Diodes Incorporated
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SOTiny Single SPDT Mux/DeMux Switch

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The PI5A3157 is a high-bandwidth, fast single-pole double-throw (SPDT) CMOS switch. It can be used as an analog switch or as a low-delay bus switch. Specified over a wide operating power supply voltage range, 1.65V to 5.5V, the PI5A3157 has a maximum ON resistance of 12Ω at 1.65V, 9Ω at 2.3V & 6Ω at 4.5V.

Break-before-make switching prevents both switches being enabled simultaneously. This eliminates signal disruption during switching. The control input, S, tolerates input drive signals up to 5.5V, independent of supply voltage.

The PI5A3157 is an improved direct replacement for the NC7SB3157.


  • CMOS Technology for Bus and Analog Applications
  • Low On-Resistance: 8Ω at 3.0V
  • Wide VDD Range: 1.65V to 5.5V
  • Rail-to-Rail Signal Range
  • Control Input Overvoltage Tolerance: 5.5V min.
  • Fast Transition Speed: 5.2ns max. at 5V
  • High Off Isolation: 57dB at 10MHz
  • 54dB (10MHz) Crosstalk Rejection Reduces Signal Distortion
  • Break-Before-Make Switching
  • High Bandwidth: 250 MHz
  • Extended Industrial Temperature Range: –40°C to 85°C
  • Improved Direct Replacement for NC7SB3157
  • Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2)
  • Halogen and Antimony Free. “Green” Device (Note 3)
  • For automotive applications requiring specific change control (i.e. parts qualified to AEC-Q100/101/104/200, PPAP capable, and manufactured in IATF 16949 certified facilities), please contact us or your local Diodes representative. https://www.diodes.com/quality/product-definitions/
  • Packaging (Pb-free & Green available):
    • 6-pin SC70 (C)


  • Cell Phones
  • PDAs
  • Portable Instrumentation
  • Battery Powered Communications
  • Computer Peripherals

Product Specifications

Product Parameters

Compliance(Only Automotive supports PPAP) Standard
Configuration 1-Channel SPDT
Differential Channels N/A
HotInsertion 1
Lanes N/A
OtherFeatures None
Rail-to-Rail 0
Signal Type Single Ended
Single Ended Channels 1
Type None
Voltage 5

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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