UJA1076ATW/5V0/WDJ

Specialized Overview

The UJA1076ATW/5V0/WDJ is a high-speed CAN core System Basis Chip (SBC) from NXP Semiconductors, designed for automotive Electronic Control Units. 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 temperatures from -40 °C to +150 °C.

Specialized Feature Summary

• Integrates a high-speed CAN transceiver compatible with ISO 11898-2 and ISO 11898-5 standards alongside an advanced independent watchdog with window and timeout modes.
• Features a scalable 5 V main voltage regulator capable of delivering up to 250 mA, extendable via external PNP transistor for improved heat distribution.
• Includes a dedicated low dropout voltage regulator for the CAN transceiver to enhance EMC performance and ensure stable operation during cranking events.
• Provides comprehensive system control through a full-duplex SPI interface, bidirectional reset pin, interrupt outputs, and configurable sleep/standby modes.

Specialized Applications

• Automotive Electronic Control Units (ECU) requiring integrated power management and communication.
• Network applications controlling power and sensor peripherals using high-speed CAN as the main interface.
• Systems supporting remote flash programming via the CAN bus.

Specialized Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm regulatory compliance and package type. Ensure the component meets the required automotive standards and environmental specifications for the intended application environment before finalizing procurement decisions.

Specialized Selection Notes

Select this variant when a 5 V output is required for the microcontroller supply. Confirm that the integrated watchdog functionality is necessary for the system design. Verify compatibility with the target microcontroller's SPI interface and reset requirements. Ensure the HTSSOP32 package fits the available PCB space and thermal constraints.

Specialized Part Context

The UJA1076A series replaces discrete components in ECUs by combining a CAN transceiver, voltage regulators, and a watchdog into a single package. This integration reduces board space and improves system reliability. The UJA1076ATW/5V0/WDJ specifically denotes the version with a 5 V regulator and watchdog functionality housed in an HTSSOP32 package.

Specialized Replacement Considerations

Check for direct replacements within the UJA1076A family, such as the UJA1076ATW/3V3/WDJ, which offers a 3.3 V regulator instead of 5 V. Ensure any substitute maintains the same package type and functional compatibility with the existing system design.