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ICS950104 - Programmable System Clock Chip for PIII Processor

Description

PIN NUMBER 1 PIN NAME CPUCLKC0 TYPE OUT DESCRIPTION "Complementary" clocks of differential pair CPU outputs.

These clocks are 180° out of phase with SDRAM clocks.

These open drain outputs need an external 1.5V pull-up.

Features

  • 1 - CPU clocks @ 2.5V.
  • 1 - Pair of differential CPU clocks @ 3.3V.
  • 9 - SDRAM @ 3.3V.
  • 7 - PCI @3.3V.
  • 1 - 48MHz, @3.3V.
  • 1 - 24/48MHz @ 3.3V.
  • 3 - REF @3.3V, (selectable strength) through I2C Features:.
  • Programmable ouput frequency.
  • Programmable ouput rise/fall time.
  • Programmable CPU, SDRAM, and PCI skew.
  • Real time system reset output.
  • Spread spectrum for EMI control typically by 7dB to 8dB,.

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Datasheet Details

Part number ICS950104
Manufacturer Integrated Circuit Systems
File Size 222.98 KB
Description Programmable System Clock Chip for PIII Processor
Datasheet download datasheet ICS950104 Datasheet
Additional preview pages of the ICS950104 datasheet.

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Full PDF Text Transcription

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Integrated Circuit Systems, Inc. ICS950104 Advance Information Programmable System Clock Chip for PIII™ Processor Recommended Application: SIS630ST style chipset Output Features: • 1 - CPU clocks @ 2.5V • 1 - Pair of differential CPU clocks @ 3.3V • 9 - SDRAM @ 3.3V • 7 - PCI @3.3V • 1 - 48MHz, @3.3V • 1 - 24/48MHz @ 3.3V • 3 - REF @3.3V, (selectable strength) through I2C Features: • Programmable ouput frequency • Programmable ouput rise/fall time • Programmable CPU, SDRAM, and PCI skew • Real time system reset output • Spread spectrum for EMI control typically by 7dB to 8dB, with programmable spread percentage • Watchdog timer technology to reset system if over-clocking causes malfunction • Uses external 14.
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