The 9DS400 is a 4-output PCIe PLL with the ability to inject spread spectrum onto the incoming differential clock, while maintaining good phase noise.


  • 4- 0.7V current-mode differential output pairs
  • Supports Spread Injection mode and fanout mode
  • Two pin selectable down spread amounts: 0.5% and 0.25%
  • 50-110 MHz operation in PLL mode
  • 50-400 MHz operation in Bypass mode
  • Bypass mode
  • Supports undriven differential outputs in PD# and SRC_STOP# modes for power management
  • Output cycle-cycle jitter < 50ps
  • Output to Output skew <50ps
  • Phase jitter: PCIe Gen1 < 86ps peak to peak
  • Phase jitter: PCIe Gen2 < 3.0/3.1ps rms

Product Options

Orderable Part ID Part Status Pkg. Code Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
9DS400AGLF Obsolete PGG28 TSSOP 28 C Yes Tube
9DS400AGLFT Obsolete PGG28 TSSOP 28 C Yes Reel

Technical Documentation

Title Other Languages Type Format File Size Date
Datasheets & Errata
9DS400 Datasheet Datasheet PDF 318 KB Nov 15, 2011
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-843 PCI Express Reference Clock Requirements Application Note PDF 1.81 MB May 12, 2014
AN-842 Thermal Considerations in Package Design and Selection Application Note PDF 403 KB May 11, 2014
AN-840 Jitter Specifications for Timing Signals Application Note PDF 349 KB May 7, 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-13-03 Q2FY14 Quarter PDN for Declined Market Product Discontinuation Notice PDF 303 KB Oct 26, 2013
PCN# : TB1303-02 Change of Tape & Reel Packing Method for Selective Products Product Change Notice PDF 361 KB Mar 23, 2013
IDT Clock Distribution Overview 日本語 Overview PDF 3.79 MB Apr 24, 2016
Spread Injection PLL Clock Buffer - product flyer Flyer PDF 320 KB Sep 28, 2009
Spread Injection PLL Clock Buffer - product flyer Flyer PDF 320 KB Sep 28, 2009