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W137 - Bx Notebook System Frequency Synthesizer

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.

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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Datasheet preview – W137

Datasheet Details

Part number W137
Manufacturer Cypress Semiconductor
File Size 174.77 KB
Description Bx Notebook System Frequency Synthesizer
Datasheet download datasheet W137 Datasheet
Additional preview pages of the W137 datasheet.

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Full PDF Text Transcription

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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: .................................................
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