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CS5530 Geode™ Clock Source

The MK1491-06 is a low-cost, low-jitter, high-performance clock synthesizer for AMD's Geode-based computer and portable appliance applications. Using patented analog Phase-Locked Loop (PLL) techniques, the device accepts a 14.318 MHz crystal input to produce multiple output clocks. It provides selectable PCI local bus and AC97 clocks, 24 MHz and 48 MHz clocks for Super I/O and USB, as well as multiple Reference outputs. The device has a power down mode to reduce power consumption.


  • Packaged in 28-pin SOIC or in 28-pin SSOP
  • Provides all critical timing for the AMD Geode companion chip
  • Four PCI clocks
  • Selectable PCIF on up to 2 outputs
  • Early PCI clock selectability
  • Up to four reference clocks
  • 48 MHz USB and 24 MHz SIO support
  • AC97 audio clock
  • Multiple power-down modes
  • Low EMI Enable pin reduces EMI radiation on PCI clocks (patented)
  • Operating voltage of 3.3 V ±5%
  • Available in commercial (0 to +70°C) and industrial (-40 to +85°C) temperature ranges

Product Specification

Outputs (#)Output TypeOutput Freq Range (MHz)Inputs (#)Input TypeInput Freq (MHz)Output Voltage (V)Output Banks (#)Phase Jitter Typ RMS (ps)
1014.318000 - 49.152000Crystal14.3181803.3

Product Options

Orderable Part IDPart StatusPkg. CodePkg. TypeLead Count (#)Temp. GradePb (Lead) FreeCarrier TypeSample & Buy
MK1491-06RILFObsoletePCG28QSOP28IYesTubeCheck Availability
MK1491-06RILFTRObsoletePCG28QSOP28IYesReelCheck Availability
MK1491-06RLFObsoletePCG28QSOP28CYesTubeCheck Availability
MK1491-06RLFTRObsoletePCG28QSOP28CYesReelCheck Availability
MK1491-06SLFObsoletePSG28SOIC28CYesTubeCheck Availability
MK1491-06SLFTRObsoletePSG28SOIC28CYesReelCheck Availability


Technical Documentation

Title Type Format File Size Datesort icon
Datasheets & Errata
MK1491-06 Datasheet Datasheet PDF 126 KB Jun 9, 2014
PCN# : A1509-03 Gold to Copper wire Product Change Notice PDF 31 KB Oct 15, 2015
PDN# : U-14-02 PDN for MK1491 Product Discontinuation Notice PDF 232 KB Dec 2, 2014
PDN# : CQ-14-06R1 Revised Product Discontinuance Notice Product Discontinuation Notice PDF 407 KB Sep 8, 2014
show all (7)
PDN# : CQ-14-06 MANUFACTURING DISCONTINUANCE NOTICE Product Discontinuation Notice PDF 192 KB Sep 4, 2014
PCN# : A1305-01 Gold Wire to Copper Wire Product Change Notice PDF 148 KB Jul 29, 2013
PCN# : TB1303-02 Change of Tape & Reel Packing Method for Selective Products Product Change Notice PDF 361 KB Mar 24, 2013
PCN# : A1208-01R1 Gold to Copper Wire Product Change Notice PDF 254 KB Dec 21, 2012