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ICS9248-64 - Frequency Generator & Integrated Buffers

General Description

The ICS9248-64 is a main clock synthesizer chip for AMDK7 based systems.

This provides all clocks required for such a system when used with a Zero Delay Buffer Chip such as the ICS9179-06.

Spread Spectrum may be enabled by driving the SPREAD# pin active.

Key Features

  • Generates the following system clocks: - 3 differential pair open drain CPU clocks (1.5V external pull-up; up to 133MHz). - 8 PCI including 1 free running (3.3V) @33.3MHz. - 2 AGP(3.3V) up to 66.6MHz. - 2 REF(3.3V)@14.318MHz - 1 48MHz(3.3V) - 24 / 48MHz(3.3V) Skew characteristics: - CPU -CPU.

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Datasheet Details

Part number ICS9248-64
Manufacturer Integrated Circuit Systems
File Size 142.03 KB
Description Frequency Generator & Integrated Buffers
Datasheet download datasheet ICS9248-64 Datasheet

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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Integrated Circuit Systems, Inc. ICS9248-64 AMD-K7TM System Clock Chip General Description The ICS9248-64 is a main clock synthesizer chip for AMDK7 based systems. This provides all clocks required for such a system when used with a Zero Delay Buffer Chip such as the ICS9179-06. Spread Spectrum may be enabled by driving the SPREAD# pin active. Spread spectrum typically reduces system EMI by 8dB to 10dB. This simplifies EMI qualification without resorting to board design iterations or costly shielding. The ICS9248-64 employs a proprietary closed loop design, which tightly controls the percentage of spreading over process and temperature variations. Features • Generates the following system clocks: - 3 differential pair open drain CPU clocks (1.5V external pull-up; up to 133MHz).