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CY2254A - Pentium Processor Compatible Clock Synthesizer/Driver

General Description

The CY2254A is a Clock Synthesizer/Driver that provides the multiple clocks required for a Pentium-based PC.

The CY2254A has low-skew outputs (< 250 ps between the CPU Clocks, < 250 ps between the PCI Clocks).

In addition, the CY2254A CPU clock outputs have less than 200 ps cycle-to-cycle jitter.

Key Features

  • Multiple clock outputs to meet requirements of most Pentium® motherboards.
  • Four pin-selectable CPU clocks @ 66.66 MHz, 60.0 MHz, and 50.0 MHz for support of Intel Triton™ PCIset based PC.
  • 55.0 MHz pin-selectable CPU clock also available (.
  • 2 option only).
  • Six PCI clocks at 1/2 CPU Clock frequency.
  • One I/O clock @ 24 MHz.
  • One Keyboard Controller clock @ 12 MHz (.
  • 1 option) or one Universal Serial Bus clock @ 48 MHz (.
  • 2 o.

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Other Datasheets by Cypress (now Infineon)

Part Number Description
CY22050 One-PLL General Purpose Flash Programmable Clock Generator
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CY2213 High Frequency Programmable PECL Clock Generator
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CY22381 Three-PLL General Purpose Flash Programmable Clock Generator

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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4A www.DataSheet4U.com CY2254A Pentium® Processor Compatible Clock Synthesizer/Driver Features • Multiple clock outputs to meet requirements of most Pentium® motherboards — Four pin-selectable CPU clocks @ 66.66 MHz, 60.0 MHz, and 50.0 MHz for support of Intel Triton™ PCIset based PC — 55.0 MHz pin-selectable CPU clock also available (−2 option only) — Six PCI clocks at 1/2 CPU Clock frequency — One I/O clock @ 24 MHz — One Keyboard Controller clock @ 12 MHz (−1 option) or one Universal Serial Bus clock @ 48 MHz (−2 option) — Two Ref. clocks @ 14.318 MHz — Ref. 14.