A specialized AURIX™ TC39xXX MCU family with debugging, tracing, measuring, and calibrating capabilities The SAK-TC397XE-256F400S BD belongs to the TC39x Emulation Devices, . It has the same feature set as the TC39x standard family with additional debug and tracing capabilities. The TC39xXE offers support for calibration, rapid prototyping, instrumentation and debug/emulation.TC39xXE is based on TC39x.