ICS511
LOCO
TM
PLL C
LOCK
M
ULTIPLIER
Description
The ICS511 LOCO
TM
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 200
MHz.
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 nor guaranteed.
For applications which require defined input to output
skew, use the ICS570B.
Features
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Packaged as 8-pin SOIC or die
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Available in Pb (lead) free package
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Upgrade of popular ICS501 with:
- changed multiplier table
- faster operating frequencies
- output duty cycle at VDD/2
Zero ppm multiplication error
Input crystal frequency of 5 - 27 MHz
Input clock frequency of 2 - 50 MHz
Output clock frequencies up to 200 MHz
Extremely low jitter of 25 ps (one sigma)
Compatible with all popular CPUs
Duty cycle of 45/55 up to 200 MHz
Mask option for nine selectable frequencies
Operating voltage of 3.3 V or 5 V
Tri-state output for board level testing
Industrial temperature version available
Advanced, low power CMOS process
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Block Diagram
VDD
S1:0
X1/ICLK
Crystal or
Clock input
X2
2
Crystal
Oscillator
PLL Clock
Multiplier
Circuitry
and ROM
CLK
Optional crystal capacitors
GND
OE
MDS 511 G
I n t e gra te d C i r c u i t S y s t e m s
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1
5 25 Race Stre et, San Jo se, CA 9 5126
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Revision 102504
te l (40 8) 2 97-12 01
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w w w. i c st . c o m
ICS [ INTEGRATED CIRCUIT SYSTEMS ]
