UJA1075ATW/5V0/WD,

Specialized Overview

The UJA1075ATW/5V0/WD,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 standards, and a LIN transceiver supporting LIN 2.2A, LIN 2.2, LIN 2.1, LIN 2.0, and LIN 1.3 protocols. The device includes a 250 mA scalable voltage regulator for microcontroller supply, a separate 5 V regulator for the CAN transceiver, and an advanced independent watchdog with window and timeout modes. It features a full-duplex Serial Peripheral Interface (SPI), two local wake-up input ports, and a limp home output port. The component operates within a temperature range of -40 °C to 125 °C and is housed in a 32-lead HTSSOP package.

Specialized Feature Summary

• Integrates high-speed CAN and LIN transceivers with enhanced electromagnetic compatibility performance and robust transient protection.
• Provides a scalable main voltage regulator extendable via external PNP transistor for improved heat distribution and current capability.
• Includes a programmable watchdog with independent clock source and multiple operational modes for system safety monitoring.
• Features detailed status reporting and diagnostic capabilities through a 16-bit SPI interface for configuration and control.

Specialized Applications

• Electronic Control Units (ECU) requiring integrated power management and networking interfaces
• Automotive sensor peripheral control systems
• Power distribution networks in vehicle architectures

Specialized Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to confirm regulatory compliance and feature set. Ensure the component matches the required voltage regulator version and watchdog inclusion before procurement. Cross-reference the datasheet revision date to confirm technical specifications align with project requirements.

Specialized Selection Notes

Select this variant when a 5 V microcontroller supply is required alongside high-speed CAN and LIN connectivity. Consider the external PNP transistor option if higher current dissipation or thermal management across the PCB is necessary. Verify that the microcontroller supports the required SPI interface and CAN controller integration for proper system operation.

Specialized Part Context

This component belongs to the UJA1075A family of System Basis Chips designed for automotive applications. It replaces discrete components typically found in ECUs by combining transceivers, regulators, and control logic into a single package. The family offers variations in voltage regulator output and watchdog functionality to suit different ECU design needs.

Specialized Replacement Considerations

Direct substitutes include other UJA1075A variants with matching voltage and watchdog configurations, such as UJA1075ATW/5V0/WDJ,1. Ensure pinout compatibility and functional equivalence regarding voltage regulator outputs and communication interfaces before substitution.

Specialized FAQ

What standards does the integrated CAN transceiver comply with?

The high-speed CAN transceiver is compatible with ISO 11898-2:2003 and ISO 11898-5:2006 standards.

How can the current capability of the main voltage regulator be increased?

The 250 mA voltage regulator can be extended with an external PNP transistor to increase current capability and improve heat distribution over the PCB.

What watchdog modes are supported by this component?

The component supports Window mode, Timeout mode (with optional cyclic wake-up), and Off mode for the advanced independent watchdog.