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 Options

Orderable Part ID Part Status Pkg. Code Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
QS3244PAG Active PGG20 TSSOP 20 C Yes Tube
Availability
QS3244PAG8 Active PGG20 TSSOP 20 C Yes Reel
Availability
QS3244QG Active PCG20 QSOP 20 C Yes Tube
Availability
QS3244QG8 Active PCG20 QSOP 20 C Yes Reel
Availability
QS3244SOG Active PSG20 SOIC 20 C Yes Tube
Availability
QS3244SOG8 Active PSG20 SOIC 20 C Yes Reel
Availability

Technical Documentation

Title Other Languages Type Format File Size Date
Datasheets & Errata
QS3244 Datasheet Datasheet PDF 212 KB
Application Notes & White Papers
AN-11: 5V and 3V Conversion with Zero Delay Application Note PDF 346 KB
Quickswitch Basics Application Note PDF 83 KB
TN-07: Analysis of QuickSwitch Behavior Application Note PDF 102 KB
AN-13: Converting TTL to Hot Plug Application Note PDF 85 KB
AN-09: CMOS Bus Switches Provide 0 Delay Application Note PDF 121 KB
AN-19: Space Reduction Via Placement Application Note PDF 41 KB
AN-20: Board Assembly for 0.4mm Pin Surface Mounts Application Note PDF 62 KB
AN-17: Peripheral Isolation in Notebook Computers Application Note PDF 68 KB
PCNs & PDNs
PCN# : A1808-01 Transfer Assembly Location from Amkor Philippines for select pacakges Product Change Notice PDF 39 KB
PCN# : A1602-01(R1) Add Greatek Taiwan as Alternate Assembly Product Change Notice PDF 611 KB
PCN# : A1602-01 Add Greatek Taiwan as Alternate Assembly Product Change Notice PDF 611 KB
PCN# : A1511-01(R1) Add SPEL India as Alternate Assembly Location Product Change Notice PDF 596 KB
PCN# : A1511-01 Add SPEL India as Alternate Assembly Location Product Change Notice PDF 544 KB
PCN# : TB1503-01R1 Carrier Tape Standardization for Selective Packages Product Change Notice PDF 333 KB
PCN# : TB1503-01 Carrier Tape Standardization for Selective Packages Product Change Notice PDF 291 KB
PCN#: A-0410-02, Change IDT marking logo with new IDT gridless w Product Change Notice PDF 24 KB
PCN# A-0508-02: OSET Alternate Assembly Location for Green Product Change Notice PDF 18 KB
PCN# A-0504-02R2: Assembly Transfer IDT-Manila to OSE-Ph Product Change Notice PDF 38 KB
PCN#A-0504-02R1: Assembly Transfer IDT-Manila to OSE-Ph Product Change Notice PDF 16 KB
PCN#: TB-0504-01, Transfer Test & Backend from IDT-Manila to IDT Product Change Notice PDF 35 KB
PCN#: A-0504-02, Transfer assembly facility IDT-Manila to OSE-Ph Product Change Notice PDF 47 KB
PDN# L-05-04 Selective Logic Products Obsolescence Product Discontinuation Notice PDF 173 KB
PCN#: A-0501-01, New m/c DMC-2000 and d/a 8390A for PDIP pkgs Product Change Notice PDF 42 KB
PCN#:A-0401-01, new m/c G600 & 8290 d/a material Product Change Notice PDF 196 KB
PCN#:A-0312-02, new die attach material - 8290 Product Change Notice PDF 116 KB
PCN#:A-0312-01, new mold compound material - G600 Product Change Notice PDF 109 KB
PCN# L0212-01 Fab Site Change to Fab 4 Product Change Notice PDF 50 KB
PCN# G-0203-05 Mold Compound Product Change Notice PDF 40 KB
PCN# G0202-01, Alternate assembly facility Product Change Notice PDF 16 KB
PCN# G0106-01, Moisture Sensitive Label Change Product Change Notice PDF 274 KB
PDN# Logic-00-09: Obsolete PDIP Package Product Discontinuation Notice PDF 73 KB
PCN# G0005-01, Laser Top Mark Product Change Notice PDF 24 KB

Software & Tools

Title Other Languages Type Format File Size Date
QS3244 IBIS Model Model - IBIS ZIP 8 KB
QS3244 Hspice Model Model - HSPICE ZIP 5 KB