UJA1079TW/5V0,118

Specialized Overview

The UJA1079TW/5V0,118 is a LIN core System Basis Chip (SBC) from NXP Semiconductors designed for automotive Electronic Control Units. It integrates a LIN transceiver compliant with LIN 2.1 and SAE J2602 standards, a scalable 5 V voltage regulator delivering up to 250 mA, and an advanced independent watchdog. The device features a full-duplex Serial Peripheral Interface (SPI), two local wake-up input ports, and a limp home output port. Packaged in a 32-lead HTSSOP plastic thermal enhanced thin shrink small outline package (SOT549-1), it supports low-power concepts and safe system start-up behavior.

Specialized Feature Summary

• Integrates a LIN transceiver compliant with LIN 2.1, LIN 2.0, and SAE J2602 standards, featuring low slope mode for optimized EMC performance.
• Includes a scalable 5 V voltage regulator capable of delivering up to 250 mA, extendable with an external PNP transistor for improved heat distribution.
• Provides an advanced independent watchdog supporting Window and Timeout modes with an on-chip oscillator clock source.
• Features a full-duplex 16-bit SPI interface for configuration, control, and diagnosis alongside detailed status reporting.

Specialized Applications

• Automotive Electronic Control Units (ECU) requiring integrated power management and communication.
• Networking applications controlling power and sensor peripherals via Local Interconnect Network (LIN).
• Systems requiring safe and controlled microcontroller start-up sequences.

Specialized Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm regulatory compliance and package type. Confirm availability status as inventory levels fluctuate. Ensure compatibility with existing PCB layouts regarding the HTSSOP32 package dimensions and exposed die pad requirements for thermal dissipation.

Specialized Selection Notes

Select the UJA1079TW/5V0 variant when a 5 V supply rail is required for the microcontroller and peripherals. Consider the WD version if an integrated watchdog timer is necessary. Evaluate the need for an external PNP transistor based on total load current and thermal dissipation constraints on the printed circuit board.

Specialized Part Context

This component belongs to the UJA1079 family of LIN core System Basis Chips. Variants within this family include versions with 3.3 V regulators and those equipped with watchdog timers. The UJA1079 serves as a centralized solution for ECU functions, replacing discrete components typically found in automotive networking architectures.

Specialized Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Verify pinout and functional compatibility before considering alternative devices from other manufacturers.