FemtoClock® Crystal-to-LVDS 8-Output Clock Synthesizer

The 814S208I is an eight LVDS output clock synthesizer designed for wireless infrastructure applications. The device generates eight copies of a selectable 122.88MHz or 153.6MHz clock signal with excellent phase jitter performance. The PLL is optimized for a reference frequency of 30.72MHz. Both a crystal interface and a differential system clock input are supported for the reference frequency. An extra LVDS output duplicates the reference frequency and is provided for clock tree cascading. The device uses IDT's third generation FemtoClock® technology for an optimum of high clock frequency and low phase noise performance, combined with a low power consumption. A PLL lock status output is provided for monitoring and diagnosis purpose. The device supports a 3.3V voltage supply and is packaged in a small, lead-free (RoHS 6) 48-lead VFQFN package. The extended temperature range supports wireless infrastructure, telecommunication and networking end equipment requirements.

Features

  • Third generation FemtoClock® technology
  • Selectable 122.88MHz or 153.6MHz output clock synthesized from a 30.72MHz fundamental mode crystal
  • Eight differential LVDS clock outputs
  • Differential reference clock input pair
  • PLL lock indicator output
  • Crystal interface designed for a 30.72MHz, parallel resonant crystal
  • RMS phase jitter @ 122.88MHz, using a 30.72MHz crystal (12kHz - 20MHz): 0.650ps (typical)
  • RMS phase jitter @ 153.6MHz, using a 30.72MHz crystal (12kHz - 20MHz): 0.642ps (typical)
  • LVCMOS interface levels for the control input
  • Full 3.3V supply voltage
  • Available in Lead-free (RoHS 6) 48-lead VFQFN package
  • -40°C to 85°C ambient operating temperature

Product Options

Orderable Part ID Part Status Pkg. Code Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
814S208BKILF Active NLG48P1 VFQFPN 48 I Yes Tray Availability
814S208BKILFT Active NLG48P1 VFQFPN 48 I Yes Reel Availability

Technical Documentation

Title Other Languages Type Format File Size Date
Datasheets & Errata
814S208I Final Datasheet Datasheet PDF 1.40 MB Apr 7, 2016
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-846 Termination - LVDS Application Note PDF 50 KB May 12, 2014
AN-844 Termination - AC Coupling Clock Receivers Application Note PDF 82 KB May 12, 2014
AN-842 Thermal Considerations in Package Design and Selection Application Note PDF 403 KB May 11, 2014
AN-835 Differential Input with VCMR being VIH Referenced Application Note PDF 77 KB May 10, 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-833 Differential Input Self Oscillation Prevention Application Note PDF 94 KB May 5, 2014
AN-837 Overdriving the Crystal Interface Application Note PDF 50 KB May 5, 2014
AN-836 Differential Input to Accept Single-ended Levels Application Note PDF 37 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
PCN# : A1611-02 Add JCET China as Alternate Assembly and Change of Material Set at Alternate Assembly Location Product Change Notice PDF 583 KB Dec 19, 2016
PCN# : A1403-03 Gold wire to Copper wire Product Change Notice PDF 42 KB Oct 14, 2014
PCN# : TB1110-01 NEW SHIPPING TRAY ON 7 MM X 7 MM VFQFN-48 AND 7 MM X 7 MM VFQFN-56 Product Change Notice PDF 4.95 MB Nov 14, 2011
Other
The IDT Communications Products Advantage Overview PDF 4.00 MB Mar 21, 2018
IDT Clock Generation Overview 日本語 Overview PDF 1.83 MB Apr 28, 2016
IDT Clock Distribution Overview 日本語 Overview PDF 3.79 MB Apr 24, 2016

Software & Tools

Title Other Languages Type Format File Size Date
ICS814S208 IBIS Model Model - IBIS ZIP 66 KB Jun 28, 2011