Low Skew, ÷1/÷2,3.3V LVPECL /ECLClock Generator

The 87322BI is a low skew, ÷1/÷2 3.3V LVPECL/ECL Clock Generator. Using multiplexed/redundant clock inputs the 87322BI is designed to translate most differential signal levels to LVPECL/ECL levels. The CLK_SEL input selects between CLK0, nCLK0 and CLK1, nCLK1 as the active input. The divide select inputs, DIV_SELA, DIV_SELB, DIV_SELC, DIV_SELD, control the output frequency of each bank. The outputs can be utilized in the ÷1, ÷2 or a combination of ÷1 and ÷2 modes. The master reset input can be used to reset the internal dividers and disable the clock outputs. Disabled outputs QAx, QBx, QCx and QDx will be forced low. Disabled outputs nQAx, nQBx, nQCx and nQDx will be forced high. The 87322BI is characterized across the industrial temperature range and over the supply voltage range of 3V to 3.8V for LVPECL and -3.8V to -3V for LVECL/ECL. Guaranteed output and part to part skew characteristics make the 87322BI an excellent choice for clock generator and clock distribution applications demanding well defined performance and repeatability.


  • Fifteen differential LVPECL outputs
  • Selectable LVPECL differential clock inputs
  • CLK0, nCLK0 and CLK1, nCLK1 can accept the following differential input levels: LVPECL, LVDS, CML, SSTL
  • Output frequency: 750MHz (maximum)
  • Output skew: 180ps (maximum)
  • Bank skew: 65ps (maximum)
  • Part-to-part skew: 500ps (maximum)
  • LVPECL mode operating voltage supply range: VCC = 3V to 3.8V, VEE = 0V
  • ECL mode operating voltage supply range: VCC = 0V, VEE = -3.8V to -3V
  • -40°C to 85°C ambient operating temperature
  • Lead-Free package fully RoHS compliant

Product Options

Orderable Part ID Part Status Pkg. Code Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
87322BYILF Obsolete PPG52 TQFP 52 I Yes Tray
87322BYILFT Obsolete PPG52 TQFP 52 I Yes Reel

Technical Documentation

Title Other Languages Type Format File Size Date
Datasheets & Errata
ICS87322BI Data Sheet Datasheet PDF 219 KB Nov 15, 2015
Application 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 12, 2014
AN-842 Thermal Considerations in Package Design and Selection Application Note PDF 403 KB May 11, 2014
AN-835 Differential Input with VCMR being VIH Referenced Application Note PDF 77 KB May 10, 2014
AN-840 Jitter Specifications for Timing Signals Application Note PDF 349 KB May 7, 2014
AN-834 Hot-Swap Recommendations Application Note PDF 67 KB May 5, 2014
AN-833 Differential Input Self Oscillation Prevention Application Note PDF 94 KB May 5, 2014
AN-836 Differential Input to Accept Single-ended Levels Application Note PDF 37 KB May 5, 2014
AN-827 Application Relevance of Clock Jitter Application Note PDF 1.06 MB Apr 23, 2014
AN-815 Understanding Jitter Units Application Note PDF 476 KB Apr 23, 2014
AN-805 Recommended Ferrite Beads Application Note PDF 38 KB Jan 14, 2014
PDN# : CQ-16-02 Quarter PDN for Declined Market Product Discontinuation Notice PDF 592 KB Aug 24, 2016
PCN# : A1401-02 Alternate Copper Wire Assembly Site Product Change Notice PDF 36 KB Feb 15, 2014
PCN#: A1309-03 Additional Assembly Sources Product Change Notice PDF 398 KB Oct 20, 2013
PCN# : A1309-01 Changed of Traceability Mark Format Product Change Notice PDF 439 KB Oct 10, 2013
PDN# : N-12-22R2 PRODUCT DISCONTINUANCE NOTICE Product Discontinuation Notice PDF 363 KB Jun 13, 2013
Timing Solutions Products Overview Overview PDF 4.11 MB Oct 31, 2018
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 24, 2016