FemtoClock® Crystal-to-HCSL Clock Generator

The 841664I is an optimized sRIO clock generator and a member of the family of high-performance clock solutions from IDT. The device uses a 25MHz parallel crystal to generate 125MHz and 156.25MHz clock signals, replacing solution requiring multiple oscillator and fanout buffer solutions. The device has excellent phase jitter (

Features

  • Four differential HCSL clock outputs: configurable for sRIO (125MHz or 156.25MHz) clock signals One REF_OUT LVCMOS/LVTTL clock output
  • Selectable crystal oscillator interface, 25MHz, 18pF parallel resonant crystal or LVCMOS/LVTTL single-ended reference clock input or LVCMOS/LVTTL single-ended input
  • Supports the following output frequencies: 125MHz or 156.25MHz
  • VCO: 625MHz
  • Supports PLL bypass and output enable functions
  • RMS phase jitter, using a 25MHz crystal (1.875MHz - 20MHz): 0.45ps (typical) @ 125MHz
  • Full 3.3V power supply mode
  • -40°C to 85°C ambient operating temperature
  • Available in lead-free (RoHS 6) package

Product Options

Orderable Part ID Part Status Pkg. Code Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
841664AGILF Last Time Buy DQG28 TSSOP 28 I Yes Tube Availability
841664AGILFT Last Time Buy DQG28 TSSOP 28 I Yes Reel Availability

Technical Documentation

Title Other Languages Type Format File Size Date
Datasheets & Errata
ICS841664I Datasheet Datasheet PDF 382 KB Jul 16, 2013
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-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-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
PDN# : CQ-18-03 Product Discontinuance Notice Product Discontinuation Notice PDF 218 KB Apr 26, 2018
PCN# : A1503-02R1 Assembly Location Transfer from ATP to OSET Product Change Notice PDF 33 KB Sep 30, 2015
PCN# : A1503-02 Transfer Assembly Location Product Change Notice PDF 31 KB Apr 19, 2015
PCN# : A1309-01 Changed of Traceability Mark Format Product Change Notice PDF 439 KB Oct 10, 2013
Other
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
841664I IBIS Model Model - IBIS ZIP 26 KB Jan 7, 2010