Diodes Incorporated
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3.3V Quad 2:1 Multiplexer/Demultiplexer

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Product Description

The PI3B3257 is a 3.3 Volt, Quad 2:1 multiplexer/demultiplexer with three-state outputs that is pinout and function compatible with the PI74FCT257T, 74F257, and 74ALS/AS/LS257. Inputs can be connected to outputs with low On-Resistance (5Ω) with no additional ground bounce noise or propagation delay.


  • Near-Zero propagation delay
  • 5Ω switches connect inputs to outputs
  • Fast Switching Speed: 4.8ns max.
  • Ultra-Low Quiescent Power: 0.1μA typical
    • Ideally suited for notebook applications
  • Pin compatible with 74 series 257 logic devices
  • Packaging (Pb-free & Green avaliable):
    • 16-pin 150 mil wide plastic QSOP (Q)
    • 16-pin 150 mil wide plastic SOIC (W)
    • 16-pin 173 mil wide plastic TSSOP (L)

Product Specifications

Product Parameters

Configuration Mux: Quad 2-Channel
Differential Channels N/A
HotInsertion 0
Lanes N/A
OtherFeatures N/A
RailToRail 0
Signal Type Single Ended
Single Ended Channels 2
Type N/A
Voltage 3.3

Technical Documents

Design tool model software

Recommended Soldering Techniques


Additional Technical Documents are available upon request: 
Application information, Evaluation board, and Other technical documents

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