The IDT8V41N004I is a clock generator designed for Gigabit Ethernet, 10 Gigabit Ethernet, SGMII and PCI Express™ applications. The device generates a selectable 100MHz, 125MHz, 156.25MHz or 312.5MHz clock signal from 25MHz input. The IDT8V41N004I uses IDT’s fourth generation FemtoClock®NG technology to provide low phase noise performance, combined with excellent power supply noise rejection for optimal performance in the targeted applications. The device supports a 3.3V supply voltage and is packaged in a compact, lead-free (RoHS 6) 32-lead VFQFN package. The industrial temperature range supports high end computing, telecommunication and networking end equipment requirements.



  • Fourth generation FemtoClock® NG technology
  • Four 100MHz, 125MHz, 156.25MHz and 312.5MHz clocks for Gigabit Ethernet, 10 Gigabit Ethernet, SGMII and PCI Express applications, HCSL interface levels
  • Selectable external crystal or differential input source
  • Crystal oscillator interface designed for 25MHz parallel resonant crystal
  • Differential CLK, nCLK input pair accepts LVPECL, LVDS, LVHSTL, HCSL input levels
  • Internal resistor bias on nCLK pin allows the user to drive CLK input with external single-ended (LVCMOS/ LVTTL) input levels
  • PCI Express Gen1, Gen2, and Gen 3 compliant
  • RMS phase jitter 156.25MHz (12kHz - 20MHz): 0.217ps
  • Full 3.3V supply voltage
  • -40°C to 85°C ambient operating temperature

Product Options

Part Number Part Status Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
Active VFQFPN 32 I Yes Tray
Active VFQFPN 32 I Yes Reel


Title language Type Format File Size Date
Datasheets & Errata
8V41N004I Datasheet Datasheet PDF 1.53 MB
Application Notes & White Papers
AN-828 Termination - LVPECL Application Note PDF 322 KB
AN-831 The Crystal Load curve Application Note PDF 395 KB
AN-844 Termination - AC Coupling Clock Receivers Application Note PDF 170 KB
AN-842 Thermal Considerations in Package Design and Selection Application Note PDF 495 KB
AN-840 Jitter Specifications for Timing Signals Application Note PDF 442 KB
AN-838 Peak-to-Peak Jitter Calculations Application Note PDF 115 KB
AN-839 RMS Phase Jitter Application Note PDF 233 KB
AN-832 Timing Budget and Accuracy Application Note PDF 131 KB
AN-834 Hot-Swap Recommendations Application Note PDF 153 KB
AN-835 Differential Input with VCMR being VIH Referenced Application Note PDF 160 KB
AN-836 Differential Input to Accept Single-ended Levels Application Note PDF 120 KB
AN-837 Overdriving the Crystal Interface Application Note PDF 133 KB
AN-830 Quartz Crystal Drive Level Application Note PDF 143 KB
AN-815 Understanding Jitter Units Application Note PDF 565 KB
AN-827 Application Relevance of Clock Jitter Application Note PDF 1.15 MB
AN-802 Crystal-Measuring Oscillator Negative Resistance Application Note PDF 136 KB
AN-801 Crystal-High Drive Level Application Note PDF 202 KB
AN-805 Recommended Ferrite Beads Application Note PDF 121 KB
AN-806 Power Supply Noise Rejection Application Note PDF 438 KB
AN-803 Crystal Timing Budget and Accuracy for Renesas Timing Clock Products Application Note PDF 108 KB
PCN# : A1904-01 Add Greatek, Taiwan as an Alternate Assembly Facility Product Change Notice PDF 983 KB
PCN# : A1611-02 Add JCET China as Alternate Assembly and Change of Material Set at Alternate Assembly Location Product Change Notice PDF 583 KB
PCN# : A1511-01(R1) Add SPEL India as Alternate Assembly Location Product Change Notice PDF 596 KB
PCN# : A1511-01 Add SPEL India as Alternate Assembly Location Product Change Notice PDF 544 KB
PCN# : W1308-01 Change of Passivation Thickness Product Change Notice PDF 941 KB
PDN# : TP-19-06-A1 Addendum to Remove 810N322BKI-02LF, 810N322BKI-02LFT, 8V41N004NLGI and 8V41N004NLGI8 from PDN Product Discontinuation Notice PDF 819 KB
PDN# : TP-19-06 Manufacturing Discontinuance Notice Product Discontinuation Notice PDF 1016 KB
IDT Clock Generation Overview 日本語 Overview PDF 1.83 MB


Title language Type Format File Size Date
8V41N004I IBIS Model Model - IBIS ZIP 82 KB