MB3U-I2C is a PC USB adapter intended to enable a simple evaluation of iC-Haus’ integrated circuits using the corresponding evaluation board and GUI software. The adapter provides differential, galvanically isolated RS422 master interfaces for BiSS and SSI via its 9-pin D-sub connector as well as single-ended master interface for SPI, I2C and 2-wire via its 2x5-pin connector. The adapter is compatible to USB 2.0. Drivers for Windows 10 and Linux are provided.