UJA1078TW/5V0/WD:1

Specialized Overview

The UJA1078TW/5V0/WD:1 is a System Basis Chip (SBC) integrating a high-speed CAN transceiver, two LIN transceivers, and power management functions. It features a 250 mA main voltage regulator (V1) with 5 V output and a dedicated 5 V regulator (V2) for the CAN transceiver. The device includes an advanced independent watchdog with window and timeout modes, a 16-bit SPI interface, and two local wake-up ports. Designed for automotive ECUs, it supports ISO 11898-2/5 and LIN 2.1 standards, offering ±8 kV HBM ESD protection and ±58 V short-circuit proof bus pins in a 32-lead HTSSOP package.

Specialized Feature Summary

• Integrates high-speed CAN and dual LIN transceivers with dedicated low-dropout regulators for microcontroller and bus power.
• Features an advanced programmable watchdog with window and timeout modes and an on-chip oscillator.
• Provides robust automotive-grade protection including ±8 kV HBM ESD, ±6 kV IEC 61000-4-2, and ±58 V short-circuit proof bus pins.
• Supports safe system start-up, detailed status reporting via SPI, and limp home functionality.

Specialized Applications

• Electronic Control Units (ECU) requiring integrated CAN/LIN networking and power management
• Automotive sensor peripherals controlled via local sub-busses
• Power distribution systems extendable with external PNP transistors

Specialized Procurement Notes

Verify the specific ordering suffix against the manufacturer's current datasheet to confirm regulatory compliance and package variations. Ensure the component matches the required voltage regulator version and watchdog configuration for your application design.

Specialized Selection Notes

Select this variant when a 5 V microcontroller supply is required alongside the CAN transceiver regulator. Consider the external PNP transistor option if higher current capability or improved thermal dissipation distribution across the PCB is necessary for the specific load profile.

Specialized Part Context

This component belongs to the NXP UJA1078 family of System Basis Chips. Variants within the family differ primarily by the main voltage regulator output voltage (3.3 V vs. 5 V) and the inclusion of the watchdog timer function. The TW designation indicates the HTSSOP32 package type.

Specialized Replacement Considerations

The UJA1078ATW/5V0WD,1 is a documented equivalent part number within the same product family, sharing identical functional specifications and pinout compatibility.