UJA1076ATW/3V3,112

Specialized Overview

The UJA1076ATW/3V3,112 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, a scalable 3.3 V voltage regulator delivering up to 250 mA for microcontroller supply, and a separate 5 V regulator for the on-board CAN transceiver. The device features an advanced independent watchdog with window and timeout modes, a full-duplex Serial Peripheral Interface (SPI), two local wake-up input ports, and a limp home output port. Designed for automotive applications, it supports remote flash programming via the CAN bus and operates within a temperature range of -40 °C to +150 °C.

Specialized Feature Summary

• Integrates a high-speed CAN transceiver compatible with ISO 11898-2 and ISO 11898-5 standards alongside a dedicated low-dropout voltage regulator for the CAN bus to enhance EMC performance.
• Provides a scalable main voltage regulator capable of delivering up to 250 mA, extendable with an external PNP transistor for improved heat distribution across the PCB.
• Includes an advanced independent watchdog supporting Window and Timeout modes with an on-chip oscillator, ensuring safe and controlled system start-up behavior.
• Features enhanced electromagnetic compatibility (EMC) performance with robust electrostatic discharge (ESD) protection on bus pins and short-circuit proof capabilities.

Specialized Applications

• Electronic Control Units (ECU) in automotive networks
• Power and sensor peripheral control systems
• Microcontroller-based automotive networking applications

Specialized Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm package integrity and pin alignment upon receipt. Ensure storage conditions comply with moisture sensitivity level requirements. Check for physical damage before soldering. Validate part marking against official datasheet specifications to prevent counterfeit components.

Specialized Selection Notes

Select this variant specifically when a 3.3 V output is required for the microcontroller supply. Verify that the integrated watchdog functionality meets system safety requirements. Consider the HTSSOP32 package dimensions for PCB layout constraints. Evaluate thermal dissipation needs, as the external PNP transistor option may be necessary for higher current loads.

Specialized Part Context

This component belongs to the UJA1076A family of high-speed CAN core system basis chips. It serves as a replacement for discrete components commonly found in Electronic Control Units (ECUs). The family includes variants with different voltage outputs and watchdog configurations, designed to simplify ECU design by integrating power management and communication interfaces into a single package.

Specialized Replacement Considerations

Direct substitutes include other UJA1076A variants with matching voltage regulators and package types. Ensure functional equivalence regarding watchdog presence and SPI interface compatibility. Verify pin-to-pin compatibility if replacing existing designs without schematic changes.