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ICS9169C-36

Low Cost 20-Pin Frequency Generator

Integrated Circuit Systems 

Integrated

Circuit

Systems, Inc.

ICS9169C-36

Low Cost 20-Pin Frequency Generator

Description

TheICS9169C-36generates the I/O clocks needed as a satellite

clock generator to a CPU and PCI clock source (such as the

ICS9148-01 or ICS9150-01). This device can generate the

audio Codec or DSP clocks if required (or Stop those outputs

Low).

The device is nominally driven at the X1 pin by a 14.31818

MHz clock source. The device can also be driven by a crystal

using external load capacitors as a stand-alone generator.

The SREF0 output is a reference clock output which is stronger

to allow multiple ISA slots.

Features

• Generator for periphary clock chips as companion

device to CPU/SDRAM/PCI generator.

• Accepts clock input at X1 pin or crystal across X1,

X2 pins as 14.31818 MHz nominal inputs.

• Three REF clock buffer outputs (SREF is Strong)

• Two 48MHz and one 24 MHz outputs

• Selectable audio clock generator with audio (Audio)

and half speed (Audio/2) outputs

• 20 pin (209 mil) SSOP package

Block Diagram

Pin Configuration

20-Pin SSOP

Functionality

3.3V±10%, 0-70°C

Clock source driving X1 pin or crystal (X1, X2) = 14.31818 MHz

(all frequencies in MHz)

FS1

FS0

AUDIO AUDIO/2 SREF, REF 48 MHz

0

0

XTAL/2

XTAL/4

14.318

XTAL/2

0

1

24.5795

12.2898

14.318

48.008

1

0

33.8680

16.9340

14.318

48.008

1

1

LOW

LOW

14.318

48.008

24 MHz

XTAL/4

24.004

24.004

24.004

OE

All Outputs

0

Tristate

1

Active

ICS9169C-36RevD060197P

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.

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