Integrated Circuit Systems ICS512
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. With a reference output, this chip plus an inexpensive crystal can replace two oscillators.DESCRIPTION
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 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.