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3.3 Volt Zero Delay Low Skew Buffer

The MK2308 is a low phase noise, high-speed PLL based, 8 output, low skew zero delay buffer. Based on IDT's proprietary low jitter Phase Locked Loop (PLL) techniques, the device provides eight low skew outputs at speeds up to 133 MHz at 3.3 V. The outputs can be generated from the PLL (for zero delay), or directly from the input (for testing), and can be set to tri-state mode or to stop at a low level. For normal operation as a zero delay buffer, any output clock is tied to the FBIN pin.


  • Clock outputs from 10 to 133 MHz
  • Zero input-output delay
  • Eight low skew (<200 ps) outputs
  • Device-to-device skew <700 ps
  • Full CMOS outputs with 25 mA output drive capability at TTL levels
  • 5 V tolerant FBIN and CLKIN pins
  • Tri-state mode for board-level testing
  • Advanced, low power, sub-micron CMOS process
  • Operating voltage of 3.3 V
  • Packaged in 16-pin SOIC and TSSOP packages
  • Available in Pb (lead) free package (SOIC, commercial only)
  • Industrial and commercial temperature operation
  • Not recommended for new designs. Use 2308B.

Product Specification

Outputs (#)Output TypeOutput Freq Range (MHz)Inputs (#)Input TypeOutput Voltage (V)Output Skew (ps)
8LVCMOS10.000000 - 133.0000001LVCMOS3.3200

Product Options

Orderable Part IDPart StatusPkg. CodePkg. TypeLead Count (#)Temp. GradePb (Lead) FreeCarrier TypeSample & Buy
MK2308S-1HLFTRLast Time BuyDCG16SOIC16CYesReelCheck Availability


Technical Documentation

Title Other Languages Type Format File Size Datesort icon
Datasheets & Errata
MK2308-2 Datasheet Datasheet PDF 185 KB Jun 28, 2012
MK2308-1H Datasheet Datasheet PDF 205 KB May 17, 2010
Apps Notes & White Papers
AN-828 Termination - LVPECL Application Note PDF 229 KB Jul 5, 2016
AN-845 Termination - LVCMOS Application Note PDF 62 KB May 13, 2014
AN-844 Termination - AC Coupling Clock Receivers Application Note PDF 82 KB May 13, 2014
show all (9)
AN-842 Thermal Considerations in Package Design and Selection Application Note PDF 403 KB May 12, 2014
AN-840 Jitter Specifications for Timing Signals Application Note PDF 349 KB May 8, 2014
AN-834 Hot-Swap Recommendations Application Note PDF 67 KB May 6, 2014
AN-827 Application Relevance of Clock Jitter Application Note PDF 1.06 MB Apr 24, 2014
AN-815 Understanding Jitter Units Application Note PDF 476 KB Apr 24, 2014
AN-805 Recommended Ferrite Beads Application Note PDF 38 KB Jan 15, 2014
PDN# : CQ-16-01 PRODUCT DISCONTINUANCE NOTICE Product Discontinuation Notice PDF 552 KB May 4, 2016
PCN# : A1602-01(R1) Add Greatek Taiwan as Alternate Assembly Product Change Notice PDF 611 KB Apr 14, 2016
PCN# : A1602-01 Add Greatek Taiwan as Alternate Assembly Product Change Notice PDF 611 KB Feb 15, 2016
IDT Clock Generation Overview 日本語 Overview PDF 1.83 MB Apr 28, 2016
IDT Clock Distribution Overview 日本語 Overview PDF 3.79 MB Apr 25, 2016

Software & Tools

Title Type Format File Size Datesort icon
MK2308-2 3.3V IBIS Model Model - IBIS ZIP 3 KB Mar 14, 2006