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W48S111-14 - Spread Spectrum Desktop/Notebook System Frequency Generator

Key Features

  • Key Specifications.
  • Maximized EMI suppression using Cypress’s Spread Spectrum Technology.
  • Reduces measured EMI by as much as 10 dB.
  • I2C programmable to 133 MHz.
  • Two skew-controlled copies of CPU output.
  • SEL100/66# selects CPU frequency (100 or 66.8 MHz).
  • Seven copies of PCI output (synchronous w/CPU output).
  • One copy of 14.31818-MHz IOAPIC output.
  • One copy of 48-MHz USB output.
  • Selectable 24-/48-MHz clock is deter.

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Full PDF Text Transcription (Reference)

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PRELIMINARY W48S111-14 Spread Spectrum Desktop/Notebook System Frequency Generator Features Key Specifications • Maximized EMI suppression using Cypress’s Spread Spectrum Technology • Reduces measured EMI by as much as 10 dB • I2C programmable to 133 MHz • Two skew-controlled copies of CPU output • SEL100/66# selects CPU frequency (100 or 66.8 MHz) • Seven copies of PCI output (synchronous w/CPU output) • One copy of 14.31818-MHz IOAPIC output • One copy of 48-MHz USB output • Selectable 24-/48-MHz clock is determined by resistor straps on power-up • One high-drive output buffer that produces a copy of the 14.318-MHz reference • Isolated core VDD pin for noise reduction Supply Voltages:....................................... VDDQ3 = 3.3V±5% VDDQ2 = 2.