ICS512
LOCO™ PLL CLOCK MULTIPLIER
Description
Features
The ICS512 is the most cost effective way to generate
a high-quality, high frequency clock output and a
reference clock 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 200 MHz. With a reference output, this chip plus an
inexpensive crystal can replace two oscillators
• Packaged as 8-pin SOIC or die
• Available in Pb (lead ) free package
• Upgrade of popular ICS502 with:
— changed multiplier table
— higher operating frequncies
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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).
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.
Zero ppm multiplication error
Easy to cascade with other 5xx series
Input crystal frequency of 5 - 27 MHz
Input clock frequency of 2 - 50 MHz
Output clock frequencies up to 200 MHz
Compatible with all popular CPUs
Duty cycle of 45/55 up to 200 MHz
Mask option for nine selectable frequencies
Operating voltages of 3.0 to 5.5 V
Industrial temperature version available
Advanced, low power CMOS process
Block Diagram
VDD
2
S1, S0
X1/ICLK
Crystal or
Clock input
X2
PLL Clock
Synthesis
and Control
Circuitry
Crystal
Oscillator
REF
Optional crystal
capacitors
GND
1
MDS 512 F
I n t e gra te d C i r c u i t S y s t e m s
CLK
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5 25 Race Stre et, San Jo se, CA 9 5126
Revision 070805
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te l (40 8) 2 97-12 01
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w w w. i c st . c o m
