The QS34X383 provides four sets of eight high-speed CMOS TTLcompatible bus switches. The low ON resistance (5 ohm) of the QS34X383 allows inputs to be connected to outputs without adding propagation delay and without generating additional ground bounce noise. The Bus exchange configuration allows byte swapping of buses in systems. It can also be used as a 16-bit 2-to-1 multiplexer and to create low delay barrel shifters, etc. The QS34X383 operates at -40C to +85C.


  • 5 ohm switches connect inputs to outputs
  • Zero propagation delay
  • Direct bus connect
  • Live insertion capability
  • Low power CMOS proprietary technology
  • Bus exchange allows nibble swap
  • TTL-compatible control inputs
  • Available in 80-pin Millipaq package

Product Options

Part Number Part Status Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
Active QVSOP 80 C Yes Tube
Active QVSOP 80 C Yes Reel

Documentation & Downloads

Title Other Languages Type Format File Size Date
Datasheets & Errata
QS34X383 Datasheet Datasheet PDF 302 KB
Application Notes & White Papers
AN-11: 5V and 3V Conversion with Zero Delay Application Note PDF 417 KB
Quickswitch Basics Application Note PDF 142 KB
AN-15: CMOS Cus Exchange Switches for Crossbars Application Note PDF 106 KB
AN-19: Space Reduction Via Placement Application Note PDF 41 KB
AN-09: CMOS Bus Switches Provide 0 Delay Application Note PDF 121 KB
AN-12: Using QuickSwitch to Make Dual Port RAMs Application Note PDF 58 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
AN-13: Converting TTL to Hot Plug Application Note PDF 85 KB
TN-07: Analysis of QuickSwitch Behavior Application Note PDF 102 KB
PCN# : A1908-02 Adding SPEL India and Greatek Taiwan as Qualified Assembly Facilities Product Change Notice PDF 157 KB
PCN# : A1301-01 Gold to Copper Wire Product Change Notice PDF 99 KB
PCN#: A-0410-02, Change IDT marking logo with new IDT gridless w Product Change Notice PDF 24 KB
PCN# : A-0605-04 UNISEM-Malaysia as Alternate Assembly Facility for QVSOP Packages Product Change Notice PDF 102 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#: A-0504-02, Transfer assembly facility IDT-Manila to OSE-Ph Product Change Notice PDF 47 KB
PCN#: TB-0504-01, Transfer Test & Backend from IDT-Manila to IDT Product Change Notice PDF 35 KB
PCN#:A-0312-01, new mold compound material - G600 Product Change Notice PDF 109 KB
PCN#:A-0312-02, new die attach material - 8290 Product Change Notice PDF 116 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
PCN# G0005-01, Laser Top Mark Product Change Notice PDF 24 KB
QS34X383 IBIS Model Model - IBIS ZIP 4 KB
QS34X383 Hspice Model Model - HSPICE ZIP 6 KB