Datasheet4U Logo Datasheet4U.com

W164 - Spread Spectrum Desktop/Notebook System Frequency Generator

Description

CPU Clock Outputs 0 through 1: These two CPU clocks run at a frequency set by SEL100/66#.

Output voltage swing is set by the voltage applied to VDDQ2.

PCI Clock Outputs 1 through 6 and PCI_F: These seven PCI clock outputs run synchronously to the CPU clock.

Features

  • Maximized EMI suppression using Cypress’s Spread Spectrum technology.
  • Reduces measured EMI by as much as 10 dB.
  • I2C programmable to 153 MHz (16 selectable frequencies).
  • 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 output.

📥 Download Datasheet

Datasheet preview – W164

Datasheet Details

Part number W164
Manufacturer Cypress
File Size 137.15 KB
Description Spread Spectrum Desktop/Notebook System Frequency Generator
Datasheet download datasheet W164 Datasheet
Additional preview pages of the W164 datasheet.

📁 Similar Datasheet

  • W160A - 160 Lead Cerquad (National Semiconductor)
  • W168 - Dual P-Channel 30V MOSFET (VBsemi)
  • W16NA40 - STW16NA40 (ST Microelectronics)
  • W16NB60 - STW16NB60 (STMicroelectronics)
Other Datasheets by Cypress Semiconductor
  • W161 - 133-MHz Spread Spectrum FTG
  • W162 - Spread Aware/ Zero Delay Buffer
  • W163 - Spread Aware/ Zero Delay Buffer
  • W166 - Spread Spectrum Frequency Timing Generator
  • W167B - 133-MHz Spread Spectrum FTG

Full PDF Text Transcription

Click to expand full text
W164 Spread Spectrum Desktop/Notebook System Frequency Generator Features • Maximized EMI suppression using Cypress’s Spread Spectrum technology • Reduces measured EMI by as much as 10 dB • I2C programmable to 153 MHz (16 selectable frequencies) • 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 output 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 Key Specifications Supply Voltages:....................................... VDDQ3 = 3.3V±5% VDDQ2 = 2.
Published: |