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ICS9248-157 - Frequency Generator & Integrated Buffers

Description

The ICS9248-157 is the Main clock solution for Notebook designs using the Intel ALI1621/1632M style chipset.

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

Features

  • 2 - CPUs @2.5V, up to 140MHz.
  • 7 - PCI @3.3V, (including one free running).
  • 1 - 48MHz, @3.3V fixed.
  • 2 - REF @3.3V, 14.318MHz. Features:.
  • Up to 140 MHz frequency support.
  • Support power management: CPU, PCI stop and Power down.
  • Spread spectrum for EMI control (0.5% down spread).
  • Uses external 14.318MHz crystal.
  • FS pins for frequency select Key Specifications:.
  • CPU.
  • CPU:.

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Datasheet Details

Part number ICS9248-157
Manufacturer Integrated Circuit Systems
File Size 151.43 KB
Description Frequency Generator & Integrated Buffers
Datasheet download datasheet ICS9248-157 Datasheet

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Full PDF Text Transcription

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Integrated Circuit Systems, Inc. ICS9248-157 Frequency Timing Generator for Pentium II Systems Recommended Application: ALI1621/1632M style chipsets Output Features: • 2 - CPUs @2.5V, up to 140MHz. • 7 - PCI @3.3V, (including one free running) • 1 - 48MHz, @3.3V fixed. • 2 - REF @3.3V, 14.318MHz. Features: • Up to 140 MHz frequency support • Support power management: CPU, PCI stop and Power down. • Spread spectrum for EMI control (0.5% down spread). • Uses external 14.318MHz crystal • FS pins for frequency select Key Specifications: • CPU – CPU: <175ps • PCI – PCI: <250ps • CPU(early)-PCI: 1.5ns - 4ns • PCI_E (early) - PCI: 2.
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