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553 - Block Diagram
553 - Pinout


Low Skew 1 to 4 Clock Buffer

Alternative Products
NOTICE - The following device(s) are recommended alternatives:
Improved jitter performance, smaller package, 1.8V to 3.3V supply voltage

The 553 is a low skew, single input to four output, clock buffer. Part of IDT's ClockBlocksTM family, this is our lowest skew, small clock buffer. See the 552-02 for a 1 to 8 low skew buffer. For more than eight outputs, see the MK74CBxxx BuffaloTM series of clock drivers. IDT makes many non-PLL and PLL based low skew output devices as well as Zero Delay Buffers to synchronize clocks. Contact us for all of your clocking needs.


  • Extremely low skew outputs (50 ps maximum)
  • Packaged in 8-pin SOIC
  • Pb (lead) free package
  • Low power CMOS technology
  • Operating voltages of 2.5 V to 5 V
  • Output Enable pin tri-states outputs
  • 5 V tolerant input clock
  • Commercial (0 to +70°C) and Industrial (-40 to +85°C) temperature ranges available

Product Specification

Outputs (#)Output TypeOutput Freq Range (MHz)Input Freq (MHz)Inputs (#)Input TypeOutput Banks (#)Core Voltage (V)Output Voltage (V)Divider ValueOutput Skew (ps)Additive Phase Jitter Typ RMS (ps)
4LVCMOS0.000000 - 200.0000000.000000 - 200.0000001LVCMOS12.5, 3.3, 52.5, 3.3, 550

Product Options

Orderable Part IDPart StatusPkg. CodePkg. TypeLead Count (#)Temp. GradePb (Lead) FreeCarrier TypeSample & Buy
553MILFActiveDCG8SOIC8IYesTubeCheck Availability
553MILFTActiveDCG8SOIC8IYesReelCheck Availability
553MLFActiveDCG8SOIC8CYesTubeCheck Availability
553MLFTActiveDCG8SOIC8CYesReelCheck Availability


Technical Documentation

Title Other Languages Type Format File Size Datesort icon
Datasheets & Errata
553 Datasheet Datasheet PDF 86 KB Mar 23, 2012
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 (11)
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-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
AN-804 IDT Clock Buffers Offer Low Additive Phase Jitter Application Note PDF 162 KB Jan 15, 2014
IDT Clock Buffers Offers Ultra Low Additive Phase Jitter Application Note PDF 1 KB Oct 20, 2008
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
PCN# : TB1504-01R1 Qty per Reel Standardization for Selective Packages Product Change Notice PDF 95 KB Oct 22, 2015
show all (8)
PCN# : TB1504-01 Qty per Reel Standardization for Selective Packages Product Change Notice PDF 50 KB Jul 21, 2015
PCN# : A1309-01 Changed of Traceability Mark Format Product Change Notice PDF 439 KB Oct 11, 2013
PCN# : TB1303-02 Change of Tape & Reel Packing Method for Selective Products Product Change Notice PDF 361 KB Mar 24, 2013
PCN# : A1208-01R1 Gold to Copper Wire Product Change Notice PDF 254 KB Dec 21, 2012
PCN# A-0607-06 MMT Thailand as Alternate Assembly Facility for PLCC, SOIC 150mil/300mil Product Change Notice PDF 223 KB Oct 6, 2006
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
IDT Fanout Buffers Product Overview Product Brief PDF 739 KB Feb 17, 2015

Software & Tools

Title Type Format File Size Datesort icon
553 2.5V IBIS Model Model - IBIS ZIP 9 KB Aug 13, 2013