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MC100ES6254 - Block Diagram
MC100ES6254 - Pinout


2.5V/3.3V Differential LVPECL 2x2 Clock Switch And Fanout Buffer

MC100ES6254 is designed for very skew critical differential clock distribution systems and supports clock frequencies from DC up to 3.0 GHz. Typical applications for the MC100ES6254 are primary clock distribution, switching and loopback systems of highperformance computer, networking and telecommunication systems, as well as on-board clocking of OC-3, OC-12 and OC-48 speed communication systems. Primary purpose of the MC100ES6254 is high-speed clock switching applications. In addition, the MC100ES6254 can be configured as single 1:6 or dual 1:3 LVPECL fanout buffer for clock signals, or as loopback device in high-speed data applications. The MC100ES6254 can be operated from a 3.3 V or 2.5 V positive supply without the requirement of a negative supply line.


  • Fully differential architecture from input to all outputs
  • SiGe technology supports near-zero output skew
  • Supports DC to 3 GHz operation(1) of clock or data signals
  • LVPECL compatible differential clock inputs and outputs
  • LVCMOS compatible control inputs
  • Single 3.3 V or 2.5 V supply
  • 50 ps maximum device skew(1)
  • Synchronous output enable eliminating output runt pulse generation and metastability
  • Standard 32 lead LQFP package
  • Industrial temperature range
  • 32-lead Pb-free package available

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)
6LVPECL0.000000 - 3000.0000000.000000 - 3000.0000002LVPECL22.5, 3.350

Product Options

Orderable Part IDPart StatusPkg. CodePkg. TypeLead Count (#)Temp. GradePb (Lead) FreeCarrier TypeSample & Buy
MC100ES6254ACObsoletePRG32TQFP32CYesTrayCheck Availability
MC100ES6254ACR2ObsoletePRG32TQFP32CYesReelCheck Availability


Technical Documentation

Title Other Languages Type Format File Size Datesort icon
Datasheets & Errata
MC100ES6254 Datasheet Datasheet PDF 352 KB Jan 7, 2013
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 (11)
AN-840 Jitter Specifications for Timing Signals Application Note PDF 349 KB May 8, 2014
AN-836 Differential Input to Accept Single-ended Levels Application Note PDF 37 KB May 6, 2014
AN-833 Differential Input Self Oscillation Prevention Application Note PDF 94 KB May 6, 2014
AN-835 Differential Input with VCMR being VIH Referenced Application Note PDF 77 KB May 6, 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
PCN# : A1401-02 Alternate Copper Wire Assembly Site Product Change Notice PDF 36 KB Feb 16, 2014
PDN# : N-12-22R2 PRODUCT DISCONTINUANCE NOTICE Product Discontinuation Notice PDF 363 KB Jun 14, 2013
PCN# : TB1303-01 Change of Carrier Tape for TQFP-32, TQFP-48 Product Change Notice PDF 472 KB Mar 31, 2013
show all (5)
PDN# : N-12-22R1 PRODUCT DISCONTINUANCE NOTICE Product Discontinuation Notice PDF 209 KB Feb 28, 2013
PCN# : A-0610-02 ASAT China as Alternate Facility for CABGA/CVBGA/FPBGA/TQFP/PQFP Product Change Notice PDF 252 KB Oct 19, 2006
IDT Clock Distribution Overview 日本語 Overview PDF 3.79 MB Apr 25, 2016

Software & Tools

Title Type Format File Size Datesort icon
MC100ES6254 3.3V IBIS Model Model - IBIS ZIP 10 KB Jan 29, 2010