UJA1075ATW/3V3,118

Specialized Overview

The UJA1075ATW/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 supporting LIN 2.0 through 2.2A standards. The device includes a scalable 3.3 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. Key features include a programmable watchdog, full-duplex SPI interface, two local wake-up ports, and a limp home output. It operates within a temperature range of -40 °C to +150 °C and is housed in a 6.1 mm × 11 mm HTSSOP32 package.

Specialized Feature Summary

• Integrates high-speed CAN and LIN transceivers with enhanced EMC performance and robust ESD protection.
• Features a scalable 3.3 V main voltage regulator capable of supplying up to 250 mA, with options for external current expansion.
• Includes a dedicated 5 V voltage regulator for the CAN transceiver to ensure stable operation and improved electromagnetic compatibility.
• Provides advanced system control via a programmable watchdog, SPI interface, and multiple wake-up sources including CAN, LIN, and local pins.

Specialized Applications

• Electronic Control Units (ECUs) requiring integrated power management and bus communication.
• Automotive networking applications controlling power and sensor peripherals.
• Systems utilizing high-speed CAN as the main network interface and LIN as a local sub-bus.

Specialized Procurement Notes

Verify the specific ordering suffix

Specialized Selection Notes

Select this variant when a 3.3 V output for the microcontroller is required. Ensure the application does not demand the independent watchdog functionality found in the 'W' suffix versions. Confirm that the HTSSOP32 package dimensions and thermal requirements align with the PCB layout design. Verify compatibility with the target microcontroller's SPI interface and reset timing requirements.

Specialized Part Context

The UJA1075A series serves as a core System Basis Chip designed to replace discrete components in ECUs. It consolidates CAN and LIN interfaces with power regulation and system control. This specific part belongs to the family offering a 3.3 V regulator output, distinct from the 5 V version. It is engineered for automotive environments, emphasizing reliability, low-power modes, and safe startup behaviors.

Specialized Replacement Considerations

Direct replacements must match the HTSSOP32 package and 3.3 V regulator output. Variants like UJA1075ATW/3V3 differ by including a watchdog. Cross-family comparisons should consider pin compatibility and electrical specifications rather than assuming interchangeability without detailed datasheet review.