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Differential-to-3.3V, 2.5V LVPECL Clock Divider and Fanout Buffer

The 8V79S674 is a clock divider and fanout buffer. The device has been designed for clock signal division in wireless base station radio equipment boards. The device is optimized to deliver excellent additive phase jitter performance. The 8V79S674 uses SiGe technology for an optimum of high clock frequency and low phase noise performance, combined with high power supply noise rejection. The device offers the frequency division by ÷1, ÷2, ÷4 and ÷8. Four low-skew LVPECL outputs are available and support clock output frequencies up to 2.5GHz (÷1 frequency division). Outputs can be disabled to save power consumption if not used. The device is packaged in a lead-free (RoHS 6) 20-lead VFQFN package. The extended temperature range supports wireless infrastructure,
telecommunication and networking end equipment requirements.


  • Clock signal division and distribution
  • SiGe technology for high-frequency and fast signal rise/fall times
  • Four low-skew LVPECL clock outputs
  • Supports frequency division of ÷1, ÷2, ÷4 and ÷8
  • Maximum frequency: 2.5GHz
  • Maximum output skew: 50ps (maximum)
  • Maximum LVPECL output rise/fall time: 200ps (maximum)
  • 3.3V or 2.5V core and output supply mode
  • Supports 1.8V I/O logic levels for all control pins
  • -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 Voltage (V)Divider ValueOutput Skew (ps)Additive Phase Jitter Typ RMS (ps)
4LVPECL0.000000 - 1250.000000, 0.000000 - 625.000000, 0.000000 - 312.500000, 0.000000 - 2500.0000000.000000 - 2500.0000001LVPECL, LVDS12.5, 3.32.5, 3.31, 2, 4, 8220.042

Product Options

Orderable Part IDPart StatusPkg. CodePkg. TypeLead Count (#)Temp. GradePb (Lead) FreeCarrier TypeSample & Buy
8V79S674NLGIActiveNLG20P1VFQFPN20IYesTubeCheck Availability
8V79S674NLGI8ActiveNLG20P1VFQFPN20IYesReelCheck Availability


Technical Documentation

Title Other Languages Type Format File Size Datesort icon
Datasheets & Errata
8V79S674 Datasheet Datasheet PDF 414 KB Apr 17, 2015
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-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
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