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525R-02IT

OSCaR™ User Configurable Clock

Integrated Device Technology 

ICS525-01/02

OSCaRTM 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 name OSCaR stands for OSCillator Replacement,

as they are designed to replace crystal oscillators in

almost any electronic system. 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 LOCOTM family of parts, which

are smaller and more cost effective.

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 nor guaranteed.

For applications which require defined input to output

timing, use the ICS527-01.

Features

• Packaged as 28-pin SSOP (150 mil body)

• Industrial and commercial versions available in Pb

(lead) free package

• ICS525-01 with output frequencies up to 160 MHz

• ICS525-02 with output frequencies up to 250 MHz

• User determines the output frequency by setting all

internal dividers

• Eliminates need for custom oscillators

• No software needed

• Online ICS525 calculator at

www.icst.com/products/ics525inputForm.html

• 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

NOTE: EOL for non-green parts to occur on

5/13/10 per PDN U-09-01

Block Diagram

PD

X1/ICLK

Crystal or clock

input

X2

Optional crystal capacitors

Crystal

Oscillator

Reference

Divider

7

R6:R0

2 VDD

Phase Comparator,

Charge Pump, and

VCO

Loop Filter

VCO

Divider

9

2 GND

V8:V0

Output

Divider

3

S2:S0

CLK

REF

MDS 525-01/02 R

1

Integrated Device Technology, Inc. ● www.idt.com

Revision 021710

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