DATASHEET
LOCO™ PLL CLOCK GENERATOR
ICS514
Description
Features
TM
The ICS514 LOCO is the most cost effective way to
• Packaged as 8-pin SOIC or die
• Pb (lead) free package
• IDT’s lowest cost PLL clock plus reference
• Produces common computer frequencies
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.
• 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
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.
• 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
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
2
PLL Clock
Synthesis
S1:0
CLK
and Control
Circuitry
X1/ICLK
14.31818 MHz crystal
Crystal
Oscillator
REF
or clock input
X2
GND
Optional crystal capacitors
IDT™ / ICS™ LOCO™ PLL CLOCK GENERATOR
1
ICS514
REV G 051310
IDT [ INTEGRATED DEVICE TECHNOLOGY ]
