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MK2727 - Block Diagram
MK2727 - Pinout


Low Cost 27MHz VCXO

The MK2727 is IDT’s lowest cost, low-jitter, high-performance VCXO and PLL clock synthesizer designed to replace expensive 27MHz VCXOs. The on-chip Voltage Controlled Crystal Oscillator accepts a 0 to 3V input voltage to cause the output clocks to vary by ±100 ppm. Using IDT’s patented VCXO and analog Phase-Locked Loop (PLL) techniques, the device uses an inexpensive external 13.5 MHz pullable crystal input to produce a 27 MHz output clock. IDT manufactures the largest variety of Set-Top Box and multimedia clock synthesizers for all applications. If more clock outputs are needed, see the MK2731 or MK277x family of parts. Consult IDT to eliminate VCXOs, crystals and oscillators from your board.


  • Packaged in 8-pin narrow SOIC
  • Uses an inexpensive 13.500 MHz external crystal
  • On-chip VCXO with pull range of 200 ppm (minimum)
  • VCXO input tuning voltage 0 to 3.3 V
  • 25 mA output drive capability at TTL levels
  • Advanced, low-power, sub-micron CMOS process
  • 5 V operating voltage

Product Specification

Outputs (#)Output TypeOutput Freq Range (MHz)Input Freq (MHz)Inputs (#)Input TypeOutput Banks (#)Core Voltage (V)Output Voltage (V)

Product Options

Orderable Part IDPart StatusPkg. CodePkg. TypeLead Count (#)Temp. GradePb (Lead) FreeCarrier TypeSample & Buy
MK2727SLFObsoleteDCG8SOIC8CYesTubeCheck Availability
MK2727SLFTRObsoleteDCG8SOIC8CYesReelCheck Availability


Technical Documentation

Title Type Format File Size Datesort icon
Datasheets & Errata
MK2727 Datasheet Datasheet PDF 172 KB May 17, 2010
Apps Notes & White Papers
AN-841 Pullable Crystal Selection and VCXO Tuning Application Note PDF 248 KB Sep 23, 2014
AN-848 VCXO - Crystal Selection Application Note PDF 138 KB May 14, 2014
AN-849 Loop Filter Component Selection for VCXO Based PLLs Application Note PDF 132 KB May 14, 2014
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AN-847 VCXO - Absolute Pull Range Application Note PDF 70 KB May 13, 2014
AN-800 Approved VCXO Crystals Application Note PDF 63 KB Jan 28, 2014
Using IDT's Integrated VCXO Products MAN05 Application Note PDF 69 KB Jun 6, 2012
Ferrite Bead Recommendations Application Note PDF 25 KB Mar 9, 2006
PDN# : U-13-05R2 PRODUCT DISCONTINUANCE NOTICE (REVISED) Product Discontinuation Notice PDF 161 KB Oct 29, 2013
PDN# : U-13-05R1 PRODUCT DISCONTINUANCE NOTICE Product Discontinuation Notice PDF 161 KB Jul 25, 2013
PDN# : U-13-05 PRODUCT DISCONTINUANCE NOTICE Product Discontinuation Notice PDF 159 KB Apr 10, 2013
show all (4)
PCN# : TB1303-02 Change of Tape & Reel Packing Method for Selective Products Product Change Notice PDF 361 KB Mar 24, 2013