UJA1075TW/3V3,118

Specialized Overview

The UJA1075TW/3V3,118 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 2.1, LIN 2.0, and SAE J2602. The device includes a scalable 3.3 V voltage regulator delivering up to 250 mA for microcontroller supply, extendable via an external PNP transistor. A separate 5 V regulator powers the on-board CAN transceiver. Communication with the host microcontroller is facilitated through a full-duplex Serial Peripheral Interface (SPI). The chip supports advanced low-power concepts including Standby and Sleep modes, features a programmable watchdog with Window and Timeout modes, and provides two local wake-up input ports.

Specialized Feature Summary

• Integrates high-speed CAN and LIN transceivers with dedicated voltage regulators for independent power management
• Supports advanced low-power operation with configurable Standby and Sleep modes and multiple wake-up sources
• Includes a programmable watchdog with Window and Timeout modes for enhanced system safety
• Features robust electromagnetic compatibility (EMC) performance and protection against electrostatic discharge and bus short circuits

Specialized Applications

• Electronic Control Units (ECU) requiring integrated power management and communication interfaces
• Automotive networking applications utilizing high-speed CAN as the main network interface
• Local sub-bus systems employing LIN protocols for sensor and peripheral control
• Microcontroller-based automotive systems needing controlled start-up behavior and detailed status reporting

Specialized Procurement Notes

Verify the specific ordering suffix to confirm the voltage regulator output level and presence of the watchdog feature. The '3V3' designation indicates a 3.3 V main regulator, while 'WD' variants include the watchdog function. Confirm package type HTSSOP32 and RoHS compliance requirements match your manufacturing specifications before finalizing procurement orders.

Specialized Selection Notes

Select this component when designing ECUs that require both high-speed CAN and LIN connectivity within a single package. Choose the 3.3 V version if the target microcontroller operates at 3.3 V logic levels. Ensure the application benefits from the integrated power management features, such as the scalable 250 mA regulator and independent CAN transceiver supply, to simplify PCB layout and improve EMC performance compared to discrete solutions.

Specialized Part Context

The UJA1075 series serves as a core System Basis Chip designed to replace basic discrete components in Electronic Control Units. It is part of NXP's portfolio of automotive interface ICs, specifically tailored for applications demanding high integration of power regulation and bus communication. The device complements microcontrollers equipped with CAN controllers by ensuring safe and controlled system startup and providing comprehensive diagnostic capabilities.

Specialized Replacement Considerations

Direct replacements should be sought within the UJA1075 family, such as the UJA1075ATW/3V3/1J or UJA1075TW/5V0/WD, depending on the required regulator voltage and watchdog configuration. Verify pinout compatibility and register map alignment when substituting with other NXP SBCs like the UJA1078A, which offers dual LIN interfaces instead of single LIN.