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8S89834I - Block Diagram
8S89834I - Pinout


Low Skew,2-to-4 LVCMOS/LVTTL-to-LVPECL/ECL Clock Multiplexer

The 8S89834I is a high speed 2-to-4 LVCMOS/LVTTL-to-LVPECL/ECL Clock Multiplexer. The 8S89834I is optimized for high speed and very low output skew, making it suitable for use in demanding applications such as SONET, 1 Gigabit and 10 Gigabit Ethernet, and Fibre Channel. The device also has an output enable pin which may be useful for system test and debug purposes. The 8S89834I is packaged in a small 3mm x 3mm 16-pin VFQFN package which makes it ideal for use in space-constrained applications.


  • Four differential LVPECL/ECL output pairs
  • Two LVCMOS/LVTTL clock inputs
  • Maximum output frequency: 1GHz
  • Output skew: 30ps (maximum)
  • Part-to-part skew: 100ps (maximum)
  • Propagation delay: 550ps (maximum)
  • Additive phase jitter, RMS: 0.12ps (typical)
  • Full 3.3V and 2.5V operating supply modes
  • -40°C to 85°C ambient operating temperature
  • Available in lead-free (RoHS 6) package

Product Specification

Outputs (#)Output TypeOutput Freq Range (MHz)Input Freq (MHz)Inputs (#)Input TypeOutput Banks (#)Core Voltage (V)Output Skew (ps)Additive Phase Jitter Typ RMS (ps)
4LVPECL, ECL0.000000 - 1000.0000000.000000 - 1000.0000002LVCMOS12.5, 3.3300.12

Product Options

Orderable Part IDPart StatusPkg. CodePkg. TypeLead Count (#)Temp. GradePb (Lead) FreeCarrier TypeSample & Buy
8S89834AKILFActiveNLG16VFQFPN16IYesTubeCheck Availability
8S89834AKILFTActiveNLG16VFQFPN16IYesReelCheck Availability


Technical Documentation

Title Other Languages Type Format File Size Datesort icon
Datasheets & Errata
8S89834I Data Sheet Datasheet PDF 309 KB Jan 27, 2016
Apps Notes & White Papers
AN-828 Termination - LVPECL Application Note PDF 229 KB Jul 5, 2016
AN-844 Termination - AC Coupling Clock Receivers Application Note PDF 82 KB May 13, 2014
AN-842 Thermal Considerations in Package Design and Selection Application Note PDF 403 KB May 12, 2014
show all (8)
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-815 Understanding Jitter Units Application Note PDF 476 KB Apr 24, 2014
AN-827 Application Relevance of Clock Jitter Application Note PDF 1.06 MB Apr 24, 2014
AN-805 Recommended Ferrite Beads Application Note PDF 38 KB Jan 15, 2014
PCN# : A1511-01(R1) Add SPEL India as Alternate Assembly Location Product Change Notice PDF 596 KB Jan 28, 2016
PCN# : A1511-01 Add SPEL India as Alternate Assembly Location Product Change Notice PDF 544 KB Nov 13, 2015
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
8S89834I IBIS Model Model - IBIS ZIP 67 KB Nov 24, 2014