Diodes Incorporated
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3.3V 8-Bit Bus Switch (FCT245 Pinout)

NOTE: Datasheet may not yet reflect updated package obsolescence/phase out status or Package Drawing. Please refer to the BUY NOW tab for the most up to date package options and drawings. Please refer to PCN/PDN tabs for most current package obsolescence/phase out status.
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Product Description

The PI3B3245 is a 3.3V 8-bit, 2-port bus switch designed with a low On-Resistance (5-ohm) allowing inputs to be connected directly to outputs. The bus switch creates no additional propagational delay or additional ground bounce noise. The switches are turned ON by the Bus Enable (BE) input signal.


  • Near-Zero propagation delay
  • 5-ohm switches connect inputs to outputs
  • Fast Switching Speed: 4.5ns (max.)
  • Ultra-Low Quiescent Power (0.2μA Typical)
    • Ideally suited for notebook applications
  • TTL-compatible control of inputs levels
  • ESD protection (2kV Human Body Model and 200V Machine Model)
  • Packaging (Pb-free & Green):
    • 20-pin QSOP (Q)
    • 20-pin TSSOP (L)
    • 20-pin SOIC (S)

Product Specifications

Product Parameters

Configuration 8-Channel, 1:1
Differential Channels N/A
HotInsertion 0
Lanes N/A
OtherFeatures N/A
RailToRail 0
Signal Type Single Ended
Single Ended Channels 8
Type N/A
Voltage 3.3

Technical Documents

Recommended Soldering Techniques


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

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Product Change Notices (PCNs)

A PCN may only apply to specific orderable part numbers in this datasheet. Please refer to the corresponding PCN to see the exact orderable part number(s) affected.

PCN # Issue Date Implementation Date Subject
PCN-2481 2020-08-26 2021-02-26 Device End of Life (EOL)
PCN-2428 2019-11-12 2020-02-12 Assembly & Test Site Porting from OSE to Greatek