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9FG430 - Block Diagram
9FG430 - Pinout


4-output Differential Frequency Generator for PCIe Gen3 and QPI

The 9FG430 is a Frequency Timing Generator that provides 4 HCSL differential output pairs. These outputs support PCI-Express Gen3, and QPI applications. The part supports Spread Spectrum and synthesizes several additional output frequencies from either a 14.31818 MHz crystal, a 25 MHz crystal or reference input clock. The 9FG430 also outputs a copy of the reference clock. Complete control of the device is available via strapping pins or via the SMBus inteface.


  • 4 - 0.7 V current mode differential HCSL output pairs
  • 1 - 3.3 V LVTTL REF output
  • Pin-to-Pin with 9FG104D/Easy upgrade to PCIe Gen3
  • Generates common frequencies from 14.318 MHz or 25 MHz; single part supports mulitple applications
  • Provides copy of reference output; eleminates need for additional crystal or oscillator
  • Unused outputs may be disabled in Hi-Z save system power
  • Device may be configured by SMBus and/or strap pins; can be used in systems without SMBus
  • Cycle-to-cycle jitter: < 50 ps with 25 MHz input
  • Output-to-output skew: <50 ps
  • Phase jitter: PCIe Gen3 < 1 ps RMS
  • Phase jitter: QPI 9.6 GB/s < 0.2 ps RMS
  • 10 ppm synthesis error with 25 MHz input and Spread Off

Product Specification

App Jitter ComplianceOutput TypeOutput Freq Range (MHz)Input Freq (MHz)Inputs (#)Input TypeOutput Banks (#)Core Voltage (V)Output Voltage (V)
PCIe Gen2, PCIe Gen3, PCIe Gen1LVCMOS, HCSL100.000000, 125.000000, 133.330000, 166.670000, 200.000000, 266.670000, 333.330000, 400.00000014.318180, 25.0000001LVCMOS, Crystal3.30.8, 3.3

Product Options

Orderable Part IDPart StatusPkg. CodePkg. TypeLead Count (#)Temp. GradePb (Lead) FreeCarrier TypeSample & Buy
9FG430AFILFActivePYG28SSOP28IYesTubeCheck Availability
9FG430AFILFTActivePYG28SSOP28IYesReelCheck Availability
9FG430AFLFActivePYG28SSOP28CYesTubeCheck Availability
9FG430AFLFTActivePYG28SSOP28CYesReelCheck Availability
9FG430AGILFActivePGG28TSSOP28IYesTubeCheck Availability
9FG430AGILFTActivePGG28TSSOP28IYesReelCheck Availability
9FG430AGLFActivePGG28TSSOP28CYesTubeCheck Availability
9FG430AGLFTActivePGG28TSSOP28CYesReelCheck Availability


Technical Documentation

Title Other Languages Type Format File Size Datesort icon
Datasheets & Errata
9FG430 Datasheet Datasheet PDF 210 KB Dec 6, 2011
Apps Notes & White Papers
AN-828 Termination - LVPECL Application Note PDF 229 KB Jul 5, 2016
AN-918 Programmable Clocks vs Crystal Oscillators Application Note PDF 221 KB Mar 10, 2016
AN-843 PCI Express Reference Clock Requirements Application Note PDF 1.81 MB May 13, 2014
show all (16)
AN-844 Termination - AC Coupling Clock Receivers Application Note PDF 82 KB May 13, 2014
AN-845 Termination - LVCMOS Application Note PDF 62 KB May 13, 2014
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-839 RMS Phase Jitter Application Note PDF 149 KB May 7, 2014
AN-838 Peak-to-Peak Jitter Calculations Application Note PDF 32 KB May 7, 2014
AN-836 Differential Input to Accept Single-ended Levels Application Note PDF 37 KB May 6, 2014
AN-835 Differential Input with VCMR being VIH Referenced Application Note PDF 77 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-802 Crystal-Measuring Oscillator Negative Resistance Application Note PDF 52 KB Mar 12, 2014
AN-808 PCI Express/HCSL Termination Application Note PDF 54 KB Jan 15, 2014
AN-805 Recommended Ferrite Beads Application Note PDF 38 KB Jan 15, 2014
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# : A1511-01(R1) Add SPEL India as Alternate Assembly Location Product Change Notice PDF 596 KB Jan 28, 2016
show all (9)
PCN# : A1511-01 Add SPEL India as Alternate Assembly Location Product Change Notice PDF 544 KB Nov 13, 2015
PCN# : TB1504-01R1 Qty per Reel Standardization for Selective Packages Product Change Notice PDF 95 KB Oct 22, 2015
PCN# : TB1504-01 Qty per Reel Standardization for Selective Packages Product Change Notice PDF 50 KB Jul 21, 2015
PCN# : A1403-03 Gold wire to Copper wire Product Change Notice PDF 42 KB Oct 15, 2014
PCN#: A1309-03 Additional Assembly Sources Product Change Notice PDF 398 KB Oct 21, 2013
PCN# : TB1303-02 Change of Tape & Reel Packing Method for Selective Products Product Change Notice PDF 361 KB Mar 24, 2013
IDT PCI Express Solutions Overview 简体中文, 日本語 Overview PDF 945 KB Aug 4, 2016
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

Software & Tools

Title Type Format File Size Datesort icon
9FG430A IBIS Model Model - IBIS ZIP 18 KB Nov 11, 2010

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