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W137 - Bx Notebook System Frequency Synthesizer

General Description

CPU Clock Outputs 0 and 1: These two CPU clock outputs are controlled by the CPU_STOP# control pin.

Output voltage swing is controlled by voltage applied to VDDQ2.

Frequency is selected per Table 1.

Key Features

  • Maximized EMI suppression using Cypress’s Spread Spectrum Technology.
  • Two copies of CPU output.
  • Six copies of PCI output (Synchronous w/CPU output).
  • One 48-MHz output for USB support.
  • One selectable 24-/48-MHz output.
  • Two Buffered copies of 14.318-MHz input reference signal.
  • Supports 100-MHz or 66-MHz CPU operation.
  • Power management control input pins.
  • Available in 28-pin SSOP (209 mils).
  • SS function can b.

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Part Number Description
W130 Spread Spectrum Desktop/Notebook System Clock
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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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W137 Bx Notebook System Frequency Synthesizer Features • Maximized EMI suppression using Cypress’s Spread Spectrum Technology • Two copies of CPU output • Six copies of PCI output (Synchronous w/CPU output) • One 48-MHz output for USB support • One selectable 24-/48-MHz output • Two Buffered copies of 14.318-MHz input reference signal • Supports 100-MHz or 66-MHz CPU operation • Power management control input pins • Available in 28-pin SSOP (209 mils) • SS function can be disabled • See W40S11-02 for 2 SDRAM DIMM support PCI_F, PCI1:5 Output to Output Skew:........................ 500 ps PCI_F, PCI1:5 Cycle to Cycle Jitter: ............................ 250 ps CPU to PCI Output Skew: ............... 1.5–4.0 ns (CPU Leads) Output Duty Cycle: .................................................