NOTICE - The following device(s) are recommended alternatives:
8T49N285 - FemtoClock NG Universal Frequency Translator (2-in/1-PLL/8-out)

The 844008I-46 is a 10Gb Ethernet Clock Generator and a member of the family of high performance devices from IDT. The 844008I-46 can synthesize 156.25MHz or 100MHz with a 25MHz crystal. It has a total of 8 LVDS outputs. The 844008I-46 has excellent phase jitter performance and is packaged in a 32 Lead VFQFN package, making it ideal for use in systems with limited board space.

Features

  • Eight differential LVDS outputs
  • Crystal oscillator interface designed for 18pF parallel resonant crystals
  • Supports the following output frequencies: 156.25MHz or 100MHz
  • VCO frequency: 625MHz or 600MHz
  • RMS phase jitter @ 156.25MHz, using a 25MHz crystal (1.875MHz - 20MHz): 0.45ps (typical)
  • Full 2.5V supply mode
  • -40°C to 85°C ambient operating temperature
  • Available in lead-free (RoHS 6) packages

Product Options

Orderable Part ID Part Status Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Package Buy Sample
844008AKI-46LF Obsolete VFQFPN 32 I Yes Tray Package Info
Availability
Buy / Quote
844008AKI-46LFT Obsolete VFQFPN 32 I Yes Reel Package Info
Availability
Buy / Quote

Documentation & Downloads

Title Other Languages Type Format File Size Date
Datasheets & Errata
844008I-46 Datasheet – Datasheet PDF 389 KB
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-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-832 Timing Budget and Accuracy – Application Note PDF 131 KB
AN-834 Hot-Swap Recommendations – Application Note PDF 153 KB
AN-837 Overdriving the Crystal Interface – Application Note PDF 133 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
PCNs & PDNs
PDN# : CQ-15-05 Market Declined Quarterly PDN – Product Discontinuation Notice PDF 623 KB
Downloads
844008I-46 IBIS Models – Model - IBIS ZIP 29 KB
Other
Timing Solutions Products Overview – Overview PDF 4.11 MB
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
IDT Clock Distribution Overview 日本語 Overview PDF 3.79 MB
info: For device-specific or order-specific documentation, submit a support request.

News & Additional Resources

Date
An Insider’s Guide to Finding the Right Timing Device for Your System Dec 18, 2017
Why Fanout Buffers Make More Sense Nov 28, 2017
Time for Performance Oct 11, 2017