NOTICE - The following device(s) are recommended alternatives:

The 844031-01 is an Ethernet Clock Generator and a member of the HiPerClocksTM family of high performance devices from IDT. The 844031-01 uses an 18pF parallel resonant crystal over the range of 19.6MHz - 27.2MHz. For Ethernet applications, a 25MHz crystal is used to generate 312.5MHz. The 844031-01 has excellent <1ps phase jitter performance, over the 1.875MHz - 20MHz integration range. The 844031- 01 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 (19.6MHz - 27.2MHz)
  • Output frequency range: 245MHz - 340MHz
  • VCO range: 490MHz - 680MHz
  • RMS phase jitter @ 312.5MHz, using a 25MHz crystal (1.875MHz - 20MHz): 0.53ps (typical)
  • 3.3V or 2.5V operating supply
  • 0°C to 70°C ambient operating temperature
  • Available in both standard (RoHS 5) and lead-free (RoHS 6) packages

Product Options

Part Number Part Status Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
Obsolete TSSOP 8 C Yes Tube
Availability
Obsolete TSSOP 8 C Yes Reel
Availability

Documentation & Downloads

Title language Type Format File Size Date
Datasheets & Errata
844031-01 Final Data Sheet Datasheet PDF 343 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-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
AN-803 Crystal Timing Budget and Accuracy for Renesas Timing Clock Products Application Note PDF 108 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
844031-01 IBIS Model Model - IBIS ZIP 63 KB
Other
IDT Clock Generation Overview 日本語 Overview PDF 1.83 MB