UJA1075ATW/3V3WD,1

Specialized Overview

The UJA1075ATW/3V3WD,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 supporting LIN 2.0 through 2.2A standards. The device includes an advanced independent watchdog, a scalable 3.3 V voltage regulator delivering up to 250 mA for microcontroller supply, and a separate 5 V regulator for the CAN transceiver. It features a full-duplex SPI interface, two local wake-up ports, and a limp home output. The component operates within a battery voltage range of 4.5 V to 28 V and functions reliably between -40 °C and +150 °C.

Specialized Feature Summary

• Integrates high-speed CAN and LIN transceivers with enhanced EMC performance and robust ESD protection on bus pins.
• Provides scalable power management with a dedicated 3.3 V main regulator and a separate 5 V regulator for the CAN transceiver.
• Includes an advanced independent watchdog with window and timeout modes, configurable via SPI for system safety.
• Supports multiple low-power operating modes including Standby and Sleep, with wake-up capability via CAN, LIN, or local pins.

Specialized Applications

• Electronic Control Units (ECU) in automotive applications
• Power and sensor peripheral control networks
• Microcontroller-based systems requiring integrated CAN/LIN communication and power regulation

Specialized Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to ensure correct voltage regulator configuration and feature set. Confirm package type and compliance status such as RoHS before procurement. Check for any product lifecycle changes or obsolescence notices directly from NXP Semiconductors to avoid sourcing discontinued variants.

Specialized Selection Notes

Select this variant when a 3.3 V output is required for the microcontroller supply. Ensure the application utilizes the integrated watchdog function by confirming the 'W' suffix inclusion. Verify that the HTSSOP32 package dimensions fit the PCB layout constraints. Consider the external PNP transistor option if higher current distribution or thermal management beyond the internal regulator limits is needed.

Specialized Part Context

This component belongs to the UJA1075A family of System Basis Chips designed for automotive ECUs. It replaces discrete components by combining CAN/LIN interfaces with power management and safety features. The UJA1075A series offers variations in voltage regulators and watchdog configurations to suit different microcontroller requirements and system architectures.

Specialized Replacement Considerations

Direct substitutes include other UJA1075A variants with matching voltage outputs and watchdog features, such as UJA1075ATW/5V0WD,1 for 5 V regulator needs. Cross-family replacements like the UJA1076A may be considered but require verification of pin compatibility and feature alignment.