FemtoClock NG Dual Universal Frequency Translator

 

The IDT8T49N244I is a dual PLL using FemtoClock® NG technology. It integrates low phase noise Frequency Translation / Synthesis and Jitter attenuation. It includes alarm and monitoring functions suitable for networking and communications applications. The device has two fully independent PLLs. Each PLL is able to generate any output frequency in the 0.98MHz - 312.5MHz range and most output frequencies in the 312.5MHz - 1,300MHz range (see Table 3 for details). A wide range of input reference clocks may be used as the source for the output frequencies.

Each PLL has three operating modes to support a very broad spectrum of applications: Frequency Synthesizer, High-Bandwidth Frequency Translator and Low-Bandwidth Frequency Translator.

Features

  • Fourth generation FemtoClock® NG technology
  • Two fully independent PLLs
  • Outputs are programmable as LVPECL or LVDS
  • Programmable output frequency: 0.98MHz up to 1,300MHz
  • Two differential inputs support the following input levels: LVPECL, LVDS, LVHSTL, HCSL
  • Input frequency range: 8kHz - 710MHz 
  • Input clock monitor and alarm
  • Smoothed reference switch
  • I2C Serial interface for register programming
  • RMS phase jitter: 486fs (typical), Low Bandwidth Mode (FracN)
  • RMS phase jitter: 326fs (typical), Synthesizer Mode (Integer FB)
  • Full 2.5V ± 5% supply mode
  • -40°C to 85°C ambient operating temperature
  • 10mm X 10mm CABGA lead-free (RoHS 6) package
  • Additional family members include Tri-PLL (8T49N366I) and Quad PLL (8T49N445I and 8T49N488I) devices

Product Options

Orderable Part ID Part Status Pkg. Code Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
8T49N244A-000ASGI Not Recommended for New Designs ASG80 CABGA 80 I Yes Tray Availability
8T49N244A-000ASGI8 Not Recommended for New Designs ASG80 CABGA 80 I Yes Reel Availability
8T49N244A-999ASGI Not Recommended for New Designs ASG80 CABGA 80 I Yes Tray Availability
8T49N244A-999ASGI8 Not Recommended for New Designs ASG80 CABGA 80 I Yes Reel Availability

Technical Documentation

Title Other Languages Type Format File Size Date
Datasheets & Errata
IDT8T49N244I Data Sheet Datasheet PDF 555 KB Mar 11, 2014
User Guides & Manuals
FemtoNG Universal Frequency Translator Ordering Product Information Guide Manual - User Reference PDF 447 KB Jan 15, 2017
Application Notes & White Papers
AN-828 Termination - LVPECL Application Note PDF 229 KB Jul 5, 2016
AN-835 Differential Input with VCMR being VIH Referenced Application Note PDF 77 KB May 10, 2014
AN-815 Understanding Jitter Units Application Note PDF 476 KB Apr 23, 2014
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-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-836 Differential Input to Accept Single-ended Levels Application Note PDF 37 KB May 5, 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-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-802 Crystal-Measuring Oscillator Negative Resistance Application Note PDF 52 KB Mar 11, 2014
AN-827 Application Relevance of Clock Jitter Application Note PDF 1.06 MB Apr 23, 2014
AN-806 Power Supply Noise Rejection Application Note PDF 353 KB Jan 14, 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
PCNs & PDNs
PCN# : W1308-01 Change of Passivation Thickness Product Change Notice PDF 941 KB Sep 10, 2013