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ICS9248-95 - Frequency Generator & Integrated Buffer

Description

The ICS9248-95 is the single chip clock solution for Desktop designs using the VIA MVP4 style chipset.

It provides all necessary clock signals for such a system.

Spread spectrum may be enabled through I2C programming.

Features

  • Up to 124MHz frequency support.
  • Spread Spectrum for EMI control ±0.5% center spread and ±0.25% center spread.
  • Serial I2C interface for Power Management, Frequency Select, Spread Spectrum.
  • Provides the following system clocks - 4-CPUs @ 3.3V, up to 124MHz. - 13-SDRAMs @3.3V, up to 124MHz (including SDRAM_F) - 6-PCI @3.3V, CPU/2 or CPU/3 (including PCICLK_F) (including 1 free running). - 1-24MHz @3.3V fixed. - 1-48MHz @3.3V fixed. - 2-REF @3.3V, 14.318MHz.

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Datasheet Details

Part number ICS9248-95
Manufacturer Renesas
File Size 661.45 KB
Description Frequency Generator & Integrated Buffer
Datasheet download datasheet ICS9248-95 Datasheet

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Full PDF Text Transcription

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ICS9248 - 95 Frequency Generator & Integrated Buffers for PENTIUM/ProTM General Description The ICS9248-95 is the single chip clock solution for Desktop designs using the VIA MVP4 style chipset. 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 ICS9248-95 employs a proprietary closed loop design, which tightly controls the percentage of spreading over process and temperature variations. Block Diagram Features • Up to 124MHz frequency support. • Spread Spectrum for EMI control ±0.5% center spread and ±0.
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