48-V CAN transceiver testing

The automotive industry is heading to 48-V power supply. Therefore, CAN transceiver needs to be tested accordingly.

The benefits are: reducing I²R losses, improving power density, enhancing voltage regulation, size reduction, etc. Most important is the ECU (electronic control unit) size reduction by more than 20 percent.

This has also an impact on PMA-sublayer implementations, e.g., CAN transceiver and system base chips (SBC), which need to be resistant against 48-V short circuits, GND (ground) loss, and cross-talking. In order to test such components, a test plan specification is required.

Therefore, CiA is going to establish the IG04 (lower layers) SIG07 (48-V transceiver testing) technical group. The kick-off meeting will take place in Hamburg (Germany) on January 19 and 20, 2026. Registration is obligatory (by 2026-01-07). The meeting will start at 11:00 a.m. Meeting details will be given after registration.