UJA1075ATW/3V3/1J

Specialized Overview

The UJA1075ATW/3V3/1J is a high-speed CAN/LIN core System Basis Chip (SBC) from NXP Semiconductors, designed for automotive Electronic Control Units. It integrates a high-speed CAN transceiver compliant with ISO 11898-2 and ISO 11898-5, and a LIN transceiver supporting LIN 2.2A and SAE J2602 standards. The device features a scalable 3.3 V main voltage regulator delivering up to 250 mA for microcontroller supply, alongside a separate 5 V regulator for the on-board CAN transceiver. It includes an advanced independent watchdog, full-duplex SPI interface, two local wake-up ports, and a limp home output. Operating within a battery voltage range of 4.5 V to 28 V, it supports multiple power modes including Standby, Sleep, and Normal, ensuring safe system start-up and detailed status reporting.

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 extendable via external PNP transistor for improved thermal distribution.
• Includes an advanced independent watchdog with Window and Timeout modes and an on-chip oscillator.
• Provides comprehensive power management with Wake-up via CAN, LIN, or local pins, and low-power Standby/Sleep modes.

Specialized Applications

• Automotive Electronic Control Units (ECU) requiring integrated CAN and LIN networking.
• Power and sensor peripheral control systems using high-speed CAN as the main interface.
• Local sub-bus applications utilizing the LIN interface for distributed control.

Specialized Procurement Notes

Verify the specific ordering suffix against the manufacturer's current documentation to confirm regulatory compliance and package type. Confirm that the 3.3 V regulator version matches the target microcontroller supply requirements. Check for any recent product change notices regarding pin compatibility or operational parameters before finalizing procurement.

Specialized Selection Notes

Select this component when a single-chip solution for CAN and LIN communication is required in automotive ECUs. Ensure the 3.3 V output of the main regulator aligns with the microcontroller's voltage needs. Consider the external PNP transistor option if higher current capability or better heat dissipation across the PCB is necessary for the application design.

Specialized Part Context

The UJA1075A series serves as a core System Basis Chip, replacing discrete components in ECUs. It combines CAN and LIN interfaces with power management and diagnostic functions. The ATW/3V3 variant specifically provides a 3.3 V output for the main regulator, distinguishing it from the 5 V version. It is part of NXP's portfolio for robust automotive networking solutions.

Specialized Replacement Considerations

The UJA1075ATW/5V0/1J is a direct alternative offering a 5 V main regulator instead of 3.3 V. Other variants in the UJA1075A family may differ by regulator voltage or the presence of a watchdog feature. Verify pinout and register compatibility when substituting.