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Level Translating I2C Bus/SMBus Repeater

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Product Description

The PI6ULS5V9517A is a CMOS integrated circuit intended for I2C-bus or SMBus applications. It can provide level shifting between low voltage (down to 0.8 V) and higher voltage (2.2V to 5.5V) in mixed-mode applications. And it enables I2C and similar bus system to be extended, without degeradation of peformance even during level shifting.

The PI6ULS5V9517A enables the system designer to isolate two halves of a bus for both voltage and capacitance, accommodating more I2C devices or longer trace length. It also permits extension of the I2C-bus by providing bidirectional buffering for both the data (SDA) and the clock (SCL) lines, thus allowing two buses of 400 pF to be connected in an I2C application. 


  • 2 channel, bidirectional buffer
  • I2C-bus and SMBus compatible
  • Port A operating supply voltage range of 0.8 V to 5.5 V
  • Port B operating supply voltage range of 2.2 V to 5.5 V
  • Voltage level translation from 0.8 V to 5.5 V and from 2.2 V to 5.5 V
  • Active HIGH repeater enable input
  • Open-drain input/outputs
  • Lock-up free operation
  • Supports arbitration and clock stretching across the repeater
  • Accommodates Standard-mode and Fast-mode I2C-bus devices and multiple masters
  • Powered-off high-impedance I2C-bus pins
  • 5.5 V tolerant I2C-bus and enable pins
  • 0 Hz to 400 kHz clock frequency (the maximum system operating frequency may be less than 400 kHz because of the delays added by the repeater)
  • ESD protection exceeds 8KV HBM per JESD22- A114
  • Package: MSOP-8L, SOIC-8L and TDFN2x3-8L 

Product Specifications

Product Parameters

Translation From (V) 0.8 to 5.5
Translation To (V) 2.2 to 5.5
Max Signal Rate 400Khz
Bits Needed 2
Auto Direction Sensing? Yes
Shift Bi-Directional
Prop Delay N/A
Ambient or Junction Temperature (°C) -40 to 85
Compliance (Only Automotive supports PPAP) Standard

Technical Documents

Design tool model software

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
PI6ULS5V9517AUE Obsolete MSOP-8 LFGP 100 TUBE
PI6ULS5V9517AUEX Active MSOP-8 TPGP 2500 T&R


Authorized Distributor Quantity Inventory Date Countries/Regions Buy Online
Avnet Asia 7500 1/19/2022 Hong Kong Buy Now
Request Sample
PI6ULS5V9517AWE Obsolete SO-8 LFGP 100 TUBE
PI6ULS5V9517AWEX Not Recommended for New Design (NRND) SO-8 LFGP 2500 T&R


Authorized Distributor Quantity Inventory Date Countries/Regions Buy Online
Mouser Electronics Inc. 852 1/19/2022 South America, North America, Asia, Europe, Middle East Buy Now
PI6ULS5V9517AZEEX Not Recommended for New Design (NRND) W-DFN2030-8 TPGP 3000 T&R


Authorized Distributor Quantity Inventory Date Countries/Regions Buy Online
Digi-Key Electronics 23378 1/19/2022 Europe, Asia, North America Buy Now

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

PCN # Issue Date Implementation Date Subject
PCN-2539 2021-09-09 2022-03-09 Device End of Life (EOL)
PCN-2510 2021-02-26 2021-05-26 Qualified Additional A/T Sites, Fab Site and Data Sheet Change
PCN-2505 2021-01-26 2021-07-26 Device End of Life (EOL)
PCN-2448 2020-02-05 2020-08-05 Device End of Life (EOL)