UJA1076ATW/3V3,118

Specialized Overview

The UJA1076ATW/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, 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 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 an operating temperature range from -40 °C to +150 °C. The component is housed in a 32-lead HTSSOP package.

Specialized Feature Summary

• Integrates a high-speed CAN transceiver with dedicated low-dropout voltage regulators for both the microcontroller and the CAN bus to enhance EMC performance.
• Provides advanced system control through a programmable watchdog, detailed status reporting via SPI, and safe start-up behavior.
• Supports multiple power modes including Standby and Sleep with very low current consumption while maintaining full wake-up capability.
• Features robust protection mechanisms including ±8 kV ESD protection on bus pins, short-circuit proof CAN lines, and overtemperature shutdown.

Specialized Applications

• Electronic Control Units (ECU) requiring integrated CAN networking and power management
• Automotive sensor peripherals controlled via high-speed CAN interfaces
• Power distribution modules utilizing external PNP transistor heat dissipation

Specialized Procurement Notes

Verify the specific ordering suffix against the manufacturer's datasheet to confirm regulator voltage and feature set. Ensure the component meets automotive environmental standards required for the target application. Confirm package type and pin compatibility during integration planning.

Specialized Selection Notes

Select this variant when a fixed 3.3 V output is required for the main voltage regulator. Consider the UJA1076A family if additional LIN interfaces or different voltage options are needed. Evaluate thermal requirements as the 250 mA capacity may necessitate external components for higher loads.

Specialized Part Context

This component belongs to the UJA1076A series of high-speed CAN core system basis chips. It replaces discrete components commonly found in ECUs by integrating the transceiver, regulators, and control logic into a single package. The series is designed for automotive applications demanding reliable communication and power management.

Specialized Replacement Considerations

Direct substitutes include other variants within the UJA1076A family, such as those with 5 V regulators or without the watchdog suffix. Verify pinout and register compatibility before replacing existing designs.