The FS65 family of automotive system basis chips (SBCs) provides power management, communication interfaces, system control, and functional safety features for automotive electronic control units (ECUs). The FS65 integrates DC-DC switching regulators, linear regulators, CAN FD and LIN transceivers, and ultra-low-power modes to optimize energy consumption. Developed for ISO 26262 applications up to ASIL B and ASIL D, the FS65 includes voltage monitoring, fail-safe mechanisms, watchdog functionality, and diagnostic features to support safety-oriented system architectures. The device supports SPI communication for control and diagnostics and is qualified for operation up to 150 °C ambient temperature in AEC-Q100 Grade 0 applications.