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QS33X257 - Block Diagram

QS33X257

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 Specification

FunctionPkg. CodeTemp. RangeBus Width (bits)Core Voltage (V)Output TypeOn Resistance (Ω)Speed Grade
24:12 Mux/DemuxDJG48-40 to 85°C2455Standard

Product Options

Orderable Part IDPart StatusPkg. CodePkg. TypeLead Count (#)Temp. GradePb (Lead) FreeCarrier TypeSample & Buy
QS33X257Q1GActiveDJG48QVSOP48IYesTubeCheck Availability
QS33X257Q1G8ActiveDJG48QVSOP48IYesReelCheck Availability

Documents

Technical Documentation

Title Type Format File Size Datesort icon
Datasheets & Errata
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QS33X257 Datasheet Datasheet PDF 219 KB Aug 13, 2012
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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TN-07: Analysis of QuickSwitch Behavior Application Note PDF 102 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
PCNs & PDNs
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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-0605-04 UNISEM-Malaysia as Alternate Assembly Facility for QVSOP Packages Product Change Notice PDF 102 KB May 24, 2006
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PCN# A-0508-02: OSET Alternate Assembly Location for Green Product Change Notice PDF 18 KB Sep 2, 2005
show all (13)
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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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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 Addendum # L0203-10R1 Fab 2 to Fab 4 Transfer Product Change Notice PDF 110 KB Jan 13, 2003
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PCN# L0203-10 Fab Transfer from Fab 2 to Fab 4 Product Change Notice PDF 27 KB Apr 15, 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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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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QS33X257 Hspice Model Model - HSPICE ZIP 6 KB Jan 3, 2001
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QS33X257 IBIS Model Model - IBIS ZIP 4 KB Jan 3, 2001