UJA1076TW/3V3,118

Specialized Overview

The UJA1076TW/3V3,118 is a high-speed CAN 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, which is inter-operable and downward compatible with the TJA1042. 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. Key features include a programmable watchdog with window and timeout modes, a full-duplex SPI interface, two local wake-up input ports, and a limp-home output port. It operates within a temperature range of -40°C to +150°C and supports ±8 kV HBM ESD protection.

Specialized Feature Summary

• Integrates a high-speed CAN transceiver with dedicated low-dropout voltage regulators for improved EMC performance and stable bus levels.
• Provides advanced power management with standby and sleep modes, featuring very low current consumption while maintaining full wake-up capability.
• Includes a programmable watchdog with independent clock source supporting window, timeout, and off modes for enhanced system reliability.
• Offers detailed status reporting and diagnostic capabilities through a 16-bit serial peripheral interface (SPI).

Specialized Applications

• Electronic Control Units (ECU) in automotive applications
• Networking applications controlling power and sensor peripherals
• Systems requiring safe and controlled start-up behavior

Specialized Procurement Notes

Verify component authenticity by checking the manufacturer's marking and package integrity against official datasheet specifications. Confirm the ordering suffix matches the required voltage regulator version and feature set. Ensure compatibility with existing PCB layouts and thermal management designs before procurement.

Specialized Selection Notes

Select this component when a single-chip solution for high-speed CAN communication and power regulation is required. The 3.3 V regulator version is suitable for microcontrollers operating at that voltage level. Consider the external PNP transistor option if higher current capacity or better heat distribution is needed for the main voltage regulator.

Specialized Part Context

The UJA1076 series replaces discrete components commonly found in ECUs. It is designed to work with microcontrollers incorporating a CAN controller. The TW variant indicates the HTSSOP32 package type. This SBC simplifies design by integrating essential functions like voltage regulation, watchdog, and CAN transceiver into one compact package.

Specialized Replacement Considerations

The integrated CAN transceiver is inter-operable and downward compatible with the TJA1042. When replacing discrete components, ensure the new SBC meets the same ISO 11898-2 and ISO 11898-5 standards. Verify that the voltage regulator outputs match the microcontroller requirements.