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W195B - Frequency Generator for Integrated Core Logic

Datasheet Summary

Description

Reference Clock with 2x Drive/Frequency Select 3: 3.3V 14.318-MHz clock output.

This pin also serves as the select strap to determine device operating frequency as described in Table 1.

Crystal Input: This pin has dual functions.

Features

  • Maximized EMI suppression using Cypress’s Spread Spectrum Technology.
  • Low jitter and tightly controlled clock skew.
  • Highly integrated device providing clocks required for CPU, core logic, and SDRAM.
  • Two copies of CPU clocks.
  • Nine copies of SDRAM clocks.
  • Eight copies of PCI clock.
  • One copy of synchronous APIC clock.
  • Two copies of 66-MHz outputs.
  • Two copies of 48-MHz outputs.
  • One copy of selectable 24- or 48.

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Datasheet preview – W195B

Datasheet Details

Part number W195B
Manufacturer Cypress Semiconductor
File Size 141.30 KB
Description Frequency Generator for Integrated Core Logic
Datasheet download datasheet W195B Datasheet
Additional preview pages of the W195B datasheet.

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Full PDF Text Transcription

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PRELIMINARY W195B Frequency Generator for Integrated Core Logic Features • Maximized EMI suppression using Cypress’s Spread Spectrum Technology • Low jitter and tightly controlled clock skew • Highly integrated device providing clocks required for CPU, core logic, and SDRAM • Two copies of CPU clocks • Nine copies of SDRAM clocks • Eight copies of PCI clock • One copy of synchronous APIC clock • Two copies of 66-MHz outputs • Two copies of 48-MHz outputs • One copy of selectable 24- or 48-MHz clock • One copy of double strength 14.31818-MHz reference clock • Power-down control • I2C interface for turning off unused clocks SDRAM, APIC, 48MHz Output Skew: ........................ 250 ps PCI Output Skew: ........................................................
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