The UJA1061 fail-safe System Basis Chip (SBC) replaces basic discrete components that are common in every Electronic Control Unit (ECU) with a Controller Area Network (CAN) and a Local Interconnect Network (LIN) interface. The fail-safe SBC supports all networking applications that control various power and sensor peripherals by using fault-tolerant CAN as the main network interface and LIN as a local sub-bus. The fail-safe SBC contains the following integrated devices:
* ISO11898-3 compliant fault-tolerant CAN transceiver, interoperable with TJA1054,TJA1054A and TJA1055
* LIN transceiver compliant with LIN 2.0 and SAE J2602, and compatible with LIN 1.3
* Advanced independent watchdog
* Dedicated voltage regulators for microcontroller and CAN transceiver
* Serial peripheral interface (full duplex)
* Local wake-up input port
* Inhibit/limp-home output port
In addition to the advantages of integrating these common ECU functions in a single package, the fail-safe SBC offers an intelligent combination of system-specific functions such as:
* Advanced low-power concept
* Safe and controlled system start-up behavior
* Advanced fail-safe system behavior that prevents any conceivable deadlock
* Detailed status reporting on system and subsystem levels
The UJA1061 is designed to be used in combination with a microcontroller that incorporates a CAN controller. The fail-safe SBC ensures that the microcontroller is always started up in a defined manner. In failure situations, the fail-safe SBC will maintain microcontroller functionality for as long as possible to provide full monitoring and a software-driven fall-back operation. The UJA1061 is designed for 14 V single power supply architectures and for 14 V and 42 V dual power supply architectures.
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## Features
**2.1 General**
* Contains a full set of CAN and LIN ECU functions:
* CAN transceiver and LIN transceiver
* Voltage regulator for the microcontroller (3.3 V or 5.0 V)
* Separate voltage regulator for the CAN transceiver (5 V)
* Enhanced window watchdog with on-chip oscillator
* Serial Peripheral Interface (SPI) for the microcontroller
