UJA1078ATW/5/2Z

Overview

The UJA1078ATW/5/2Z is a high-speed CAN and dual LIN core System Basis Chip (SBC) from NXP Semiconductors. It integrates a high-speed CAN transceiver compliant with ISO 11898-2 and ISO 11898-5, alongside two LIN 2.1-compatible transceivers. The device includes a 250 mA voltage regulator for the microcontroller, an independent 5 V regulator for the CAN transceiver, and a serial peripheral interface (SPI). It features advanced low-power concepts, controlled system start-up, and detailed status reporting. Packaged in a compact HTSSOP32 format, it supports remote flash programming via CAN and offers robust ESD and transient protection for automotive electronic control units.

Feature Summary

• Integrates high-speed CAN and dual LIN interfaces to replace discrete components in electronic control units
• Provides independent voltage regulation for both the microcontroller and the CAN transceiver
• Includes an advanced watchdog timer with window and timeout modes for system reliability
• Offers enhanced electromagnetic compatibility and robust electrostatic discharge protection

Applications

• Automotive electronic control units requiring integrated power and sensor peripheral control
• Network applications utilizing high-speed CAN as the primary bus interface
• Systems employing LIN interfaces as local auxiliary buses for peripheral management

Procurement Notes

Verify the specific suffix configuration against the official NXP product database to ensure correct feature sets, such as watchdog availability or voltage regulator options. Confirm package type and reel specifications prior to ordering. Check for any discontinuation notices or lifecycle changes directly from the manufacturer. Ensure compatibility with existing PCB layouts and thermal requirements for the HTSSOP32 package.

Selection Notes

Select this component when a single-chip solution is required for CAN and dual LIN communication within an automotive ECU. It is suitable for designs needing integrated power management with a 250 mA output capability. Consider the independent regulators for improved EMC performance and noise isolation between the microcontroller and bus transceivers. Verify that the HTSSOP32 package dimensions fit the mechanical constraints of the target application.

Part Context

This part belongs to the UJA1078A series of core SBCs designed for automotive networking. It replaces traditional discrete components by combining transceivers, regulators, and control logic into one package. The series supports various configurations, including versions with advanced watchdog timers. It is engineered to work seamlessly with microcontrollers featuring CAN controllers, ensuring controlled start-up and efficient power distribution.

Replacement Considerations

Check for direct substitutes within the UJA1078 family, such as variants with different suffixes indicating specific feature combinations like watchdog inclusion. Verify pin-to-pin compatibility if replacing with other NXP SBCs. Consult official substitution guides for any functional differences in regulator outputs or interface capabilities.