UJA1079ATW/3V3WD,1

Specialized Overview

The UJA1079ATW/3V3WD,1 is a LIN core System Basis Chip (SBC) from NXP Semiconductors designed for automotive Electronic Control Units (ECUs). It integrates a LIN transceiver compliant with LIN 2.2A and SAE J2602 standards, a scalable 3.3 V voltage regulator delivering up to 250 mA, 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 battery supply range down to 4.5 V and includes enhanced electromagnetic compatibility (EMC) performance with ±8 kV ESD protection on bus pins.

Specialized Feature Summary

• Integrates LIN transceiver, voltage regulator, and watchdog in a single package
• Supports advanced low-power concepts with safe system start-up behavior
• Provides detailed status reporting on system and sub-system levels via SPI
• Includes dedicated limp home output for activating application-specific hardware

Specialized Applications

• Automotive electronic control units (ECU)
• Power and sensor peripheral control networks
• Local Interconnect Network (LIN) sub-bus applications

Specialized Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm the presence of the watchdog feature and the exact voltage regulator output level. Ensure the component matches the required HTSSOP32 package dimensions and lead pitch specifications for your PCB layout.

Specialized Selection Notes

Select this variant when a 3.3 V microcontroller supply is required alongside LIN communication capabilities. Consider the external PNP transistor option if higher current distribution or thermal management beyond the integrated 250 mA limit is necessary for the target application design.

Specialized Part Context

This component belongs to the UJA1079A family of LIN core system basis chips. Variants within this family differ primarily by the voltage regulator output (3.3 V vs. 5 V) and the inclusion of the watchdog timer functionality indicated by the 'W' suffix in the part number.

Specialized Replacement Considerations

Consult the official datasheet for confirmed substitute part numbers within the same product family that match the required voltage and feature set.