Integrated

Circuit

Systems, Inc.

General Description

Features

ICS9248-80

Block Diagram

Pentium II is a trademark of Intel Corporation

I

General Purpose 133MHz System Clock

9248-80 Rev A 3/21/00

Pin Configuration

•

Extended temperature range (-20°C to +70°C)

•

Output features:

- 8 CLK outputs @ 3.3V, up to 133.34MHz.

-1-REFoutput@3.3V,14.31818MHz.

•

Spread Spectrum for EMI control

•

Excellent power managment feature through CLK_STOP#

•

Input is from a 14.31818MHz crystal.

28-Pin 209 mil SSOP

The ICS9248-80 is a general purpose system clock. It

provides 8 output CLKs, 1 REF CLK and excellent power

management features through CLK_STOP#.

Spread spectrum typically reduces EMI by 8dB to 10 dB.

This simplifies EMI qualification without resorting to board

design iterations or costly shielding. The ICS9248-80

employs a proprietary closed loop design, which tightly

controls the percentage of spreading over process and

temperature variations.

* These inputs have a 120K internal pull-up to 3.3V.

** These inputs have a 120K internal pull-down to GND.

ICS reserves the right to make changes in the device data identified in

this publication without further notice. ICS advises its customers to

obtain the latest version of all device data to verify that any

information being relied upon by the customer is current and accurate.