Integrated

Circuit

Systems, Inc.

General Description

Features

ICS9169A-70

Block Diagram

Frequency Generator for Workstation Systems

9169A-70 Rev B 2/14/01

Pin Configuration

32-Pin SOIC

•

9 PCI outputs selectable from 30 to 66.6MHz

•

3 SCSI outputs, selectable from 10 to 80MHz

•

500ps skew window for all synchronous clock edges

•

Integrated buffer outputs drive up to 30pF loads

•

500ps output to output skew window

•

Buffers drive 30pF loads nominally 0.8V/ns skew rate

•

3.0V - 3.7Vsupply range

•

32-pin SOIC package

•

48 MHz clock for USB support and 24 MHz clock

for FD

The ICS9169A-70 is a low-cost frequency generator designed

specifically for workstation or PC system clocks. The

integrated buffer minimizes skew and provides all the clocks

required. A 14.318 MHz XTAL oscillator provides the

reference clock to generate standard Pentium frequencies.

The CPU clock makes gradual frequency transitions without

violating the PLL timing of internal microprocessor clock

multipliers.

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.