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QS3244 - Block Diagram

QS3244

High-Speed CMOS QuickSwitch 8-Bit Bus Switch

The QS3244 provides a set of eight high-speed CMOS TTL-compatible bus switches in a pinout compatible with 74FCT244, 74F244, 74ALS/AS/ LS244 8-bit drivers. The low ON resistance (5 ohm) of the 3244 allows inputs to be connected to outputs without adding propagation delay and without generating additional ground bounce noise. The QS3244 operates at -40C to +85C.

Features

  • Enhanced N channel FET with no inherent diode to Vcc
  • 5 ohm bidirectional switches connect inputs to outputs
  • Zero propagation delay, zero ground bounce
  • Undershoot clamp diodes on all switch and control inputs
  • Hot-swapping, hot-docking
  • Voltage translation (5V to 3.3V)
  • Power conservation
  • Capacitance reduction and isolation
  • Clock gating
  • Bus switching and isolation
  • Available in 20 pin QSOP, SOIC, and TSSOP packages

Product Specification

FunctionPkg. CodeTemp. RangeBus Width (bits)Core Voltage (V)Output TypeOn Resistance (Ω)Speed Grade
244 SwitchPSG20, PCG20, PGG20-40 to 85°C855Standard

Product Options

Orderable Part IDPart StatusPkg. CodePkg. TypeLead Count (#)Temp. GradePb (Lead) FreeCarrier TypeSample & Buy
QS3244PAGActivePGG20TSSOP20IYesTubeCheck Availability
QS3244PAG8ActivePGG20TSSOP20IYesReelCheck Availability
QS3244QGActivePCG20QSOP20IYesTubeCheck Availability
QS3244QG8ActivePCG20QSOP20IYesReelCheck Availability
QS3244SOGActivePSG20SOIC20IYesTubeCheck Availability
QS3244SOG8ActivePSG20SOIC20IYesReelCheck Availability

Documents

Technical Documentation

Title Type Format File Size Datesort icon
Datasheets & Errata
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QS3244 Datasheet Datasheet PDF 212 KB Feb 14, 2011
Apps Notes & White Papers
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AN-11: 5V and 3V Conversion with Zero Delay Application Note PDF 346 KB Feb 5, 2014
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Quickswitch Basics Application Note PDF 83 KB Jul 6, 2005
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AN-19: Space Reduction Via Placement Application Note PDF 41 KB Jun 1, 1996
show all (8)
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AN-13: Converting TTL to Hot Plug Application Note PDF 85 KB Jun 1, 1996
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AN-09: CMOS Bus Switches Provide 0 Delay Application Note PDF 121 KB Jun 1, 1996
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AN-17: Peripheral Isolation in Notebook Computers Application Note PDF 68 KB Jun 1, 1996
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AN-20: Board Assembly for 0.4mm Pin Surface Mounts Application Note PDF 62 KB Jun 1, 1996
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TN-07: Analysis of QuickSwitch Behavior Application Note PDF 102 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# : A1511-01(R1) Add SPEL India as Alternate Assembly Location Product Change Notice PDF 596 KB Jan 28, 2016
show all (23)
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PCN# : A1511-01 Add SPEL India as Alternate Assembly Location Product Change Notice PDF 544 KB Nov 13, 2015
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PCN# : TB1503-01R1 Carrier Tape Standardization for Selective Packages Product Change Notice PDF 333 KB Oct 22, 2015
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PCN# : TB1503-01 Carrier Tape Standardization for Selective Packages Product Change Notice PDF 291 KB Jul 21, 2015
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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
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PCN# A-0508-02: OSET Alternate Assembly Location for Green Product Change Notice PDF 18 KB Sep 2, 2005
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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#: TB-0504-01, Transfer Test & Backend from IDT-Manila to IDT Product Change Notice PDF 35 KB Apr 29, 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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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-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-0312-01, new mold compound material - G600 Product Change Notice PDF 109 KB Dec 3, 2003
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PCN#:A-0312-02, new die attach material - 8290 Product Change Notice PDF 116 KB Dec 3, 2003
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PCN# L0212-01 Fab Site Change to Fab 4 Product Change Notice PDF 50 KB Dec 16, 2002
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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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QS3244 Hspice Model Model - HSPICE ZIP 5 KB Jan 23, 2003
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QS3244 IBIS Model Model - IBIS ZIP 8 KB Dec 8, 2003