The 33903/4/5 is the second generation family of System Basis Chips, which combines several features and enhances present module designs. The device works as an advanced power management unit for the MCU, additional integrated circuits such as sensors, and CAN transceivers. It has a built-in enhanced high speed CAN interface (ISO11898-2 and -5), with local and bus failure diagnostics, protection, and fail safe operation mode. The SBC may include one or two LIN 2.1 interfaces with LIN output pin switches. It includes up to four wake-up input pins than can also be configured as output drivers for flexibility. This device implements multiple Low Power modes, with very lowcurrent consumption. In addition, the device is part of a family concept where pin compatibility, among the various devices with and without LIN interfaces, add versatility to module design. The 33903/4/5 also implements an innovative and advanced fail-safe state machine and concept solution.