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MK3724 - Block Diagram
MK3724 - Pinout


VCXO Plus Audio Clock For STB

The MK3724 is a low cost, low jitter, high performance VCXO and PLL clock synthesizer designed to replace expensive discrete VCXOs and multipliers. The patented on-chip Voltage Controlled Crystal Oscillator accepts a 0 to 3.3 V input voltage to cause the output clocks to vary by ±115 ppm. Using IDT's analog/digital Phase-Locked Loop (PLL) techniques, the device uses an inexpensive 27 MHz pullable crystal input to produce a reference output and a selectable audio clock. IDT manufactures the largest variety of VCXO based timing devices for all applications. Consult IDT to eliminate VCXOs, crystals, and oscillators from your board. The frequency of the on-chip VCXO is adjusted by an external control voltage connected to VIN. Because VIN is a high impedance input, it can be driven directly from an PWM RC integrator circuit.


  • Packaged in 16-pin TSSOP
  • Pb free packaging
  • Replaces a VCXO and oscillator
  • Operating voltage of 3.3 V
  • Provides output of 27 MHz plus audio clock
  • Uses an inexpensive 27 MHz pullable crystal
  • On-chip patented VCXO with pull range of 230 ppm (minimum)
  • VCXO tuning voltage of 0 to 3.3 V
  • Advanced, low power, sub-micron CMOS process
  • Industrial temperature range available
  • For other standard audio frequencies see the MK3722

Product Specification

Outputs (#)Output TypeOutput Freq Range (MHz)Input Freq (MHz)Inputs (#)Input TypeOutput Banks (#)Core Voltage (V)Output Voltage (V)
2LVCMOS3.072000 - 73.72800027.0000001Crystal23.33.3

Product Options

Orderable Part IDPart StatusPkg. CodePkg. TypeLead Count (#)Temp. GradePb (Lead) FreeCarrier TypeSample & Buy
MK3724GILFObsoletePGG16TSSOP16IYesTubeCheck Availability
MK3724GILFTRObsoletePGG16TSSOP16IYesReelCheck Availability
MK3724GLFObsoletePGG16TSSOP16CYesTubeCheck Availability
MK3724GLFTRObsoletePGG16TSSOP16CYesReelCheck Availability


Technical Documentation

Title Type Format File Size Datesort icon
Datasheets & Errata
MK3724 Datasheet Datasheet PDF 212 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 (7)
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
PCN# : TB1403-01 Changed in Carrier Tape, Plastic Reel and Quantity per Reel on TSSOP-14, TSSOP-16 Product Change Notice PDF 663 KB Apr 8, 2014
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
show all (7)
PDN# : U-13-04R1 PRODUCT DISCONTINUANCE NOTICE Product Discontinuation Notice PDF 70 KB May 28, 2013
PDN# : U-13-05 PRODUCT DISCONTINUANCE NOTICE Product Discontinuation Notice PDF 159 KB Apr 10, 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