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ICS9248-98

Frequency Generator & Integrated Buffers for Celeron & PII/III™

Integrated Circuit Systems 

ICS9248-98

General Description

The ICS9248-98 is a single chip clock solution for Desktop

designs. It provides all necessary clock signals for such a

system.

Spread spectrum may be enabled through I2C programming.

Spread spectrum typically reduces system EMI by 8dB to

10dB. This simplifies EMI qualification without resorting to

board design iterations or costly shielding. The ICS9248-98

employs a proprietary closed loop design, which tightly

controls the percentage of spreading over process and

temperature variations.

Serial programming I2C interface allows changing functions,

stop clock programming and frequency selection.

Power Groups

VDD1 = REF, X1, X2

VDD2 = PCICLK_F, PCICLK

VDD3 = SDRAM, supply for PLL core

VDD4 = 24MHz, 48MHz

VDDL1 = IOAPIC

VDDL2 = CPUCLK 1, CPUCLK_F

Mode Pin - Power Management Input Control

MODE, Pin 7

(Latched Input)

0

1

Pin 2

PCI_STOP#

(Input)

REF0

(Output)

Third party brands and names are the property of their respective owners.

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