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874208I - Block Diagram
874208I - Pinout


2.5V Differential LVDS Clock Divider And Fanout Buffer

The 874208I is a high-performance differential LVDS clock divider and fanout buffer. The device is designed for the frequency division and signal fanout of high-frequency, low phase-noise clocks. The 874208I is characterized to operate from a 2.5V power supply. Guaranteed output-to-output and part-to-part skew characteristics make the 874208I ideal for those clock distribution applications demanding well-defined performance and repeatability. The integrated input termination resistors make interfacing to the reference source easy and reduce passive component count. Each output can be individually enabled or disabled in the high-impedance state controlled by a I2C register. On power-up, all outputs are enabled.


  • One differential input reference clock
  • Differential pair can accept the following differential input levels: LVDS, LVPECLCML
  • Integrated input termination resistors
  • Eight LVDS outputs
  • Selectable clock frequency division of ÷1, ÷2, ÷4 and ÷8
  • Maximum input clock frequency: 500MHz
  • LVCMOS interface levels for the control inputs
  • Internal regulator for improved noise immunity
  • Individual output enable/disabled by I2C interface
  • Output skew: 28ps
  • Additive Phase Jitter, RMS: 0.168ps (typical), 125MHz
  • Low additive phase jitter
  • Full 2.5V supply voltage
  • Available in Lead-free (RoHS 6) package
  • -40°C to 85°C ambient operating temperature

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)
8LVDS0.000000 - 500.0000000.000000 - 500.0000001LVDS, LVPECL, CML12.52.51, 2, 4, 8600.124

Product Options

Orderable Part IDPart StatusPkg. CodePkg. TypeLead Count (#)Temp. GradePb (Lead) FreeCarrier TypeSample & Buy
874208BKILFActiveNLG32P3VFQFPN32IYesTrayCheck Availability
874208BKILFTActiveNLG32P3VFQFPN32IYesReelCheck Availability


Technical Documentation

Title Other Languages Type Format File Size Datesort icon
Datasheets & Errata
ICS874208I DATASHEET Datasheet PDF 292 KB Sep 22, 2014
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-846 Termination - LVDS Application Note PDF 50 KB May 13, 2014
show all (12)
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-835 Differential Input with VCMR being VIH Referenced Application Note PDF 77 KB May 6, 2014
AN-836 Differential Input to Accept Single-ended Levels Application Note PDF 37 KB May 6, 2014
AN-834 Hot-Swap Recommendations Application Note PDF 67 KB May 6, 2014
AN-833 Differential Input Self Oscillation Prevention Application Note PDF 94 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
PCN# : A1511-01(R1) Add SPEL India as Alternate Assembly Location Product Change Notice PDF 596 KB Jan 28, 2016
PCN# : A1511-01 Add SPEL India as Alternate Assembly Location Product Change Notice PDF 544 KB Nov 13, 2015
PCN# : A1403-03 Gold wire to Copper wire Product Change Notice PDF 42 KB Oct 15, 2014
show all (4)
PCN# : N1408-01 Datasheet Change on 874208BKILF Product Change Notice PDF 91 KB Sep 9, 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