LOCO™ PLL CLOCK GENERATOR
DATASHEET
ICS514
Description
The ICS514 LOCOTM 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 most 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 five
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
Features
• Packaged as 8-pin SOIC or die
• Pb (lead) free package
• IDT’s 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 from a
14.3182 MHz crystal or input clock
• Low jitter of 50 ps (one sigma)
• Compatible with all popular CPUs
• Duty cycle of 45/55
• Custom frequencies available
• Operating voltage of 3.3 V to 5.5 V
• Power-down mode turns off chip
• 25 mA drive capability at TTL levels
• Advanced, low-power CMOS process
VDD
S1:0 2
X1/ICLK
14.31818 MHz crystal
or clock input
X2
Crystal
Oscillator
Optional crystal capacitors
PLL Clock
Synthesis
and Control
Circuitry
GND
CLK
REF
IDT™ / ICS™ LOCO™ PLL CLOCK GENERATOR
1
ICS514
REV G 051310
