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MK1432 - Green PC and Local Bus Clock Source

General Description

The MK1432 and MK1434 are low cost, high performance triple clock synthesizers for green PC and local bus desktop and notebook applications.

Using analog Phase-Locked Loop (PLL) techniques, the devices accept a 14.318 MHz crystal input to produce multiple output clocks up to 100 MHz.

Key Features

  • Packaged in 16 pin narrow (150 mil) SOIC.
  • Supports all Pentium ™ Processor timing specs.
  • Supports synchronous and asynchronous local bus.
  • Selectable local bus frequencies of 25, 33, or 50MHz.
  • SCSI or VL bus 40MHz clock on MK1434.
  • Floppy or super I/O clock on MK1432.
  • Single Power Saving pin switches to low power mode (for 486 and Pentium).
  • 5V or 3.3V (up to 80MHz) operation.
  • Smooth transitions for Pentium and 486 ba.

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Datasheet Details

Part number MK1432
Manufacturer Integrated Circuit Systems
File Size 61.72 KB
Description Green PC and Local Bus Clock Source
Datasheet download datasheet MK1432 Datasheet

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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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MK1432/MK1434 Green PC and Local Bus Clock Source Description The MK1432 and MK1434 are low cost, high performance triple clock synthesizers for green PC and local bus desktop and notebook applications. Using analog Phase-Locked Loop (PLL) techniques, the devices accept a 14.318 MHz crystal input to produce multiple output clocks up to 100 MHz. They provide selectable 2XCPU and CPU, selectable local bus clock, ISA clock, and one fixed peripheral clock. The chips support PCI and VL buses. The fixed clock is either 24MHz or 40MHz. The devices can operate at 5V or 3.3V up to and including 80MHz on the 2XCPU clock. The Power Saving pin causes the CPU clocks to smoothly transition to 33.33 MHz for Pentiums, and 16.67 MHz for 486DX4. In addition, a single pin can be made to slow DX2s to 8 MHz.