ICS502
LOCO鈩?PLL Clock Multiplier
Description
The ICS502 LOCO鈩?is the most cost effective
way to generate a high quality, high frequency
clock output and a reference from a low 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鈥檚 ROM is the ability to generate
6 different multiplication factors, allowing one
chip to output many common frequencies (see
page 2).
Features
鈥?Packaged as 8 pin SOIC or die
鈥?ICS鈥?lowest cost PLL clock plus reference
鈥?Zero ppm multiplication error
鈥?Easy to cascade with other 5xx series
鈥?Input crystal frequency of 5 - 27 MHz
鈥?Input clock frequency of 2 - 50 MHz
鈥?Output clock frequencies up to 160 MHz
鈥?Low jitter - 50 ps one sigma
鈥?Compatible with all popular CPUs
鈥?Duty cycle of 45/55 up to 160 MHz
鈥?Operating voltages of 3.0 to 5.5V
鈥?Industrial temperature version available
鈥?25mA drive capability at TTL levels
鈥?Advanced, low power CMOS process
Block Diagram
VDD GND
2
S1, S0
PLL
Clock
Synthesis
and Control
Circuitry
Output
Buffer
CLK
crystal
or clock
X1/ICLK
Crystal
Oscillator
X2
Output
Buffer
REF
MDS 502 D
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Revision 111000
Integrated Circuit Systems, Inc. 鈥?525 Race Street 鈥?San Jose 鈥A鈥?5126鈥?408) 295-9800tel 鈥?www.icst.com
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