Diagram
VDD
PLL Clock
CLK
Multiplier
Circuitry and
ROM
2
S1, S0
X1/ICLK
Crystal or
Clock input
OScillator
X2
Crystal
REF
GND
IDT™ / ICS™ LOCO™ PLL CLOCK MULTIPLIER
1
ICS502
REV M 051310
IDT [ INTEGRATED DEVICE TECHNOLOGY ]
