The MK3771-17 is a low cost, low jitter, high-perfomance VCXO and clock synthesizer designed for set-top boxes and HDTV receivers. The on-chip Voltage Controlled Crystal Oscillator accepts a 0 to 3.3 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 selectable BCLK, 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
  • Pb (lead) free package
  • HDTV frequencies of 74.25 and 74.175824 MHz
  • On-chip patented VCXO with pull range of 200 ppm (minimum)
  • VCXO tuning voltage of 0 to 3.3 V
  • Supports Ethernet with 20 and 25 MHz clocks
  • Modem clocks of 11.0592 and 24.576 MHz option
  • 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 27MHz VCXO)
  • Uses an inexpensive 13.5 MHz crystal
  • Full CMOS output swings with 12 mA output
  • drive capability at TTL levels
  • Advanced, low power, sub-micron CMOS process
  • 3.3 V ±5% operating supply

Product Options

Orderable Part ID Part Status Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
Obsolete QSOP 28 C Yes Tube
Obsolete QSOP 28 C Yes Reel

Documentation & Downloads

Title Other Languages Type Format File Size Date
Datasheets & Errata
MK3771-17 Datasheet Datasheet PDF 281 KB
Application Notes & White Papers
AN-841 Pullable Crystal Selection and VCXO Tuning Application Note PDF 334 KB
AN-848 VCXO - Crystal Selection Application Note PDF 222 KB
AN-849 Loop Filter Component Selection for VCXO Based PLLs Application Note PDF 218 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
PDN# : U-13-05R2 PRODUCT DISCONTINUANCE NOTICE (REVISED) Product Discontinuation Notice PDF 161 KB
PDN# : U-13-05R1 PRODUCT DISCONTINUANCE NOTICE Product Discontinuation Notice PDF 161 KB
PDN# : U-13-05 PRODUCT DISCONTINUANCE NOTICE Product Discontinuation Notice PDF 159 KB
PCN# : TB1303-02 Change of Tape & Reel Packing Method for Selective Products Product Change Notice PDF 361 KB