High-Speed CMOS QuickSwitch 24:12 Mux/Demux

The QS33X257 is a high-speed CMOS TTL-compatible 24:12 multiplexer/ demultiplexer. The QS33X257 is functionally compatible to three of the QuickSwitch version of the 74F257, 74FCT257, and the 74ALS/AS/ LS257 Quad 2:1 multiplexers. The low ON resistance of the QS33X257 allows inputs to be connected to outputs without adding propagation delay and without generating additional ground bounce noise. The QS33X257 operates at -40C to +85C.

Features

  • Enhanced N channel FET with no inherent diode to Vcc
  • Bidirectional signal flow
  • 24:12 Mux/Demux switches connect inputs to outputs
  • Individual controls for each bank
  • Zero propagation delay, zero ground bounce
  • Undershoot clamp diodes on all switch and control inputs
  • TTL-compatible control inputs
  • Available in 48-pin QVSOP package

Product Options

Orderable Part ID Part Status Pkg. Code Pkg. Type Lead Count (#) Temp. Grade Pb (Lead) Free Carrier Type Buy Sample
QS33X257Q1G Active DJG48 QVSOP 48 I Yes Tube Availability
QS33X257Q1G8 Active DJG48 QVSOP 48 I Yes Reel Availability

Technical Documentation

Title Other Languages Type Format File Size Date
Datasheets & Errata
QS33X257 Datasheet Datasheet PDF 219 KB Aug 12, 2012
Application Notes & White Papers
AN-11: 5V and 3V Conversion with Zero Delay Application Note PDF 346 KB Feb 5, 2014
AN-19: Space Reduction Via Placement Application Note PDF 41 KB May 31, 1996
AN-17: Peripheral Isolation in Notebook Computers Application Note PDF 68 KB May 31, 1996
AN-13: Converting TTL to Hot Plug Application Note PDF 85 KB May 31, 1996
AN-09: CMOS Bus Switches Provide 0 Delay Application Note PDF 121 KB May 31, 1996
AN-20: Board Assembly for 0.4mm Pin Surface Mounts Application Note PDF 62 KB May 31, 1996
Quickswitch Basics Application Note PDF 83 KB Jul 5, 2005
TN-07: Analysis of QuickSwitch Behavior Application Note PDF 102 KB May 31, 1996
PCNs & PDNs
PCN#A-0504-02R1: Assembly Transfer IDT-Manila to OSE-Ph Product Change Notice PDF 16 KB Jul 21, 2005
PCN# A-0504-02R2: Assembly Transfer IDT-Manila to OSE-Ph Product Change Notice PDF 38 KB Aug 3, 2005
PCN#: A-0504-02, Transfer assembly facility IDT-Manila to OSE-Ph Product Change Notice PDF 47 KB Apr 28, 2005
PCN#: A-0410-02, Change IDT marking logo with new IDT gridless w Product Change Notice PDF 24 KB Nov 13, 2012
PCN# A-0508-02: OSET Alternate Assembly Location for Green Product Change Notice PDF 18 KB Sep 1, 2005
PCN# G0005-01, Laser Top Mark Product Change Notice PDF 24 KB May 9, 2000
PCN# G0106-01, Moisture Sensitive Label Change Product Change Notice PDF 274 KB Jun 10, 2001
PCN#:A-0312-02, new die attach material - 8290 Product Change Notice PDF 116 KB Dec 2, 2003
PCN#:A-0312-01, new mold compound material - G600 Product Change Notice PDF 109 KB Dec 2, 2003
PCN Addendum # L0203-10R1 Fab 2 to Fab 4 Transfer Product Change Notice PDF 110 KB Jan 12, 2003
PCN# L0203-10 Fab Transfer from Fab 2 to Fab 4 Product Change Notice PDF 27 KB Apr 14, 2002
PCN#: TB-0504-01, Transfer Test & Backend from IDT-Manila to IDT Product Change Notice PDF 35 KB Apr 28, 2005
PCN# : A-0605-04 UNISEM-Malaysia as Alternate Assembly Facility for QVSOP Packages Product Change Notice PDF 102 KB May 23, 2006

Software & Tools

Title Other Languages Type Format File Size Date
QS33X257 IBIS Model Model - IBIS ZIP 4 KB Jan 2, 2001
QS33X257 Hspice Model Model - HSPICE ZIP 6 KB Jan 2, 2001