ICS9169CF-41 ICST [Integrated Circuit Systems], ICS9169CF-41 Datasheet

ICS9169CF-41

Manufacturer Part Number

ICS9169CF-41

Description

Manufacturer

ICST [Integrated Circuit Systems]

Datasheet

1.ICS9169CF-41.pdf (7 pages)

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General Description

Frequency Generator for PentiumPro™ Based Systems

The ICS9169C-41 is a Clock Synthesize/Driver chip for

Pentium, PentiumPro or Cyrix 68x86 based motherboards

using SDRAM.

Features include four dual purpose I/O pins which provide

extra CPU clocks and enable the part to be packaged in a

low-cost 34-pin SSOP package. These four pins latch the

select inputs at the internal Power-On Reset. Additionally,

the device meets the Pentium and PentiumPro power-up

stabilization, which requires that CPU and PCI clocks be

stable within 2ms after power-up.

The ICS9169C-41 clock outputs are designed for low EMI

emissions. Controlled rise and fall times, unique output

driver circuits and innovative circuit layout techniques enable

the ICS9169C-41 to have lower EMI than other clock

devices.

The ICS9169C-41 accepts a 14.318MHz reference crystal or

clock as its input and runs from a 3.3V supply.

Block Diagram

9169-41Rev D 5/02/00

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.

Features

•

12 selectable CPU/SDRAM/AGP clocks up to 75 MHz

Six PCI clocks, synchronous or asynchronous mode, pin

selectable by Bus Select input (pin 19)

One USB clock at 48MHz, meets Intel jitter, accuracy, as

well as rise and fall time requirements

One I/O clock at 24MHz

Two Ref. Clocks at 14.318MHz

CPU clocks to PCI clock skew of 1-4ns (CPU early)

Low CPU and PCI clock jitter <200ps

Low skew outputs, skew window 250ps for CPU clocks

and for PCI clocks

Improved output drivers are designed for low EMI

Test Mode

3.3V ±10% operation

Space saving and low cost 34-pin SSOP package

Pin Configuration

34-Pin SSOP

Pentium is a trademark on Intel Corporation.

ICS9169C-41

Related parts for ICS9169CF-41

ICS9169CF-41 Summary of contents

Page 1

Frequency Generator for PentiumPro™ Based Systems General Description The ICS9169C- Clock Synthesize/Driver chip for Pentium, PentiumPro or Cyrix 68x86 based motherboards using SDRAM. Features include four dual purpose I/O pins which provide extra CPU clocks and enable the ...

Page 2

Pin Descriptions ...

Page 3

Functionality ° 3.3V±10%, 0-70 C Crystal (X1, X2) = 14.31818 MHz ...

Page 4

Absolute Maximum Ratings Supply Voltage . . . . . . . . . . . . . . . . . . . . . . . . . . 7.0 V Logic Inputs . . . . . ...

Page 5

Electrical Characteristics at 3.3V ° 3.0 – 3 – unless otherwise stated ...

Page 6

Technical Pin Function Descriptions VDD This is the power supply to the internal logic of the device as well as the following clock output buffers: This pin may be operated at any voltage between 3.0 and 3.7 volts. Clocks from ...

Page 7

... Ordering Information ICS9169CF-41 Example: ICS XXXX F - PPP Pattern Number ( digit number for parts with ROM code patterns) Package Type F=SSOP Device Type (consists digit numbers) Prefix ICS Standard Device ICS9169C-41 ICS reserves the right to make changes in the device data identified in this 7 publication without further notice ...

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