ICS9248F-169-T データシートの表示（PDF） - Integrated Circuit Systems

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ICS9248F-169-T

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

Integrated Circuit Systems 

General Description

The ICS9248-169 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 ICS9248-169

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.

Mode Pin - Power Management Input Control

MODE, Pin 7

(Latched Input)

0

1

Pin 2

PCI_STOP#

(Input)

REF0

(Output)

ICS9248-169

Power Groups

VDDREF = REF (1:0), X1, X2

VDDPCI = PCICLK_F, PCICLK(4:0)

VDDA = Supply for PLL core

VDD48 = 24MHz, 48MHz

VDDL = CPUCLK, CPUCLK_F, IOAPIC

VDDSDR = SDRAM

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

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