ICS514

www.DataSheet4U.com ICS514 LOCO™ PLL Clock Generator Features Packaged as 8 pin SOIC ICS’ lowest cost PLL clock plus reference Produces common computer frequencies Input crystal frequency typically 14.3182 MHz Output clock frequencies up to 66.66 MHz Low jitter - 40 ps one sigma Compatible with all popular CPUs Duty cycle of 45/55 Custom frequencies available Operating voltages of 3.0 to 5.5 V Power down mode turns off chip 25mA drive capability at TTL levels Advanced, low power CMOS process Description The ICS514 LOCO™ is the most cost effective way to generate a high quality, high frequency clock output from a 14.31818 MHz crystal or clock input. The name LOCO stands for LOw Cost Oscillator, as it is designed to replace crystal oscillators in many electronic systems. Using Phase-Locked-Loop (PLL) techniques, the device uses a standard, inexpensive crystal to produce output clocks up to 66.66 MHz. Stored in the chip’s ROM is the ability to generate 5 different output frequencies, allowing one chip to work in different speed processor systems. The device also has a power down mode that turns off the clock outputs when both select pins are low. In this mode, the internal PLL is not running. Block Diagram VDD GND 2 S1, S0 PLL Clock Synthesis and Control Circuitry Output Buffer CLK 14.31818 MHz crystal or clock X1/ICLK Crystal Oscillator X2 Output Buffer REF Optional crystal capacitors 1 Revision 080699 Printed 11/13/00 Integrated Circuit Syste...