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Low Skew Fan Out Buffers

The IDT9179-03 generates low skew clock buffers required for high speed RISC or CISC microprocessor systems such as Intel PentiumPro. Outputs will handle up to 133MHz clocks. An output enable is provided for testability. The device is a buffer with low output to output skew. This is a Fanout buffer device, not using an internal PLL. This buffer can also be a feedback to an external PLL stage for phase synchronization to a master clock. There are a total of ten outputs, sufficient for feedback to a PLL source and to drive four small outline DIMM modules (S.O. DIMM) at 2 clocks each. Or a total of ten outputs as a Fanout buffer from a common clock source. The individual clock outputs are addressable through I2C to be enabled, or stopped in a low state for reduced EMI when the lines are not needed.

Product Specification

Outputs (#)Output TypeOutput Freq Range (MHz)Inputs (#)Input TypeOutput Voltage (V)Output Skew (ps)
10LVCMOS10.000000 - 133.0000001LVCMOS3.3110

Product Options

Orderable Part IDPart StatusPkg. CodePkg. TypeLead Count (#)Temp. GradePb (Lead) FreeCarrier TypeSample & Buy
9179BF-03LFObsoletePYG28SSOP28CYesTubeCheck Availability
9179BF-03LFTObsoletePYG28SSOP28CYesReelCheck Availability


Technical Documentation

Title Other Languages Type Format File Size Datesort icon
Datasheets & Errata
9179-03 Datasheet Datasheet PDF 279 KB Feb 10, 2009
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# : K-13-01R2 PRODUCT DISCONTINUANCE NOTICE Product Discontinuation Notice PDF 125 KB Oct 3, 2013
PCN# : TB1303-02 Change of Tape & Reel Packing Method for Selective Products Product Change Notice PDF 361 KB Mar 24, 2013
PDN# : K-13-01R1 PRODUCT DISCONTINUANCE NOTICE Product Discontinuation Notice PDF 125 KB Feb 28, 2013
show all (4)
PDN# : K-13-01 PRODUCT DISCONTINUANCE NOTICE Product Discontinuation Notice PDF 122 KB Jan 16, 2013
IDT Clock Distribution Overview 日本語 Overview PDF 3.79 MB Apr 25, 2016

Software & Tools

Title Type Format File Size Datesort icon
9179-03 IBIS Model Model - IBIS ZIP 6 KB Mar 22, 2006