I²C Isolators

I²C isolators deliver galvanic isolation for bidirectional communication over SDA and SCL lines, preventing ground loops, electrical noise, and faults in mixed-voltage setups. Clock stretching works fully on both lines, maintaining protocol compatibility.

They suit robotics with noisy motors isolating sensors, automation linking domains at different potentials, and embedded systems bridging logic levels safely.

Modules vary by isolated power output to supply the target side, plus options with or without connectors for direct wiring. One side handles 3 V to 5.5 V, the other 2.25 V to 5.5 V, ensuring reliable performance across common MCU and sensor voltages.

Unlike level shifters, full galvanic separation eliminates any direct electrical path.

Pololu I²C Isolator with Connectors, ISO1640

Code: SKU-010779

This module enables galvanically isolated bidirectional I²C communication between two devices. The bidirectionality applies to both SDA and SCL, which allows for clock stretching. Side 1 operates from 3 V to 5.5 V, and side 2 operates from 2.25 V to 5.5 V. More Details...

$ 6.95

Special Order

Shipping from $4.90

+337 more from our supplier in 7-10 days

Pololu I²C Isolator with Isolated Power and Connectors, ISO1640, MIE1W0505BGLVH, 5V/3.3V, 200mA

Code: SKU-010781

This module enables galvanically isolated bidirectional I²C communication between two devices while supplying regulated, isolated power to the target. The bidirectionality applies to both SDA and SCL, which allows for clock stretching. More Details...