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74FCT621T - Block Diagram

74FCT621T

Octal Bus Transceiver (Open-Drain)

The 74FCT621T is an octal transceiver with non-inverting Open- Drain bus compatible outputs in both send and receive directions. The B bus outputs are capable of sinking 64mA providing very good capacitive drive characteristics. The 74FCT621A is designed for asynchronous two-way communication between data buses. The 74FCT621A operates at -40C to +85C

Features

  • Std. and A speeds
  • Low input and output leakage ?1 uA (max.)
  • CMOS power levels
  • True TTL input and output compatibility: – VOH = 3.3V (typ.) – VOL = 0.3V (typ.)
  • Meets or exceeds JEDEC standard 18 specifications
  • Power off disable outputs permit “live insertion”
  • Available in 20 pin SOIC package

Product Specification

FunctionPkg. CodeTemp. RangeBus Width (bits)Core Voltage (V)Output TypeOn Resistance (Ω)Speed Grade
TransceiverPSG20-40 to 85°C85Standard, A

Product Options

Orderable Part IDPart StatusPkg. CodePkg. TypeLead Count (#)Temp. GradePb (Lead) FreeCarrier TypeSample & Buy
74FCT621ATSOGActivePSG20SOIC20IYesTubeCheck Availability
74FCT621ATSOG8ActivePSG20SOIC20IYesReelCheck Availability
74FCT621TSOGActivePSG20SOIC20IYesTubeCheck Availability
74FCT621TSOG8ActivePSG20SOIC20IYesReelCheck Availability

Documents

Technical Documentation

Title Type Format File Size Datesort icon
Datasheets & Errata
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74FCT621T Datasheet Datasheet PDF 142 KB Oct 22, 2014
Apps Notes & White Papers
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AN-152: FCT-T Octal Logic Characteristics... Application Note PDF 158 KB Jun 1, 1996
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AN-154: Estimating Power Dissipation in CMOS Application Note PDF 30 KB Jun 1, 1996
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AN-147: The Myth of Ground Bounce Measurements Application Note PDF 143 KB Jun 1, 1996
show all (4)
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AN-154: Estimating Power Dissipation in CMOS Application Note PDF 30 KB Jun 1, 1996
PCNs & PDNs
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PCN# : A1602-01(R1) Add Greatek Taiwan as Alternate Assembly Product Change Notice PDF 611 KB Apr 14, 2016
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PCN# : A1602-01 Add Greatek Taiwan as Alternate Assembly Product Change Notice PDF 611 KB Feb 15, 2016
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PCN#: A-0410-02, Change IDT marking logo with new IDT gridless w Product Change Notice PDF 24 KB Nov 14, 2012
show all (19)
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PCN# : L0808-01 Fab 2 to Fab 4 Transfer on IDT74FCT621 Product Change Notice PDF 85 KB Sep 18, 2008
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PCN# A-0504-02R2: Assembly Transfer IDT-Manila to OSE-Ph Product Change Notice PDF 38 KB Aug 4, 2005
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PCN#A-0504-02R1: Assembly Transfer IDT-Manila to OSE-Ph Product Change Notice PDF 16 KB Jul 22, 2005
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PCN#: A-0504-02, Transfer assembly facility IDT-Manila to OSE-Ph Product Change Notice PDF 47 KB Apr 29, 2005
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PCN#: TB-0504-01, Transfer Test & Backend from IDT-Manila to IDT Product Change Notice PDF 35 KB Apr 29, 2005
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PDN# L-05-04 Selective Logic Products Obsolescence Product Delete Notice PDF 177 KB Apr 26, 2005
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PCN#: A-0501-01, New m/c DMC-2000 and d/a 8390A for PDIP pkgs Product Change Notice PDF 42 KB Jan 25, 2005
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PCN#: A-0412-04 - To comply with Pb-free labels - Green Products Product Change Notice PDF 80 KB Dec 14, 2004
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PCN#:A-0401-01, new m/c G600 & 8290 d/a material Product Change Notice PDF 196 KB Jan 19, 2004
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PCN#: A-0310-01, Green Products Product Change Notice PDF 26 KB Oct 10, 2003
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PCN# L0203-09R1 Tech Upgrade & Fab Transfer Product Change Notice PDF 98 KB May 29, 2003
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PCN# G-0203-05 Mold Compound Product Change Notice PDF 40 KB Apr 16, 2002
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PCN# G0202-01, Alternate assembly facility Product Change Notice PDF 16 KB Feb 8, 2002
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PCN# G0106-01, Moisture Sensitive Label Change Product Change Notice PDF 274 KB Jun 11, 2001
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PDN# Logic-00-09: Obsolete PDIP Package Product Discontinuation Notice PDF 73 KB Apr 24, 2001
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PCN# G0005-01, Laser Top Mark Product Change Notice PDF 24 KB May 10, 2000

Software & Tools

Title Type Format File Size Datesort icon
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74FCT621T Hspice Model Model - HSPICE ZIP 18 KB Jan 3, 2001
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74FCT621T IBIS Model Model - IBIS ZIP 7 KB Mar 9, 1999