UJA1078ATW/3/2Z

Overview

The UJA1078ATW/3/2Z is a high-speed CAN and dual LIN 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, alongside two LIN 2.1-compatible transceivers. The device features an advanced independent watchdog timer with window and timeout modes, a serial peripheral interface (SPI), and a 250 mA voltage regulator for microcontroller power supply. Packaged in a compact HTSSOP32 format, it supports low-power concepts and controlled system startup.

Feature Summary

• Integrates high-speed CAN transceiver and dual LIN transceivers within a single package to replace discrete ECU components
• Includes an advanced independent watchdog timer with window and timeout modes for system safety
• Provides a 250 mA voltage regulator for the microcontroller with optional external PNP transistor support for thermal distribution
• Features enhanced electromagnetic compatibility performance and robust electrostatic discharge protection on bus pins

Applications

• Automotive electronic control units requiring integrated CAN and LIN networking
• Power and sensor peripheral control systems using high-speed CAN as the main network interface
• Local auxiliary bus applications utilizing LIN interfaces for subsystem communication

Procurement Notes

Verify the specific ordering suffix matches the required voltage regulator output and packaging configuration. Confirm that the component meets RoHS and halogen-free requirements for your assembly process. Ensure the HTSSOP32 package dimensions align with your PCB footprint design. Check for any specific environmental or reliability certifications required by your automotive standard compliance protocols before finalizing procurement orders.

Selection Notes

Select this SBC when a unified solution for CAN and dual LIN communication is needed to reduce board space and component count. It is suitable for designs requiring a dedicated voltage regulator for the microcontroller with up to 250 mA current capability. Consider this part if enhanced EMC performance and robust ESD protection are critical for the application environment. Ensure the microcontroller interface supports SPI for configuration and status monitoring.

Part Context

This component belongs to the UJA series of System Basis Chips, which integrate essential functions like transceivers, regulators, and watchdogs into a single package. These chips are designed to simplify the design of electronic control units by replacing multiple discrete components. The UJA1078 variant specifically targets applications needing both high-speed CAN and dual LIN connectivity for comprehensive vehicle networking.

Replacement Considerations

Direct substitutes may include other variants within the UJA1078 family with different voltage regulator outputs or packaging options. Verify pin-to-pin compatibility and electrical specifications before swapping. Consult official NXP documentation for approved alternative part numbers that maintain functional equivalence.