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

The 844008I-01 is an 8 output LVDS Synthesizer optimized to generate GbE/10GbE reference clock frequencies and is a member of the HiPerClocksTM family of high performance clock solutions from IDT. Using a 25MHz parallel resonant crystal, the following frequencies can be generated based on the F_SEL pin: 125MHz or 156.25MHz. The 844008I-01 uses IDT's 3rd generation low phase noise VCO technology and can achieve <1ps typical rms phase jitter, easily meeting GbE/10GbE jitter requirements. The 844008I-01 is packaged in a 32-pin TQFP or 32 VFQFN packages.

Features

  • Eight LVDS outputs
  • Crystal oscillator interface
  • Supports the following output frequencies: 125MHz or 156.25MHz
  • VCO: 625MHz
  • RMS phase jitter @ 156.25MHz, using a 25MHz crystal (1.875MHz - 20MHz): 0.38ps (typical)
  • Full 3.3V 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. Code Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
844008AKI-01LF Obsolete NLG32 VFQFPN 32 I Yes Tray
Availability
Buy / Quote
844008AYI-01LF Obsolete DXG32 PTQFP 32 I Yes Tray
Availability
Buy / Quote
844008AYI-01LFT Obsolete DXG32 PTQFP 32 I Yes Reel
Availability
Buy / Quote

Technical Documentation

Title Other Languages Type Format File Size Date
Datasheets & Errata
844008I-01 Datasheet – Datasheet PDF 499 KB
Application Notes & White Papers
AN-828 Termination - LVPECL – Application Note PDF 229 KB
AN-831 The Crystal Load curve – Application Note PDF 308 KB
AN-846 Termination - LVDS – Application Note PDF 50 KB
AN-842 Thermal Considerations in Package Design and Selection – Application Note PDF 403 KB
AN-840 Jitter Specifications for Timing Signals – Application Note PDF 349 KB
AN-803 Crystal Timing Budget and Accuracy for IDT Timing Clock Products – Application Note PDF 44 KB
AN-838 Peak-to-Peak Jitter Calculations – Application Note PDF 32 KB
AN-839 RMS Phase Jitter – Application Note PDF 149 KB
AN-832 Timing Budget and Accuracy – Application Note PDF 48 KB
AN-834 Hot-Swap Recommendations – Application Note PDF 67 KB
AN-837 Overdriving the Crystal Interface – Application Note PDF 50 KB
AN-830 Quartz Crystal Drive Level – Application Note PDF 59 KB
AN-815 Understanding Jitter Units – Application Note PDF 476 KB
AN-827 Application Relevance of Clock Jitter – Application Note PDF 1.06 MB
AN-802 Crystal-Measuring Oscillator Negative Resistance – Application Note PDF 52 KB
AN-805 Recommended Ferrite Beads – Application Note PDF 38 KB
AN-806 Power Supply Noise Rejection – Application Note PDF 353 KB
AN-801 Crystal-High Drive Level – Application Note PDF 109 KB
PCNs & PDNs
PDN# : CQ-17-04(R1) Product Discontinuance Notice – Product Discontinuation Notice PDF 606 KB
PCN# : A1709-02 Add alternate assembly at OSET and Convert to Copper Wire – Product Change Notice PDF 35 KB
PDN# : CQ-17-04 Product Discontinuance Notice – Product Discontinuation Notice PDF 599 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

Software & Tools

Title Other Languages Type Format File Size Date
844008I-01 IBIS Model – Model - IBIS ZIP 33 KB
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