The MK3722 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 (lead) free package
  • Replaces a VCXO and oscillator
  • Operating voltage of 3.3V
  • 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

Product Options

Orderable Part ID Part Status Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
Obsolete 16 C Yes Tube
Obsolete 16 C Yes Reel

Documentation & Downloads

Title Other Languages Type Format File Size Date
Datasheets & Errata
MK3722 Datasheet Datasheet PDF 236 KB
Application Notes & White Papers
AN-841 Pullable Crystal Selection and VCXO Tuning Application Note PDF 334 KB
AN-849 Loop Filter Component Selection for VCXO Based PLLs Application Note PDF 218 KB
AN-848 VCXO - Crystal Selection Application Note PDF 222 KB
AN-847 VCXO - Absolute Pull Range Application Note PDF 155 KB
AN-800 Approved VCXO Crystals Application Note PDF 150 KB
Using IDT's Integrated VCXO Products MAN05 Application Note PDF 231 KB
Ferrite Bead Recommendations Application Note PDF 82 KB
PDN# : CQ-14-06R1 Revised Product Discontinuance Notice Product Discontinuation Notice PDF 407 KB
PDN# : CQ-14-06 MANUFACTURING DISCONTINUANCE NOTICE Product Discontinuation Notice PDF 192 KB
PCN# : TB1403-01 Changed in Carrier Tape, Plastic Reel and Quantity per Reel on TSSOP-14, TSSOP-16 Product Change Notice PDF 663 KB
PCN# : TB1303-02 Change of Tape & Reel Packing Method for Selective Products Product Change Notice PDF 361 KB
PCN# : A1208-01R1 Gold to Copper Wire Product Change Notice PDF 254 KB