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MK5811 - Block Diagram
MK5811 - Pinout


Low EMI Clock Generator

The MK5811 device generates a low EMI output clock from a clock or crystal input. The device is designed to dither a high emissions clock to lower EMI in consumer applications. Using IDT’s proprietary mix of analog and digital Phase Locked Loop (PLL) technology, the device spreads the frequency spectrum of the output and reduces the frequency amplitude peaks by several dB. The MK5811 offers both centered and down spread from a high-speed clock input. For different multiplier configurations, use the MK5812 (2x) or MK5814 (4x). IDT offers many other clocks for computers and computer peripherals. Consult IDT when you need to remove crystals and oscillators from your board.


  • Packaged in 8-pin SOIC
  • Pb (lead) free package
  • Provides a spread spectrum output clock
  • Supports flat panel controllers
  • Accepts a clock or crystal input (provides same frequency dithered output)
  • Input frequency range of 4 to 32 MHz
  • Output frequency range of 4 to 32 MHz
  • 1X frequency multiplication
  • Center and down spread
  • Peak reduction by 8 dB to 16 dB typical on 3rd through 19th odd harmonics
  • Low EMI feature can be disabled
  • Operating voltage of 3.3 V
  • Advanced, low-power CMOS process
  • The MK5811A is recommended for new designs.

Product Specification

Output TypeOutput Freq Range (MHz)Input Freq (MHz)Inputs (#)Input TypeOutput Banks (#)Core Voltage (V)Output Voltage (V)
LVCMOS0.000000 - 32.0000000.000000 - 32.0000001LVCMOS, Crystal13.33.3

Product Options

Orderable Part IDPart StatusPkg. CodePkg. TypeLead Count (#)Temp. GradePb (Lead) FreeCarrier TypeSample & Buy
MK5811SLFObsoleteDCG8SOIC8CYesTubeCheck Availability
MK5811SLFTRObsoleteDCG8SOIC8CYesReelCheck Availability


Technical Documentation

Title Type Format File Size Datesort icon
Datasheets & Errata
MK5811 Datasheet Datasheet PDF 82 KB Apr 11, 2011
Apps Notes & White Papers
AN-828 Termination - LVPECL Application Note PDF 229 KB Jul 5, 2016
AN-844 Termination - AC Coupling Clock Receivers Application Note PDF 82 KB May 13, 2014
AN-845 Termination - LVCMOS Application Note PDF 62 KB May 13, 2014
show all (12)
AN-842 Thermal Considerations in Package Design and Selection Application Note PDF 403 KB May 12, 2014
AN-840 Jitter Specifications for Timing Signals Application Note PDF 349 KB May 8, 2014
AN-839 RMS Phase Jitter Application Note PDF 149 KB May 7, 2014
AN-838 Peak-to-Peak Jitter Calculations Application Note PDF 32 KB May 7, 2014
AN-836 Differential Input to Accept Single-ended Levels Application Note PDF 37 KB May 6, 2014
AN-835 Differential Input with VCMR being VIH Referenced Application Note PDF 77 KB May 6, 2014
AN-827 Application Relevance of Clock Jitter Application Note PDF 1.06 MB Apr 24, 2014
AN-815 Understanding Jitter Units Application Note PDF 476 KB Apr 24, 2014
AN-805 Recommended Ferrite Beads Application Note PDF 38 KB Jan 15, 2014
PDN# : U-13-04R1 PRODUCT DISCONTINUANCE NOTICE Product Discontinuation Notice PDF 70 KB May 28, 2013
PCN# : TB1303-02 Change of Tape & Reel Packing Method for Selective Products Product Change Notice PDF 361 KB Mar 24, 2013
PDN# : U-13-04 PRODUCT DISCONTINUANCE NOTICE Product Discontinuation Notice PDF 69 KB Mar 21, 2013

Software & Tools

Title Type Format File Size Datesort icon
MK5811 3.3V IBIS Model Model - IBIS ZIP 3 KB Mar 13, 2006