The IDT8V49N211NLI is a high-performance PLL-based clock generator designed to interface with Broadcom XLP2xxx processors. The IDT8V49N211I has one 25MHz crystal input to generate output frequencies to support XLP Core/DDR3, USB, SGMII/XAUI and PCIe reference clocks in a single chip. The IDT8V49N211I low jitter VCO easily meets PCI Express Gen 1, 2 and 3 requirements.
IDT’s Fourth Generation FemtoClock® NG technology has best in class phase noise performance.


  • Fourth Generation FemtoClock® NG PLL technology
  • Two LVCMOS clock outputs for core/DDR3 at 133.33MHz or 66.66MHz
  • One LVDS clock output for USB at 100MHz
  • Three LVDS clock outputs for SGMII/XAUI at 125MHz
  • Five HCSL clock outputs for PCIe at 100MHz
  • Crystal oscillator interface designed for 25MHz, parallel resonant crystal
  • PCI Express Gen 1 (2.5Gb/s), Gen 2 (5Gb/s) and Gen 3 (8Gb/s) jitter compliant
  • Full 3.3V operating supply voltage
  • Lead-free (RoHS 6) packaging
  • -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
Obsolete VFQFPN 56 I Yes Tray
Obsolete VFQFPN 56 I Yes Reel

Documentation & Downloads

Title Other Languages Type Format File Size Date
Datasheets & Errata
8V49N211 Datasheet Datasheet PDF 1.01 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-846 Termination - LVDS Application Note PDF 133 KB
AN-845 Termination - LVCMOS Application Note PDF 146 KB
AN-842 Thermal Considerations in Package Design and Selection Application Note PDF 495 KB
AN-803 Crystal Timing Budget and Accuracy for IDT Timing Clock Products Application Note PDF 128 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-834 Hot-Swap Recommendations Application Note PDF 153 KB
AN-837 Overdriving the Crystal Interface Application Note PDF 133 KB
AN-832 Timing Budget and Accuracy Application Note PDF 131 KB
AN-830 Quartz Crystal Drive Level Application Note PDF 143 KB
AN-827 Application Relevance of Clock Jitter Application Note PDF 1.15 MB
AN-815 Understanding Jitter Units Application Note PDF 565 KB
AN-802 Crystal-Measuring Oscillator Negative Resistance Application Note PDF 136 KB
AN-801 Crystal-High Drive Level Application Note PDF 202 KB
AN-806 Power Supply Noise Rejection Application Note PDF 438 KB
AN-805 Recommended Ferrite Beads Application Note PDF 121 KB
PCN# : A1904-01 Add Greatek, Taiwan as an Alternate Assembly Facility Product Change Notice PDF 983 KB
IDT Products for Radio Applications 日本語 Product Brief PDF 2.34 MB
IDT Clock Generation Overview 日本語 Overview PDF 1.83 MB