ICS9248-61 Datasheet PDF - Renesas Frequency Timing Generator Specs

ICS9248-61 - Frequency Timing Generator

Datasheet Summary

Description

The ICS9248-61 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. - 7 PCI(3.3V) @ 33.3MHz (Includes one free running). - 2 REF clks Fixed (3.3V) 48MHz at 14.318MHz. Skew characteristics: - CPU CPU.

Datasheet Details

Part number	ICS9248-61
Manufacturer	Renesas
File Size	386.43 KB
Description	Frequency Timing Generator
Datasheet	ICS9248-61 Datasheet
Additional preview pages of the ICS9248-61 datasheet.

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Full PDF Text Transcription

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ICS9248-61 Frequency Timing Generator for Pentium II Systems General Description The ICS9248-61 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 ICS9248-61 employs a proprietary closed loop design, which tightly controls the percentage of spreading over process and temperature variations. Block Diagram Features Generates the following system clocks: - 2CPU(2.5V) up to 100MHz. - 7 PCI(3.3V) @ 33.

Published: Feb 28, 2021 |