ICS9248-56 Datasheet PDF - Integrated Circuit Systems Frequency Generator & Integrated Buffers Specs

ICS9248-56 - Frequency Generator & Integrated Buffers

Datasheet Summary

Description

The ICS9248-56 is the Main clock solution for Notebook designs using the Intel 440BX style chipset.

Along with an SDRAM buffer such as the ICS9179-03, it provides all necessary clock signals for such a system.

Spread spectrum may be enabled by driving pin 26, SPREAD# active (Low) at power-on.

Features

Generates the following system clocks: - 2CPU(2.5V) up to 100MHz. - 6 PCI(3.3V) @ 33.3MHz (Includes one free running). - 1 REF clks (3.3V) at 14.318MHz. - 1 Fixed clock at 48MHz - 1 Fixed clock at 48 or 24MHz Skew characteristics: - CPU.
CPU.

Datasheet Details

Part number	ICS9248-56
Manufacturer	Integrated Circuit Systems
File Size	263.63 KB
Description	Frequency Generator & Integrated Buffers
Datasheet	ICS9248-56 Datasheet
Additional preview pages of the ICS9248-56 datasheet.

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Full PDF Text Transcription

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Integrated Circuit Systems, Inc. ICS9248-56 Frequency Timing Generator for Pentium II Systems General Description The ICS9248-56 is the Main clock solution for Notebook designs using the Intel 440BX style chipset. Along with an SDRAM buffer such as the ICS9179-03, it provides all necessary clock signals for such a system. Spread spectrum may be enabled by driving pin 26, SPREAD# active (Low) at power-on. Spread spectrum typically reduces system EMI by 8dB to 10dB. This simplifies EMI qualification without resorting to board design iterations or costly shielding. The ICS9248-56 employs a proprietary closed loop design, which tightly controls the percentage of spreading over process and temperature variations. Features • Generates the following system clocks: - 2CPU(2.5V) up to 100MHz.

Published: Oct 7, 2005 |