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

The 844246I is a Crystal-to-LVDS Clock Synthesizer/Fanout Buffer designed for Fibre Channel and Gigabit Ethernet applications. The output frequency can be set using the frequency select pins and a 25MHz crystal for Ethernet frequencies, or a 26.5625MHz crystal for a Fibre Channel. The low phase noise characteristics of the 844246I make it an ideal clock for these demanding applications.

Features

  • Six LVDS output pairs
  • Crystal oscillator interface
  • Output frequency range: 53.125MHz to 333.3333MHz
  • Crystal input frequency range: 25MHz to 33.333MHz
  • RMS phase jitter @ 125MHz, using a 25MHz crystal (1.875MHz - 20MHz): 0.63ps (typical)
  • Full 3.3V or mixed 3.3V core, 2.5V output supply modes
  • -40°C to 85°C ambient operating temperature
  • Available in lead-free (RoHS 6) package

Product Options

Orderable Part ID Part Status Pkg. Code Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
844246DGILF Obsolete EJG24 TSSOP 24 I Yes Tube
Availability
844246DGILFT Obsolete EJG24 TSSOP 24 I Yes Reel
Availability

Technical Documentation

Title Other Languages Type Format File Size Date
Datasheets & Errata
ICS844246DI Datasheet Datasheet PDF 269 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-803 Crystal Timing Budget and Accuracy for IDT Timing Clock Products Application Note PDF 44 KB
AN-840 Jitter Specifications for Timing Signals Application Note PDF 349 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
PDN# : CQ-17-04 Product Discontinuance Notice Product Discontinuation Notice PDF 599 KB
PCN# : A1606-02 Add Greatek Taiwan as Alternate Assembly Product Change Notice PDF 567 KB
PCN# : A1309-01 Changed of Traceability Mark Format Product Change Notice PDF 439 KB
PCN# : TB1303-02 Change of Tape & Reel Packing Method for Selective Products Product Change Notice PDF 361 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