ICS502
LOCO™ PLL Clock Multiplier
Description
The ICS502 LOCO™ 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’s ROM is the ability to generate
6 different multiplication factors, allowing one
chip to output many common frequencies (see
page 2).
Features
• Packaged as 8 pin SOIC or die
• ICS’ lowest cost PLL clock plus reference
• 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 160 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 5.5V
• Industrial temperature version available
• 25mA drive capability at TTL levels
• 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
1
Revision 111000
Integrated Circuit Systems, Inc. • 525 Race Street • San Jose •CA•95126•(408) 295-9800tel • www.icst.com
ICS [ INTEGRATED CIRCUIT SYSTEMS ]
