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MK1491-14 - OPTi ACPI Firestar Clock Source

Download the MK1491-14 datasheet PDF (MK1491E-14 included). The manufacturer datasheet provides complete specifications, pinout details, electrical characteristics, and typical applications for opti acpi firestar clock source.

Description

The MK1491-14 is a low cost, low jitter, high performance clock synthesizer for OPTi’s Firestar and Firestar+ chipsets for Pentium™ Processor-based mobile computer applications.

Features

  • Packaged in 28 pin, 150 mil wide SSOP.
  • Provides all critical timing for OPTi ACPI Firestar and Firestar+.
  • Early Host clock of 3.5ns.
  • Separate VDD and skew adjust for Host 5,6, and 7 supports field upgrade to Firestar+ and new 2.5V processors.
  • 48MHz USB, 24MHz SIO, and Audio clock support.
  • Single pin CPU(Host) slowdown to 33.3MHz.
  • Multiple power down modes.
  • Low EMI Enable pin reduces EMI radiation (patent pending) Block Dia.

📥 Download Datasheet

Note: The manufacturer provides a single datasheet file (MK1491E-14_IntegratedCircuitSystems.pdf) that lists specifications for multiple related part numbers.

Datasheet Details

Part number MK1491-14
Manufacturer Integrated Circuit Systems
File Size 91.01 KB
Description OPTi ACPI Firestar Clock Source
Datasheet download datasheet MK1491-14 Datasheet

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Full PDF Text Transcription

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www.DataSheet4U.com MK1491-14 OPTi ACPI Firestar Clock Source Description The MK1491-14 is a low cost, low jitter, high performance clock synthesizer for OPTi’s Firestar and Firestar+ chipsets for Pentium™ Processor-based mobile computer applications. Using analog Phase-Locked Loop (PLL) techniques, the device uses a 14.318 MHz crystal input to produce multiple output clocks up to 75 MHz. It provides selectable Host and PCI local bus clocks as well as selectable clocks for Super I/O or Universal Serial Bus (USB). The device has up to seven Host output clocks. The chip has three different power down modes that reduce power on various clocks. Features • Packaged in 28 pin, 150 mil wide SSOP • Provides all critical timing for OPTi ACPI Firestar and Firestar+ • Early Host clock of 3.
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