The ICS840N051I is a LVCMOS/LVTTL clock synthesizer designed for SDH/SONET and Ethernet applications. The device generates a selectable 156.25MHz or 77.76MHz clock signal with excellent phase jitter performance. The device uses IDT’s fourth generation FemtoClock® NG technology for an optimum of high clock frequency, low phase noise performance and low power consumption.The device supports 2.5V or 3.3V voltage supply and is packaged in a small, lead-free (RoHS 6) 8-lead TSSOP package. The extended temperature range supports wireless infrastructure, telecommunication and networking end equipment requirements.

Features

 

  • Fourth generation FemtoClock® NG technology 
  • 155.52MHz output clock synthesized from a 19.44MHz fundamental mode crystal 
  • One 2.5V or 3.3V LVCMOS/LVTTL clock output
  • Crystal interface designed for a 12pF parallel resonant crystal
  • RMS phase jitter @ 155.52MHz, using a 19.44MHz crystal (12kHz - 20MHz): 0.482ps (maximum) 
  • RMS phase jitter @ 156.25MHz, using a 19.53125MHz crystal (1.875MHz - 20MHz): 0.138ps (maximum) 
  • LVCMOS interface levels for the control inputs
  • Full 2.5V or 3.3V supply voltage
  • Lead-free (RoHS 6) packaging 
  • -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
840N051BGILF Active PGG8 TSSOP 8 I Yes Tube
Availability
840N051BGILFT Active PGG8 TSSOP 8 I Yes Reel
Availability

Technical Documentation

Title Other Languages Type Format File Size Date
Datasheets & Errata
ICS840N051I Data Sheet Datasheet PDF 245 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-845 Termination - LVCMOS Application Note PDF 62 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-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-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
PCN# : A1602-01(R1) Add Greatek Taiwan as Alternate Assembly Product Change Notice PDF 611 KB
PCN# : A1602-01 Add Greatek Taiwan as Alternate Assembly Product Change Notice PDF 611 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
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