DATASHEET
LOCO™ PLL CLOCK MULTIPLIER
ICS501B
Description
Features
TM
The ICS501B LOCO is the most cost effective way to
• Packaged as 8 pin SOIC or die
• Available in Pb (lead) free package
• IDT’s lowest cost PLL clock
generate a high-quality clock output 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 15
MHz.
• Zero ppm multiplication error
• Output clock frequencies up to 15 MHz
• Extremely low jitter of 25 ps (one sigma)
• Compatible with popular CPUs
• Duty cycle of 45/55 up to 20 MHz
• Nine selectable frequencies
• Operating voltage of 3.3 V or 5.5 V
• Tri-state output for board level testing
• 25 mA drive capability at TTL levels
• Ideal for oscillator replacement
• Industrial temperature version available
• Advanced, low-power CMOS process
Stored in the chip’s ROM is the ability to generate nine
different multiplication factors, allowing one chip to
output many common frequencies (see table on page
2).
The device also has an output enable pin which
tri-states the clock output when the OE pin is taken low.
This product is intended for clock generation. It has low
output jitter (variation in the output period), but input to
output skew and jitter are not defined or guaranteed.
For applications which require defined input to output
skew, use the ICS570B.
NOTE: EOL for non-green parts to occur on
5/13/10 per PDN U-09-01
Block Diagram
VDD
2
S1:0
PLL Clock
Multiplier
Circuitry
and ROM
X1/ICLK
CLK
Crystal or
Clock input
Crystal
Oscillator
X2
Optional crystal capacitors
OE
GND
IDT™ / ICS™ LOCO™ PLL CLOCK MULTIPLIER
1
ICS501B
REV E 092209
IDT [ INTEGRATED DEVICE TECHNOLOGY ]
