General description
The UJA1066 fail-safe System Basis Chip (SBC) replaces basic discrete components which are common in every Electronic Control Unit (ECU) with a Controller Area Network (CAN) interface. The fail-safe SBC supports all networking applications that control various power and sensor peripherals by using high-speed CAN as the main network interface. The fail-safe SBC contains the following integrated devices:

• High-speed CAN transceiver, interoperable and downward compatible with CAN transceiver TJA1041 and TJA1041A, and compatible with the ISO 11898-2 standard and the ISO 11898-5 standard (in preparation)
• 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

FEATUREs and benefits
General
■ Contains a full set of CAN ECU functions:
    ◆ CAN 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
    ◆ ECU power management system
    ◆ Fully integrated autonomous fail-safe system
■ Designed for automotive applications:
    ◆ Supports 14 V and 42 V architectures
    ◆ Excellent ElectroMagnetic Compatibility (EMC) performance
    ◆ ±8 kV ElectroStatic Discharge (ESD) protection Human Body Model (HBM) for off-board pins
    ◆ ±4 kV ElectroStatic Discharge (ESD) protection IEC 61000-4-2 for off-board pins
    ◆ ±60 V short-circuit proof CAN-bus pins
    ◆ Battery and CAN-bus pins are protected against transients in accordance with ISO 7637-3
    ◆ Very low sleep current
■ Supports remote flash programming via the CAN-bus
■ Small 8 mm × 11 mm HTSSOP32 package with low thermal resistance
(Continue ...)