UJA1075ATW/5V0WD,1

Specialized Overview

The UJA1075ATW/5V0WD,1 is a high-speed CAN/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, and a LIN transceiver compliant with LIN 2.2A and SAE J2602. The device includes a scalable 5 V main voltage regulator (V1) delivering up to 250 mA for microcontroller supply, extendable via an external PNP transistor. A separate 5 V voltage regulator (V2) powers the on-board CAN transceiver independently. An advanced independent watchdog with Window and Timeout modes is integrated. Communication with the host microcontroller is managed through a full-duplex Serial Peripheral Interface (SPI). The component operates within a battery voltage range of 4.5 V to 28 V and is housed in a 32-lead HTSSOP package.

Specialized Feature Summary

• Integrates high-speed CAN and LIN transceivers with enhanced EMC performance and low slope mode capabilities.
• Features a scalable 5 V main voltage regulator capable of delivering up to 250 mA, with options for external current extension.
• Includes an advanced independent watchdog supporting Window and Timeout modes with programmable periods.
• Provides multiple wake-up sources including CAN, LIN, and local wake-up pins with source detection.

Specialized Applications

• Electronic Control Units (ECU) requiring integrated power management and communication interfaces
• Automotive sensor peripheral control networks
• Power distribution units utilizing CAN as the main network interface

Specialized Procurement Notes

Verify the specific ordering suffix against the manufacturer's datasheet to confirm the presence of the watchdog feature and the exact output voltage of the main regulator. Ensure the package type matches the required thermal and pinout specifications for the target PCB design. Cross-reference the revision level of the product data sheet to confirm compliance with the latest automotive standards.

Specialized Selection Notes

Select this variant when a 5 V output is required for the microcontroller supply instead of the 3.3 V option. Confirm that the application requires the integrated watchdog functionality indicated by the 'W' suffix. Evaluate the thermal dissipation requirements; if the load exceeds the internal regulator capacity, plan for an external PNP transistor connection to distribute heat effectively across the PCB.

Specialized Part Context

This component belongs to the UJA1075A family of System Basis Chips designed specifically for automotive electronic control units. It consolidates discrete components typically found in ECUs into a single package, reducing board space and improving system reliability. The family offers variations in output voltage and feature sets to accommodate different microcontroller and peripheral requirements.

Specialized Replacement Considerations

Direct replacements include other variants within the UJA1075A family, such as the UJA1075ATW/3V0WD,1, which provides a 3.3 V regulator instead of 5 V. Verify compatibility regarding the main regulator voltage and the presence of the watchdog timer before substituting.