ICS512
LOCO™ PLL Clock Multiplier
Description
The ICS512 LOCO™ 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.
Stored in the chip’s ROM is the ability to generate
nine different popular multiplication factors,
allowing one chip to output many common
frequencies (see page 2).
Features
• Packaged as 8 pin SOIC or die
• Upgrade of popular ICS502 with:
- changed multiplier table
- higher operating frequencies
• 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 9 selectable frequencies
• Operating voltages of 3.0 to 5.5V
• Industrial temperature version available
• Advanced, low power CMOS process
Block Diagram
VDD GND
S1, S0
2
PLL
Clock
Synthesis
and Control
Circuitry
Output
Buffer
CLK
Crystal or
clock input
X1/ICLK
Crystal
Oscillator
X2
Output
Buffer
REF
Optional crystal capacitors
1
Revision 061900
Printed 11/13/00
Integrated Circuit Systems, Inc. • 525 Race Street • San Jose •CA•95126•(408) 295-9800tel • www.icst.com
MDS 512 C
ICS [ INTEGRATED CIRCUIT SYSTEMS ]
