Diodes Menu Close
Back to Analog Switches


UDFN 1mmx1mm, Single SPDT Mux/DeMux Switch

NOTE: Datasheet may not yet reflect updated package obsolescence/phase out status or Package Drawing. Please refer to the PRODUCT OPTIONS 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.
Contact Sales

Log in or register to manage email notifications about changes to datasheets or PCNs for this part.

Product Description

The PI5A3157B 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 PI5A3157B has a maximum ON resistance of 12-ohms at 1.65V, 9-ohms at 2.3V & 6- ohms at 4.5V.

Break-before-make switching prevents both switches being enabled simultaneously. This eliminates signal disruption during switching. The control input, S, is independent of supply voltage. PI5A3157B is an improved direct replacement for the NC7SB3157.


  • CMOS Technology for Bus and Analog Applications
  • Low On-Resistance: 8Ω at 3.0V
  • Wide VCC Range: 1.65V to 5.5V
  • Rail-to-Rail Signal Range
  • Control Input Overvoltage Tolerance: 5.5V
  • Fast Transition Speed: 2ns at 5.0V
  • High Off Isolation: -63dB @ 10MHz
  • Break-Before-Make Switching
  • High Bandwidth: 350MHz
  • Extended Industrial Temperature Range: -40°C to 85°C
  • PI5A3157B Is Improved Direct Replacement for NC7SB3157
  • Packaging (Pb-free & Green):
    • -6-pin UDFN 1mm×1mm
    • -6-pin SC70


  • Cell Phones
  • PDAs
  • MP3 Players
  • 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 0
Lanes N/A
OtherFeatures N/A
RailToRail 0
Signal Type Single Ended
Single Ended Channels 1
Voltage 5

Technical Documents

Recommended Soldering Techniques


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

Request Documents
Orderable Part Number Status Package Environmental Compliance Packing Buy from Distributor /
Contact Sales
Request Samples
Qty. Carrier
PI5A3157BC6EX Active SOT363 GREEN 3000 T&R Contact Sales Request Sample
PI5A3157BZUEX Not Recommended for New Design (NRND) U-DFN1010-6 TPGP 3000 T&R Contact Sales

Environmental Compliance Legend:
LFF: Pb-Free Finish and RoHS 5/6
TLFP: Totally Pb-Free Product and RoHS 6/6
LFGP: Pb-free Finish and Green Product, RoHS 5/6 and Halogen Free
TPGP: Totally Pb-Free and Green Product, RoHS 6/6 and Halogen Free
GREEN: Halogen-free and RoHS compliant
RoHS: RoHS compliant but NOT halogen-free

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)