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LOCO PLL CLOCK MULTIPLIER
IDT5V40501
IDT LOCO PLL CLOCK MULTIPLIER
1
IDT5V40501
REV C 102808
Description
The IDT5V40501 LOCOTM is the most cost effective way to
generate a high-quality, high-frequency 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 160 MHz.
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.
The IDT5V40501 is an enhanced performance version of
the ICS501 and ICS501B and should be used for all new
designs.
Features
Packaged as 8-pin SOIC or MSOP
Available in RoHS 5 (green) or RoHS 6 (green and lead
free) compliant packaging
IDT’s lowest cost PLL clock
Zero ppm multiplication error
Input crystal frequency of 5 - 27 MHz
Input clock frequency of 2 - 50 MHz
Output clock frequencies up to 100 MHz
Extremely low jitter of 15 ps (one sigma)
Compatible with all popular CPUs
Duty cycle of 45/55 up to 160 MHz
Nine selectable frequencies
Operating voltage of 3.3 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
Block Diagram
CLK
PLL Clock
M ultiplier
Circuitry
and ROM
Crystal or
Clock input
GND
OE
VDD
Crystal
O scillator
S1:0
X1/ICLK
X2
O ptional crystal capacitors
2
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