UJA1076TW/5V0/WD:1

Specialized Overview

The UJA1076TW/5V0/WD:1 is a high-speed CAN core System Basis Chip (SBC) from NXP Semiconductors, designed for automotive Electronic Control Units (ECUs). It integrates a high-speed CAN transceiver compliant with ISO 11898-2 and ISO 11898-5 standards, an advanced independent watchdog, and two voltage regulators. The main regulator V1 provides a scalable 5 V output delivering up to 250 mA for the microcontroller, while a separate regulator V2 supplies the on-board CAN transceiver. The device features a full-duplex Serial Peripheral Interface (SPI), two local wake-up input ports, and a limp-home output port. It operates within a battery supply range of 4.5 V to 28 V and supports remote flash programming via the CAN bus.

Specialized Feature Summary

• Integrates a high-speed CAN transceiver compatible with TJA1042 and ISO 11898-2/ISO 11898-5 standards
• Includes an advanced independent watchdog with Window, Timeout, and Off modes supported by an on-chip oscillator
• Features a scalable 5 V voltage regulator capable of delivering up to 250 mA for microcontroller power
• Provides detailed status reporting and control via a 16-bit full-duplex Serial Peripheral Interface (SPI)

Specialized Applications

• Automotive Electronic Control Units (ECUs)
• Power and sensor peripheral networking applications
• Systems requiring remote flash programming via CAN bus

Specialized Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm regulatory compliance and package details. Ensure compatibility with the target microcontroller's SPI interface requirements. Confirm that the 5 V regulator version meets the system's power distribution needs before finalizing procurement.

Specialized Selection Notes

Select this component when a combined solution for high-speed CAN communication and ECU power management is required. The 5 V regulator version is suitable for systems needing a dedicated 5 V supply for the microcontroller. Consider the external PNP transistor option if improved heat distribution over the PCB is necessary for high-load scenarios.

Specialized Part Context

The UJA1076 series replaces discrete components in ECUs with a single integrated chip. The TW/5V0 variant specifically includes a 5 V main voltage regulator, while the WD suffix indicates the presence of an advanced independent watchdog. This SBC is designed to work with microcontrollers incorporating a CAN controller to ensure controlled system startup and reliable operation.

Specialized Replacement Considerations

The integrated CAN transceiver is inter-operable and downward compatible with the TJA1042. When replacing discrete components, verify that the replacement part supports the same ISO 11898-2 and ISO 11898-5 standards and offers similar power management capabilities.