NOTICE - The following device(s) are recommended alternatives:
8T49N242 - FemtoClock®NG Universal Frequency Translator

The 844001 is a Fibre Channel Clock Generator and a member of the family of high performance devices from IDT. The 844001 uses an 18pF parallel resonant crystal over the range of 20.4MHz - 28.3MHz. For Fibre Channel applications, a 26.5625MHz crystal is used. The frequency select pin allows the device to generate either 106.25MHz or 212.5MHz from a 26.5625MHz crystal. To generate 187.5MHz for 12Gb Ethernet, a 23.4375MHz crystal is used. The 844001 uses IDT's 3rd generation low phase noise VCO technology and can achieve <1ps typical rms phase jitter, easily meeting Fibre Channel and Ethernet jitter requirements. The 844001 is packaged in a small 8-pin TSSOP, making it ideal for use in systems with limited board space.

Features

  • One Differential LVDS output
  • Crystal oscillator interface, 18pF parallel resonant crystal (20.4MHz - 28.3MHz)
  • Output frequency range: 81.66MHz - 226.66MHz
  • VCO range: 490MHz - 680MHz
  • RMS phase jitter @ 106.25MHz, using a 26.5625MHz crystal (637kHz - 10MHz): 0.74ps (typical)
  • 3.3V or 2.5V operating supply
  • 0°C to 70°C ambient operating temperature
  • Available in lead-free (RoHS 6) package

Product Options

Orderable Part ID Part Status Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
844001AGLF
Package Info
Env. Documentation
 Obsolete TSSOP 8 C Yes Tube
Availability
Buy / Quote
844001AGLFT
Package Info
Env. Documentation
 Obsolete TSSOP 8 C Yes Reel
Availability
Buy / Quote

Documentation & Downloads

Title Other Languages Type Format File Size Date
Datasheets & Errata
844001 Datasheet – Datasheet PDF 302 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-16-01 PRODUCT DISCONTINUANCE NOTICE – Product Discontinuation Notice PDF 552 KB
PCN# : A1602-01(R1) Add Greatek Taiwan as Alternate Assembly – Product Change Notice PDF 611 KB
PCN# : A1602-01 Add Greatek Taiwan as Alternate Assembly – Product Change Notice PDF 611 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# : TB1303-02 Change of Tape & Reel Packing Method for Selective Products – Product Change Notice PDF 361 KB
Downloads
844001 IBIS Model – Model - IBIS ZIP 9 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
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