3.3V CMOS Buffer/Clock Driver

The FCT3805 is a 3.3 volt, non-inverting clock driver built using advanced dual metal CMOS technology. The device consists of two banks of drivers, each with a 1:5 fanout and its own output enable control. The device has a "heartbeat" monitor for diagnostics and PLL driving. The MON output is identical to all other outputs and complies with the output specifications in this document. The FCT3805 offers low capacitance inputs with hysteresis. The FCT3805 is designed for high speed clock distribution where signal quality and skew are critical. The FCT3805 also allows single point-topoint transmission line driving in applications such as address distribution, where one signal must be distributed to multiple recievers with low skew and high signal quality. For more information on using the FCT3805 with two different input frequencies on bank A and B, please see AN-236.

Features

  • 0.5 MICRON CMOS Technology
  • Guaranteed low skew < 500ps (max.)
  • Very low duty cycle distortion < 1.0ns (max.)
  • Very low CMOS power levels
  • TTL compatible inputs and outputs
  • Inputs can be driven from 3.3V or 5V components
  • Two independent output banks with 3-state control
  • 1:5 fanout per bank
  • "Heartbeat" monitor output
  • VCC = 3.3V ± 0.3V
  • Available in SSOP, SOIC, and QSOP packages

Product Options

Orderable Part ID Part Status Pkg. Code Pkg. Type Lead Count (#) Pkg. Dimensions Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
49FCT3805APYG8 Active PYG20 SSOP 20 7.2 x 5.3 x 1.73 C Yes Reel Availability
49FCT3805APYGI8 Active PYG20 SSOP 20 7.2 x 5.3 x 1.73 I Yes Reel Availability
49FCT3805AQG8 Active PCG20 QSOP 20 8.7 x 3.8 x 1.47 C Yes Reel Availability
49FCT3805AQGI8 Active PCG20 QSOP 20 8.7 x 3.8 x 1.47 I Yes Reel Availability
49FCT3805ASOG8 Active PSG20 SOIC 20 12.8 x 7.6 x 2.34 C Yes Reel Availability
49FCT3805ASOGI8 Active PSG20 SOIC 20 12.8 x 7.6 x 2.34 I Yes Reel Availability
49FCT3805PYG Active PYG20 SSOP 20 7.2 x 5.3 x 1.73 C Yes Tube Availability
49FCT3805PYG8 Active PYG20 SSOP 20 7.2 x 5.3 x 1.73 C Yes Reel Availability
49FCT3805PYGI Active PYG20 SSOP 20 7.2 x 5.3 x 1.73 I Yes Tube Availability
49FCT3805PYGI8 Active PYG20 SSOP 20 7.2 x 5.3 x 1.73 I Yes Reel Availability
49FCT3805QG Active PCG20 QSOP 20 8.7 x 3.8 x 1.47 C Yes Tube Availability
49FCT3805QG8 Active PCG20 QSOP 20 8.7 x 3.8 x 1.47 C Yes Reel Availability
49FCT3805QGI Active PCG20 QSOP 20 8.7 x 3.8 x 1.47 I Yes Tube Availability
49FCT3805QGI8 Active PCG20 QSOP 20 8.7 x 3.8 x 1.47 I Yes Reel Availability
49FCT3805SOG Active PSG20 SOIC 20 12.8 x 7.6 x 2.34 C Yes Tube Availability
49FCT3805SOG8 Active PSG20 SOIC 20 12.8 x 7.6 x 2.34 C Yes Reel Availability
49FCT3805SOGI Active PSG20 SOIC 20 12.8 x 7.6 x 2.34 I Yes Tube Availability
49FCT3805SOGI8 Active PSG20 SOIC 20 12.8 x 7.6 x 2.34 I Yes Reel Availability

Technical Documentation

Title Other Languages Type Format File Size Date
Datasheets & Errata
49FCT3805 Datasheet Datasheet PDF 70 KB May 16, 2010
Application Notes & White Papers
AN-828 Termination - LVPECL Application Note PDF 229 KB Jul 5, 2016
AN-815 Understanding Jitter Units Application Note PDF 476 KB Apr 23, 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-840 Jitter Specifications for Timing Signals Application Note PDF 349 KB May 7, 2014
AN-834 Hot-Swap Recommendations Application Note PDF 67 KB May 5, 2014
AN-827 Application Relevance of Clock Jitter Application Note PDF 1.06 MB Apr 23, 2014
AN-805 Recommended Ferrite Beads Application Note PDF 38 KB Jan 14, 2014
AN-150 Clock and Signal Distribution Application Note PDF 74 KB Oct 25, 2013
IDT Clock Buffers Offers Ultra Low Additive Phase Jitter Application Note PDF 1 KB Oct 19, 2008
AN-154: Estimating Power Dissipation in CMOS Application Note PDF 30 KB May 31, 1996
AN-82 Clock Distribution with Guaranteed Skew Application Note PDF 146 KB May 31, 1996
PCNs & PDNs
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# : TB1503-01R1 Carrier Tape Standardization for Selective Packages Product Change Notice PDF 333 KB Oct 21, 2015
PCN# : TB1503-01 Carrier Tape Standardization for Selective Packages Product Change Notice PDF 291 KB Jul 20, 2015
PCN# : A1208-01R1 Gold to Copper Wire Product Change Notice PDF 254 KB Dec 20, 2012
PCN# G-0203-05 Mold Compound Product Change Notice PDF 40 KB Apr 15, 2002
PCN#A-0504-02R1: Assembly Transfer IDT-Manila to OSE-Ph Product Change Notice PDF 16 KB Jul 21, 2005
PCN# A-0607-06 MMT Thailand as Alternate Assembly Facility for PLCC, SOIC 150mil/300mil Product Change Notice PDF 223 KB Oct 5, 2006
PCN# A-0504-02R2: Assembly Transfer IDT-Manila to OSE-Ph Product Change Notice PDF 38 KB Aug 3, 2005
PCN#: A-0504-02, Transfer assembly facility IDT-Manila to OSE-Ph Product Change Notice PDF 47 KB Apr 28, 2005
PCN#: A-0412-04 - To comply with Pb-free labels - Green Products Product Change Notice PDF 80 KB Dec 13, 2004
PCN#: A-0410-02, Change IDT marking logo with new IDT gridless w Product Change Notice PDF 24 KB Nov 13, 2012
PCN# A-0508-02: OSET Alternate Assembly Location for Green Product Change Notice PDF 18 KB Sep 1, 2005
PCN# G0106-01, Moisture Sensitive Label Change Product Change Notice PDF 274 KB Jun 10, 2001
PCN# G0005-01, Laser Top Mark Product Change Notice PDF 24 KB May 9, 2000
PCN#:A-0401-01, new m/c G600 & 8290 d/a material Product Change Notice PDF 196 KB Jan 18, 2004
PCN#:A-0312-02, new die attach material - 8290 Product Change Notice PDF 116 KB Dec 2, 2003
PCN#:A-0312-01, new mold compound material - G600 Product Change Notice PDF 109 KB Dec 2, 2003
PCN#: A-0310-01, Green Products Product Change Notice PDF 26 KB Oct 9, 2003
PCN # A-0406-07Rev.1, Qualify OSE-Taiwan for SSOP & TSSOP Product Change Notice PDF 21 KB Oct 21, 2004
PCN Addendum # L0203-10R1 Fab 2 to Fab 4 Transfer Product Change Notice PDF 110 KB Jan 12, 2003
PCN# L0203-10 Fab Transfer from Fab 2 to Fab 4 Product Change Notice PDF 27 KB Apr 14, 2002
PCN#: TB-0504-01, Transfer Test & Backend from IDT-Manila to IDT Product Change Notice PDF 35 KB Apr 28, 2005
PCN# G9911-05, To qualify low alpha mold compound. Product Change Notice PDF 44 KB Nov 17, 1999
PCN# G0202-01, Alternate assembly facility Product Change Notice PDF 16 KB Feb 7, 2002
PCN# : A-0605-05 AIT as Alternate Assembly Facility for SOIC/QSOP/SSOP/TSSOP/PDIP Product Change Notice PDF 298 KB May 24, 2006
PCN # L0203-09R2 Addendum Fab Transfer from Fab 2 to Fab 4 Product Change Notice PDF 101 KB Aug 15, 2004
PCN# L0203-09R1 Tech Upgrade & Fab Transfer Product Change Notice PDF 98 KB May 28, 2003
PCN# : TB0808-04 QTY PER TUBE CHANGE FOR SSOP-20 Product Change Notice PDF 55 KB Oct 12, 2008
PCN # L-0505-04 Die Revision Change from PB to Y Product Change Notice PDF 165 KB Jun 6, 2005
Other
The IDT Consumer Products Advantage Overview PDF 4.01 MB Jun 30, 2017
The IDT Automotive Advantage Overview PDF 3.55 MB May 26, 2017
The IDT Communications Products Advantage Overview PDF 2.54 MB Feb 13, 2017
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
49FCT3805 Hspice Model Model - HSPICE ZIP 11 KB Jan 2, 2001
49FCT3805 IBIS Model Model - IBIS ZIP 9 KB Oct 25, 2004

News & Additional Resources