FemtoClock™ Crystal-to-LVCMOS/LVTTL Frequency Generator

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

Generator and a member of the family of high performance devices from ICS. The 840051I can synthesize 10 Gigabit Ethernet, SONET, or Serial ATA reference clock frequencies with the appropriate choice of crystal and output divider. The 840051I has excellent phase jitter performance and is packaged in a small 8-pin TSSOP, making it ideal for use in systems with limited board space.

Features

  • 1 LVCMOS/LVTTL output, 15Ω output impedance
  • Crystal oscillator interface designed for 18pF parallel resonant crystals
  • Output frequency range: 70MHz - 170MHz
  • VCO range: 560MHz - 680MHz
  • RMS phase jitter at 155.52MHz (1.875MHz - 20MHz): 0.48ps (typical)
  • RMS phase noise at 155.52MHz
    Offset                  Noise Power
    100Hz ................... -99.7 dBc/Hz
    1KHz .................... -120 dBc/Hz
    10KHz .................. -128 dBc/Hz
    100KHz ................ -127 dBc/Hz
  • 3.3V or 2.5V operating supply
  • -40°C to 85°C ambient operating temperature
  • Lead-Free fully RoHS compliant

Product Options

Orderable Part ID Part Status Pkg. Code Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
840051AGILF Obsolete PGG8 TSSOP 8 I Yes Tube Availability

Technical Documentation

Title Other Languages Type Format File Size Date
Datasheets & Errata
ICS840051I Datasheet Datasheet PDF 164 KB May 19, 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-845 Termination - LVCMOS Application Note PDF 62 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-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-16-01 PRODUCT DISCONTINUANCE NOTICE Product Discontinuation Notice PDF 552 KB May 3, 2016
PCN# : A1602-01(R1) Add Greatek Taiwan as Alternate Assembly Product Change Notice PDF 611 KB Apr 13, 2016
PCN# : A1602-01 Add Greatek Taiwan as Alternate Assembly Product Change Notice PDF 611 KB Feb 14, 2016
PCN# : A1511-01(R1) Add SPEL India as Alternate Assembly Location Product Change Notice PDF 596 KB Jan 27, 2016
PCN# : A1511-01 Add SPEL India as Alternate Assembly Location Product Change Notice PDF 544 KB Nov 12, 2015

Software & Tools

Title Other Languages Type Format File Size Date
840051I IBIS Model Model - IBIS ZIP 71 KB Nov 2, 2009