FemtoClock™ Crystal-to-LVPECL/LVDS/LVCMOS Clock Generator

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

The 843S2807 provides five banks of outputs and a reference clock. The banks can be enabled by using a common output enable pin. A 25MHz crystal is used to generate the 50MHz, 66.67MHz, 87.5MHz, 100MHz, 125MHz, 133MHz and 350MHz frequencies.

Features

  • 5 banks of outputs:
    One single-ended LVCMOS reference clock output at: 25MHz
    Bank A: one single-ended (QA0) LVCMOS output at: 133MHz and one (QA1/nQA1) LVPECL output at: 66.67MHz, 100MHz and 125MHz
    Bank B: one (QB) LVCMOS output at: 50MHz
    Bank C: one (QC/nQC) differential LVPECL output at: 87.5MHz
    Bank D: one (QD/nQD) differential LVDS output at: 350MHz
  • Crystal input frequency: 25MHz
  • ±5% frequency margining
  • Full 3.3V operating supply
  • 0°C to 70°C ambient operating temperature(refer to Table 7 on page 11)
  • Available in lead-free (RoHS 6) package
  • For replacement part use 8T49N282B-dddNLGI

Product Options

Orderable Part ID Part Status Pkg. Code Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
843S2807DYLF Obsolete PRG32 TQFP 32 C Yes Tray Availability
843S2807DYLFT Obsolete PRG32 TQFP 32 C Yes Reel Availability

Technical Documentation

Title Other Languages Type Format File Size Date
Application Notes & White Papers
AN-828 Termination - LVPECL Application Note PDF 229 KB Jul 5, 2016
AN-831 The Crystal Load curve Application Note PDF 308 KB Sep 22, 2014
AN-842 Thermal Considerations in Package Design and Selection Application Note PDF 403 KB May 11, 2014
AN-803 Crystal Timing Budget and Accuracy for IDT Timing Clock Products Application Note PDF 44 KB May 7, 2014
AN-840 Jitter Specifications for Timing Signals Application Note PDF 349 KB May 7, 2014
AN-839 RMS Phase Jitter Application Note PDF 149 KB May 6, 2014
AN-838 Peak-to-Peak Jitter Calculations Application Note PDF 32 KB May 6, 2014
AN-834 Hot-Swap Recommendations Application Note PDF 67 KB May 5, 2014
AN-837 Overdriving the Crystal Interface Application Note PDF 50 KB May 5, 2014
AN-832 Timing Budget and Accuracy Application Note PDF 48 KB May 5, 2014
AN-830 Quartz Crystal Drive Level Application Note PDF 59 KB May 4, 2014
AN-827 Application Relevance of Clock Jitter Application Note PDF 1.06 MB Apr 23, 2014
AN-815 Understanding Jitter Units Application Note PDF 476 KB Apr 23, 2014
AN-802 Crystal-Measuring Oscillator Negative Resistance Application Note PDF 52 KB Mar 11, 2014
AN-805 Recommended Ferrite Beads Application Note PDF 38 KB Jan 14, 2014
AN-801 Crystal-High Drive Level Application Note PDF 109 KB Jan 14, 2014
AN-806 Power Supply Noise Rejection Application Note PDF 353 KB Jan 14, 2014
PCNs & PDNs
PDN# CQ-14-05 MARKET DECLINED PRODUCT DISCONTINUANCE NOTICE Product Discontinuation Notice PDF 192 KB Sep 3, 2014
PCN# : A1401-02 Alternate Copper Wire Assembly Site Product Change Notice PDF 36 KB Feb 15, 2014
PCN#: A1309-03 Additional Assembly Sources Product Change Notice PDF 398 KB Oct 20, 2013
PCN# : TB1303-01 Change of Carrier Tape for TQFP-32, TQFP-48 Product Change Notice PDF 472 KB Mar 30, 2013