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5V41235 - Block Diagram
5V41235 - Pinout


2 Output PCIe GEN1/2/3 Synthesizer

The 5V41235 is a PCIe Gen2/3 compliant spread spectrum capable clock generator. The device has 2 differential HCSL outputs and can be used in communication or embedded systems to substantially reduce electro-magnetic interference (EMI). The spread amount and output frequency are selectable via select pins. The 5V41235 can also supply 25 MHz, 125 MHz and 200 MHz outputs for applications such as Ethernet.


  • 2 - 0.7V current mode differential HCSL output pairs
  • 16-pin TSSOP and MLF packages; small board footprint
  • Spread-spectrum capable; reduces EMI
  • Outputs can be terminated to LVDS; can drive a wider variety of devices
  • 25 MHz, 125 MHz and 200 MHz output frequencies; TSSOP only 
  • 100MHz and 200MHz output frequencies; MLF package
  • OE control pin; greater system power management
  • Spread% and frequency pin selection; no software required to configure device
  • Industrial temperature range available; supports demanding embedded applications
  • Cycle-to-cycle jitter < 100 ps
  • Output-to-output skew < 50 ps
  • PCIe Gen2 phase jitter < 3.0ps RMS
  • PCIe Gen3 phase jitter <1.0ps RMS

Product Specification

Output TypeOutput Freq Range (MHz)Input Freq (MHz)Inputs (#)Input TypeOutput Banks (#)Core Voltage (V)Output Voltage (V)
HCSL25.000000, 100.000000, 125.000000, 200.00000025.0000001LVCMOS, Crystal13.33.3

Product Options

Orderable Part IDPart StatusPkg. CodePkg. TypeLead Count (#)Temp. GradePb (Lead) FreeCarrier TypeSample & Buy
5V41235NLGActiveNLG16VFQFPN16CYesTubeCheck Availability
5V41235NLG8ActiveNLG16VFQFPN16CYesReelCheck Availability
5V41235NLGIActiveNLG16VFQFPN16IYesTubeCheck Availability
5V41235NLGI8ActiveNLG16VFQFPN16IYesReelCheck Availability
5V41235PGGActivePGG16TSSOP16CYesTubeCheck Availability
5V41235PGG8ActivePGG16TSSOP16CYesReelCheck Availability
5V41235PGGIActivePGG16TSSOP16IYesTubeCheck Availability
5V41235PGGI8ActivePGG16TSSOP16IYesReelCheck Availability


Technical Documentation

Title Other Languages Type Format File Size Datesort icon
Datasheets & Errata
5V41235 Datasheet Datasheet PDF 146 KB Oct 11, 2016
Errata# : UEN-12-12 Errata Notification on 5V41235 Datasheet PDF 255 KB Oct 24, 2012
Apps Notes & White Papers
AN-828 Termination - LVPECL Application Note PDF 229 KB Jul 5, 2016
AN-843 PCI Express Reference Clock Requirements Application Note PDF 1.81 MB May 13, 2014
AN-844 Termination - AC Coupling Clock Receivers Application Note PDF 82 KB May 13, 2014
show all (14)
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-838 Peak-to-Peak Jitter Calculations Application Note PDF 32 KB May 7, 2014
AN-839 RMS Phase Jitter Application Note PDF 149 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-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-802 Crystal-Measuring Oscillator Negative Resistance Application Note PDF 52 KB Mar 12, 2014
AN-805 Recommended Ferrite Beads Application Note PDF 38 KB Jan 15, 2014
AN-808 PCI Express/HCSL Termination Application Note PDF 54 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 (5)
PCN# : A1511-01 Add SPEL India as Alternate Assembly Location Product Change Notice PDF 544 KB Nov 13, 2015
PCN# : TB1403-01 Changed in Carrier Tape, Plastic Reel and Quantity per Reel on TSSOP-14, TSSOP-16 Product Change Notice PDF 663 KB Apr 8, 2014
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
5V41235 IBIS Model Model - IBIS ZIP 4 KB Dec 11, 2013

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