ics9169c-272 ETC-unknow, ics9169c-272 Datasheet

ics9169c-272

Manufacturer Part Number

ics9169c-272

Description

Frequency Generator Pentium Based Systems

Manufacturer

ETC-unknow

Datasheet

1.ICS9169C-272.pdf (8 pages)

Current page: 1 of 8
Download datasheet (369Kb)

General Description

The ICS9169C-272 is a low-cost frequency generator

designed specifically for Pentium based chip set systems.

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. A raised frequency setting of 68.5MHz is available

in the Turbo-mode of the 66.8MHz CPU. The ICS9169C-272

contains 12 CPU clocks, 4 PCI clocks, 1 REF at 48MHz and 1 at

24MHz.

The twelve CPU clock outputs provide sufficient clocks for

the CPU, chip set, memory and up to two DIMM connectors

(with four clocks to each DIMM). Either synchronous(CPU/

2) or asynchronous (32 MHz) PCI bus operation can be selected

by latching data on the BSEL input

Block Diagram

VDD Groups:

VDD1 = X1, X2, REF/BSEL

VDDC1 = CPU1-6

VDDC2 = CPU7-12 & PLL Core

VDDB = BUS1-6

VDDF = 48/24 MHz

Frequency Generator for Pentium™ Based Systems

Latched Inputs:

L1 = BSEL

L2 = FS0

L3 = FS1

L4 = FS2

9169C-272RevC060297P

Integrated

Circuit

Systems, Inc.

FS2 FS1

A D D R E SS

SELECT

FS0

3.3V±10%, 0-70

Crystal (X1, X2) = 14.31818 MHz

Functionality

C PU (1:12)

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.

(M H z)

Features

•

66.8

75.9

83.3

68.5

Twelve selectable CPU clocks operate up to 83.3MHz

Maximum CPU jitter of ± 200ps

Six BUS clocks support sync or async bus operation

250ps skew window for CPU outputs, 500ps skew

window for BUS outputs

CPU clocks BUS clocks skew 1-4ns (CPU early)

Integrated buffer outputs drive up to 30pF loads

3.0V - 3.7V supply range, CPU(1:6) outputs 2.5V(2.375-

2.62V) VDD option

32-pin SOIC/SOJ package

Logic inputs latched at Power-On for frequency selection

saving pins as Input/Output

48 MHz clock for USB support and 24 MHz clock

for FD.

BSEL=1 BSEL=0

BU S (1:6)M H z

34.25

33.4

27.5

37.5

41.7

Pin Configuration

32-Pin SOIC/SOJ

Pentium is a trademark of Intel Corporation.

ICS9169C-272

48M H z

24M H z

R EF

REF

Related parts for ics9169c-272

Related keywords

ics9169c-272 datasheet
ics9169c-272 data sheet
ics9169c-272 pdf datasheet
ics9169c-272 component
ics9169c-272 part
ics9169c-272 distributor
ics9169c-272 RoHS
ics9169c-272 datasheet download