3.3V CMOS Buffer/Clock Driver

The FCT3805B 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 FCT3805B offers low capacitance inputs with hysteresis. The FCT3805B is designed for high speed clock distribution where signal quality and skew are critical. The FCT3805B also allows single point-to-point 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 FCT3805B 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 (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
49FCT3805BPYG Active PYG20 SSOP 20 C Yes Tube Availability
49FCT3805BPYG8 Active PYG20 SSOP 20 C Yes Reel Availability
49FCT3805BPYGI Active PYG20 SSOP 20 I Yes Tube Availability
49FCT3805BPYGI8 Active PYG20 SSOP 20 I Yes Reel Availability
49FCT3805BQG Last Time Buy PCG20 QSOP 20 C Yes Tube Availability
49FCT3805BQG8 Last Time Buy PCG20 QSOP 20 C Yes Reel Availability
49FCT3805BQGI Last Time Buy PCG20 QSOP 20 I Yes Tube Availability
49FCT3805BQGI8 Last Time Buy PCG20 QSOP 20 I Yes Reel Availability
49FCT3805BSOG Last Time Buy PSG20 SOIC 20 C Yes Tube Availability
49FCT3805BSOG8 Last Time Buy PSG20 SOIC 20 C Yes Reel Availability
49FCT3805BSOGI Last Time Buy PSG20 SOIC 20 I Yes Tube Availability
49FCT3805BSOGI8 Last Time Buy PSG20 SOIC 20 I Yes Reel Availability

Technical Documentation

Title Other Languages Type Format File Size Date
Datasheets & Errata
49FCT3805B Datasheet Datasheet PDF 69 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
PCNs & PDNs
PDN# : CQ-17-04(R1) Product Discontinuance Notice Product Discontinuation Notice PDF 606 KB Nov 29, 2017
PDN# : CQ-17-04 Product Discontinuance Notice Product Discontinuation Notice PDF 599 KB Aug 24, 2017
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# : A1403-03 Gold wire to Copper wire Product Change Notice PDF 42 KB Oct 14, 2014
PCN# : A1208-01R1 Gold to Copper Wire Product Change Notice PDF 254 KB Dec 20, 2012
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-0508-02: OSET Alternate Assembly Location for Green Product Change Notice PDF 18 KB Sep 1, 2005
PCN# : A-0605-05 AIT as Alternate Assembly Facility for SOIC/QSOP/SSOP/TSSOP/PDIP Product Change Notice PDF 298 KB May 24, 2006
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
IDT Fanout Buffers Product Overview Product Brief PDF 739 KB Feb 16, 2015
High-Performance, Low-Phase Noise Clocks Buffers product brief Product Brief PDF 378 KB Aug 13, 2012

Software & Tools

Title Other Languages Type Format File Size Date
49FCT3805B IBIS Model Model - IBIS ZIP 9 KB May 31, 2006

News & Additional Resources