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1-Bit Bi-Directional Level Shifter with Automatic Sensing

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Product Description

The PI4ULS5V201 is a 1-bit configurable dual supply bidirectional auto sensing translator that does not require a directional control pin. The A and B ports are designed to track two different power supply rails, VCCA and VCCB respectively. Both the VCCA and VCCB supply rails are configurable from 1.2 V to 5.5 V. This allows voltage logic signals on the VCCA side to be translated into lower, higher or equal value voltage logic signals on the VCCB side, and vice-versa.

The translator has integrated 10 kΩ pull-up resistors on the I/O lines. The integrated pull-up resistors are used to pull-up the I/O lines to either VCCA or VCCB. The PI4ULS5V201 is an excellent match for open-drain applications such as the I2C communication bus.


  • VCCA can be Less than, Greater than or Equal to VCCB
  • 1.2V to 5.5V on A Port and 1.2V to 5.5V on B Port
  • High-Speed with 20 Mb/s Guaranteed Data Rate for Push-pull application
  • High-Speed with 2 Mb/s Guaranteed Data Rate for Open-drain application
  • No Direction-Control Signal Needed
  • Low Bit-to-Bit Skew
  • Non-preferential Power-up Sequencing
  • ESD protection exceeds 8KV HBM per JESD22- A114
  • Integrated 10 kΩ Pull-up Resistors
  • Package: UDFN1.2x1.6-8L and SOT23-6L


  • I2C, SMBus, MDIO
  • Low Voltage ASIC Level Translation
  • Mobile Phones, PDAs, Camera

Product Specifications

Product Parameters

Compliance (Only Automotive supports PPAP) Standard
Translation From (V) 1.2 to 5.5
Translation To (V) 1.2 to 5.5
Max Signal Rate 2Mbps -Open Drain, 20Mbps -Push Pull
Bits Needed 1
Auto Direction Sensing? Yes
Shift Bi-Directional
Prop Delay N/A
Ambient or Junction Temperature (°C) -40 to 85

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
PI4ULS5V201TAEX Active SOT26 TPGP 3000 T&R


Authorized Distributor Quantity Inventory Date Countries/Regions Buy Online
Digi-Key Electronics 29140 12/5/2022 Europe, Asia, North America Buy Now
Mouser Electronics Inc. 5603 12/5/2022 South America, North America, Asia, Europe, Middle East Buy Now
Request Sample
PI4ULS5V201XVE Obsolete U-DFN1616-8 TPGP 100 TUBE
PI4ULS5V201XVEX Active U-DFN1616-8 TPGP 3000 T&R Contact Sales Request Sample

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)