MDS 300QT E

1

Revision 111000

Integrated Circuit Systems, Inc. • 525 Race Street • San Jose •CA•95126•(408) 295-9800tel• www.icst.com

ICS300/ICS301/ICS302

QTClock™ Quick Turn Clock Synthesizer

• Packaged as 8 pin SOIC

• Quick turn frequency programming allows

samples in one to three days

• Replaces nearly any crystal or oscillator

• ICS300 produces up to 100 MHz at 3.3V,

ICS301 produces up to 200 MHz at 3.3V

ICS302 accepts up to 125 MHz clock input

• Easy to cascade with ICS5xx series

• Input crystal frequency of 5 - 27 MHz

• Input clock frequency of 2 - 125 MHz

• Low jitter - 50 ps one sigma

• Compatible with all popular CPUs

• Duty cycle of 45/55

• Operating voltages of 3.0 to 5.5V

• Full CMOS level outputs with 25mA drive

capability at TTL levels

• Tri-state output + PLL power down pin

• Advanced, low power CMOS process

The ICS300 and ICS301 QTClocks™ generate a

high quality, high frequency clock output and a

reference from a low frequency crystal or clock

input. They are designed to replace crystals and

crystal oscillators in most electronic systems. The

ICS302 can accept a higher frequency clock input

to generate up to 200 MHz. The devices contain a

One Time Programmable (OTP) ROM which is

factory programmed with the PLL divider values

to output a broad range of frequencies, from 6 to

200 MHz, allowing customer requests for different

frequencies to be shipped in 1-3 days. Using

Phase-Locked-Loop (PLL) techniques, the devices

run from a standard fundamental mode,

inexpensive crystal, or clock. They are smaller and

less expensive than one oscillator.

Block Diagram

Description

Features

CLK

Crystal

Oscillator

VDD GND

PLL

Clock

Synthesis

and Control

Circuitry

Output

Buffer

Crystal

or clock

input

REF

X2

X1/ICLK

Divide

Logic and

Output

Buffer

PDTS (both outputs and PLL)

OTP

ROM

with PLL

Divider

Values