UJA1076TW/3V3/WD,1

Specialized Overview

The UJA1076TW/3V3/WD,1 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, an advanced independent watchdog, and two voltage regulators. The main regulator V1 provides a scalable 3.3 V output delivering up to 250 mA for microcontroller supply. A separate 5 V regulator (V2) powers the on-board CAN transceiver. The device features a full-duplex Serial Peripheral Interface (SPI), two local wake-up input ports, and a limp-home output port. It operates within a battery voltage range of 4.5 V to 28 V and supports data rates up to 1 Mb/s.

Specialized Feature Summary

• Integrates a high-speed CAN transceiver with dedicated low-dropout voltage regulator for improved EMC performance
• Includes an advanced independent watchdog supporting Window and Timeout modes with an on-chip oscillator
• Features a scalable 3.3 V main voltage regulator capable of delivering up to 250 mA for microcontroller power
• Provides detailed status reporting and safe system start-up behavior through SPI communication

Specialized Applications

• Electronic Control Units (ECU) requiring integrated CAN interface and power management
• Automotive networking applications controlling power and sensor peripherals via high-speed CAN
• Systems requiring remote flash programming capabilities over the CAN bus

Specialized Procurement Notes

Verify the specific ordering suffix against the manufacturer's current product data sheet to confirm the exact voltage regulator version and package type. Ensure compatibility with the target microcontroller's SPI interface requirements. Check for any end-of-life or obsolescence notices prior to finalizing procurement plans.

Specialized Selection Notes

Select this component when a single-package solution for CAN communication and ECU power management 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 distribution or thermal dissipation across the PCB is necessary for the application design.

Specialized Part Context

This part belongs to the UJA1076 family of System Basis Chips designed specifically for automotive electronic control units. It replaces discrete components typically found in ECUs by combining the CAN transceiver, voltage regulation, and watchdog functions into a single HTSSOP32 package. The family includes variants with different regulator voltages and watchdog configurations.

Specialized Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.