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VCXO and Set-top Clock Source

The MK2771-16 is a low cost, low jitter, high-performance VCXO and clock synthesizer designed for set-top boxes. The on-chip Voltage Controlled Crystal Oscillator accepts a 0 to 3 V 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 13.5 MHz crystal input to produce multiple output clocks including a selectable processor clock, a selectable audio clock, two communications clocks, a 13.5 MHz clock, and three 27 MHz clocks. All clocks are frequency locked to the 27 MHz output (and to each other) with zero ppm error, so any output can be used as the VCXO output.


  • Packaged in 28-pin SSOP (QSOP)
  • Available in Pb (lead) free package
  • On-chip patented VCXO with pull range of 200 ppm
  • VCXO tuning voltage of 0 to 3 V
  • Processor frequencies include 16.66, 20, 25, 32, 40, and 50 MHz
  • Audio clocks support 32 kHz, 44.1 kHz, 48 kHz and 96 kHz sampling rates
  • Zero ppm synthesis error in all clocks (all exactly track 27 MHz VCXO)
  • Uses an inexpensive 13.5 MHz pullable crystal
  • Full CMOS output swings with 25 mA output drive capability at TTL levels
  • Advanced, low power, sub-micron CMOS process
  • 5 V operating voltage with 3.3 V capable I/O

Product Specification

Outputs (#)Output TypeOutput Freq Range (MHz)Inputs (#)Input TypeInput Freq (MHz)Output Voltage (V)Output Banks (#)Phase Jitter Typ RMS (ps)
8LVCMOS8.190000 - 50.00000013.5000003.3

Product Options

Orderable Part IDPart StatusPkg. CodePkg. TypeLead Count (#)Temp. GradePb (Lead) FreeCarrier TypeSample & Buy
MK2771-16RLFObsoletePCG28QSOP28CYesTubeCheck Availability
MK2771-16RLFTRObsoletePCG28QSOP28CYesReelCheck Availability


Technical Documentation

Title Type Format File Size Datesort icon
Datasheets & Errata
MK2771-16 Datasheet Datasheet PDF 187 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-849 Loop Filter Component Selection for VCXO Based PLLs Application Note PDF 132 KB May 14, 2014
AN-848 VCXO - Crystal Selection Application Note PDF 138 KB May 14, 2014
show all (6)
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
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