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525R-02ILF

Description
clock generators & support products pecl input oscar configurable clock
Categorysemiconductor    Other integrated circuit (IC)   
File Size89KB,9 Pages
ManufacturerIDT (Integrated Device Technology, Inc.)
Websitehttp://www.idt.com/
Environmental Compliance  
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clock generators & support products pecl input oscar configurable clock

DATASHEET
USER CONFIGURABLE CLOCK
Description
The ICS525-01/02 are the most flexible way to generate
a high-quality, high-accuracy, high-frequency clock
output from an inexpensive crystal or clock input. The
user can configure the device to produce nearly any
output frequency from any input frequency by
grounding or floating the select pins. Neither
microcontroller, software, nor device programmer are
needed to set the frequency. Using Phase-Locked Loop
(PLL) techniques, the device accepts a standard
fundamental mode, inexpensive crystal to produce
output clocks up to 250 MHz. It can also produce a
highly accurate output clock from a given input clock,
keeping them frequency locked together.
For similar capability with a serial interface, use the
ICS307. For simple multipliers to produce common
frequencies, refer to the ICS50x family of parts, which
are smaller and more cost effective.
These products are intended for clock generation. They
have low output jitter (variation in the output period), but
input to output skew and jitter are not defined nor
guaranteed. For applications which require defined
input to output timing, use the ICS527-01.
ICS525-01/02
Features
Packaged as 28-pin SSOP (150 mil body)
Industrial and commercial versions available in Pb
(lead) free package
User determines the output frequency by setting all
internal dividers
Eliminates need for custom oscillators
No software needed
Online calculator determines register settings
Pull-ups on all select inputs
Input crystal frequency of 5 - 27 MHz
Input clock frequency of 2 - 50 MHz
Very low jitter
Duty cycle of 45/55 up to 200 MHz
Operating voltage of 3.0 V or 5.5 V
Ideal for oscillator replacement
Industrial temperature version available
For Zero Delay, refer to the ICS527
Block Diagram
2
PD
X1/ICLK
Crystal or clock
input
Crystal
Oscillator
X2
VCO
Divider
Reference
Divider
Phase Comparator,
Charge Pump, and
Loop Filter
CLK
VCO
Output
Divider
REF
VDD
Optional crystal capacitors
7
R6:R0
9
V8:V0
2
GND
3
S2:S0
IDT®
USER CONFIGURABLE CLOCK
1
ICS525-01/02
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