Diodes Incorporated
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PI3A125B (Not Recommended for new design)

NRND = Not Recommended for New Design

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Product Description

The PI3A125B is a single-pole single throw (SPST) normally close (NC) CMOS switch. The switch is open when IN is HIGH. The high-precision device is ideal for low-distortion audio, video, signal switching and routing. Specified over a wide operating power supply voltage, 1.65V to 6.0V, the PI3A125B has on-resistance of 12- ohms at 1.65V, 9-ohms at 2.3V & 6-ohms at 4.5V. The control input, IN, is independent of supply voltage.


  • CMOS Technology for Bus and Analog Applications
  • Low On-Resistance: 8Ω at 3.0V
  • Wide VCC Range: 1.65V to 6.0V
  • Rail-to-Rail Signal Range
  • Control Input Overvoltage Tolerance: 6.0V
  • Fast Transition Speed: 2ns at 5.0V
  • High Off Isolation: -63dB @ 10MHz
  • Break-Before-Make Switching
  • I/O Pins have Power-off Protection Functions
  • Extended Industrial Temperature Range: -40°C to 85°C
  • Packaging (Pb-free & Green): -5-pin SC70 (C) -5-pin SOT23 (TA)


  • Audio, Video Switching, and Routing
  • Cell Phones
  • PDAs
  • Telecommunications
  • Portable Instrumentation
  • Battery powered Communication Systems
  • Computer Peripherals
  • Mechanical Relay Replacement

Product Specifications

Product Parameters

Configuration 1-Channel SPST
Differential Channels N/A
HotInsertion 0
Lanes N/A
OtherFeatures N/A
Rail-to-Rail 0
Signal Type Single Ended
Single Ended Channels 1
Voltage 5

Related Content


Technical Documents

Recommended Soldering Techniques


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-2519 2021-05-20 2021-11-20 Device End of Life (EOL)