ICS9250-08 datasheet(3/17 Pages) RENESAS

Part #	ICS9250-08

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

PDF	17 Pages

Scroll/Zoom	100%

Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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3 / 17 page

ICS9250-08

0378J—05/17/05

General Description

The ICS9250-08 is the single chip clock solution for

Desktop/designs using BX, Appollo Pro 133 type of chip

sets. It provides all necessary clock signals for such a

system.

Spread spectrum may be enabled through I

programming.

Spread spectrum typically reduces system EMI by 8dB to

10dB. This simplifies EMI qualification without resorting

board design iterations or costly shielding. The ICS9250-

employs a proprietary closed loop design, which tightly

controls the percentage of spreading over process and

temperature variations.

Serial programming I

2C interface allows changing functions,

stop clock programming and frequency selection.

Power Groups

VDDREF = REF [1:0], X1, X2

VDDPCI = PCICLK_F, PCICLK [5:0]

VDDSDR = SDRAM [15:0], supply for PLL core,

VDD48 = 48MHz, 24MHz

VDDLIOAPIC = IOAPIC_F

VDDLCPU = CPUCLK_F [2:1]

Mode Pin - Power Management Input Control

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ICS9250-08 Datasheet(PDF) 3 Page - Renesas Technology Corp