The 844004-104 is a 4 output LVDS Synthesizer optimized to generate Fibre Channel reference clock frequencies. Using a 26.5625MHz 18pF parallel resonant crystal, the following frequencies can be generated based on the 2 frequency select pins (F_SEL[1:0]): 212.5MHz, 187.5MHz, 159.375MHz, 106.25MHz and 53.125MHz. The 844004-104 uses IDT's 3rd generation low phase noise VCO technology and can achieve <1ps typical rms phase jitter, easily meeting Fibre Channel jitter requirements. The 844004-104 is packaged in a 32-pin VFQFN package.

Features

  • Four differential LVDS outputs
  • Selectable crystal oscillator interface or LVCMOS/LVTTL single-ended input
  • Supports the following output frequencies: 212.5MHz, 187.5MHz, 159.375MHz, 106.25MHz and 53.125MHz
  • VCO range: 560MHz - 680MHz
  • RMS phase jitter at 212.5MHz (637kHz – 10MHz), using a 26.5625MHz crystal: <1ps (typical)
  • Full 3.3V or 2.5V output supply modes
  • 0°C to 70°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
844004AK-104LF Obsolete NLG32P1 VFQFPN 32 C Yes Tray
Availability
844004AK-104LFT Obsolete NLG32P1 VFQFPN 32 C Yes Reel
Availability

Technical Documentation

Title Other Languages Type Format File Size Date
Datasheets & Errata
844004-104 Datasheet Datasheet PDF 386 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-844 Termination - AC Coupling Clock Receivers Application Note PDF 82 KB
AN-842 Thermal Considerations in Package Design and Selection Application Note PDF 403 KB
AN-835 Differential Input with VCMR being VIH Referenced Application Note PDF 77 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-839 RMS Phase Jitter Application Note PDF 149 KB
AN-838 Peak-to-Peak Jitter Calculations Application Note PDF 32 KB
AN-834 Hot-Swap Recommendations Application Note PDF 67 KB
AN-837 Overdriving the Crystal Interface Application Note PDF 50 KB
AN-836 Differential Input to Accept Single-ended Levels Application Note PDF 37 KB
AN-832 Timing Budget and Accuracy Application Note PDF 48 KB
AN-830 Quartz Crystal Drive Level Application Note PDF 59 KB
AN-827 Application Relevance of Clock Jitter Application Note PDF 1.06 MB
AN-815 Understanding Jitter Units Application Note PDF 476 KB
AN-802 Crystal-Measuring Oscillator Negative Resistance Application Note PDF 52 KB
AN-805 Recommended Ferrite Beads Application Note PDF 38 KB
AN-801 Crystal-High Drive Level Application Note PDF 109 KB
AN-806 Power Supply Noise Rejection Application Note PDF 353 KB
PCNs & PDNs
PDN# : CQ-16-04 QUARTER MARKET DECLINED PDN Product Discontinuation Notice PDF 560 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
Other
Timing Solutions Products Overview Overview PDF 4.11 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