UJA1079ATW/5V0/WDJ

Specialized Overview

The UJA1079ATW/5V0/WDJ is a LIN core System Basis Chip (SBC) from NXP Semiconductors, designed to replace discrete components in Electronic Control Units. It integrates a LIN transceiver compliant with LIN 2.2A and SAE J2602 standards, a scalable 5 V voltage regulator delivering up to 250 mA for microcontroller supply, and an advanced independent watchdog with Window and Timeout modes. 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 temperature range of -40 °C to +125 °C and is housed in a 32-lead HTSSOP package.

Specialized Feature Summary

• Integrates a LIN transceiver compliant with LIN 2.2A, SAE J2602, and downward compatible with earlier LIN versions.
• Includes a scalable 5 V voltage regulator capable of delivering up to 250 mA, extendable via external PNP transistor.
• Features an advanced independent watchdog supporting Window and Timeout modes with on-chip oscillator.
• Provides enhanced EMC performance and robust ESD protection on bus and wake-up pins.

Specialized Applications

• Electronic Control Unit (ECU) power management
• LIN network sub-bus applications
• Sensor peripheral control systems

Specialized Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to ensure correct configuration. Confirm that the component meets RoHS compliance and dark green requirements. Check for any specific automotive qualification standards required by the application design. Ensure the package type matches the intended PCB layout constraints.

Specialized Selection Notes

Select this variant when a 5 V regulator output is required for the microcontroller and peripheral circuitry. Choose the version with the 'W' suffix if an integrated watchdog timer is necessary for system safety. Consider the external PNP transistor option if higher current capability or improved thermal dissipation distribution across the PCB is needed for the specific application load.

Specialized Part Context

This component belongs to the UJA1079A family of LIN core System Basis Chips. It serves as a dedicated solution for integrating common ECU functions into a single package, replacing multiple discrete components. The family includes variants with different regulator voltages (3.3 V or 5 V) and optional watchdog features, tailored for various automotive networking requirements.

Specialized Replacement Considerations

Consult the official datasheet for direct pin-compatible alternatives within the UJA1079A series. Verify functional equivalence regarding regulator voltage, watchdog presence, and package dimensions before substitution.