Clock Generator for Broadcom Processor

The IDT8V49N231I is a high-performance PLL-based clock generator designed to interface with Broadcom XLP2xxx processors. The IDT8V49N231I 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 IDT8V49N231I low jitter VCO easily meets PCI Express Gen 1, 2 and 3 requirements.
 
Excellent phase noise performance is maintained with IDT’s Fourth Generation FemtoClock® NG technology.

Features

  • Fourth Generation FemtoClock® NG PLL technology
  • Eleven outputs to support 133.33MHz/66.66MHz, 100MHz, 125MHz for core/DDR3, USB, SGMII/XAUI and PCIe reference clocks
  • Two 1.8V 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
  • Power supply modes:
    Core / Output
    3.3V / 3.3V (HCSL, LVDS outputs)
    3.3V / 1.8V (LVCMOS outputs only)
  • Lead-free (RoHS 6) packaging
  • -40°C to 85°C ambient operating temperature

Product Options

Orderable Part ID Part Status Pkg. Code Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
8V49N231NLGI Active NLG56P3 VFQFPN 56 I Yes Tray Availability
8V49N231NLGI8 Active NLG56P3 VFQFPN 56 I Yes Reel Availability

Technical Documentation

Title Other Languages Type Format File Size Date
Datasheets & Errata
8V49N231 Datasheet Datasheet PDF 606 KB Nov 1, 2016
Application Notes & White Papers
AN-828 Termination - LVPECL Application Note PDF 229 KB Jul 5, 2016
AN-815 Understanding Jitter Units Application Note PDF 476 KB Apr 23, 2014
AN-831 The Crystal Load curve Application Note PDF 308 KB Sep 22, 2014
AN-842 Thermal Considerations in Package Design and Selection Application Note PDF 403 KB May 11, 2014
AN-803 Crystal Timing Budget and Accuracy for IDT Timing Clock Products Application Note PDF 44 KB May 7, 2014
AN-840 Jitter Specifications for Timing Signals Application Note PDF 349 KB May 7, 2014
AN-839 RMS Phase Jitter Application Note PDF 149 KB May 6, 2014
AN-838 Peak-to-Peak Jitter Calculations Application Note PDF 32 KB May 6, 2014
AN-834 Hot-Swap Recommendations Application Note PDF 67 KB May 5, 2014
AN-832 Timing Budget and Accuracy Application Note PDF 48 KB May 5, 2014
AN-830 Quartz Crystal Drive Level Application Note PDF 59 KB May 4, 2014
AN-802 Crystal-Measuring Oscillator Negative Resistance Application Note PDF 52 KB Mar 11, 2014
AN-827 Application Relevance of Clock Jitter Application Note PDF 1.06 MB Apr 23, 2014
AN-806 Power Supply Noise Rejection Application Note PDF 353 KB Jan 14, 2014
AN-805 Recommended Ferrite Beads Application Note PDF 38 KB Jan 14, 2014
AN-801 Crystal-High Drive Level Application Note PDF 109 KB Jan 14, 2014
Other
The IDT Communications Products Advantage Overview PDF 2.54 MB Feb 13, 2017
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 24, 2016