UJA1079ATW/3V3,118

Specialized Overview

The UJA1079ATW/3V3,118 is a LIN core System Basis Chip (SBC) from NXP Semiconductors designed for automotive Electronic Control Units. It integrates a LIN transceiver compliant with LIN 2.2A and SAE J2602 standards, alongside a scalable 3.3 V voltage regulator capable of delivering up to 250 mA. 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. Packaged in a 32-lead HTSSOP plastic thermal enhanced thin shrink small outline package (SOT549-1), it supports low-power concepts and safe system start-up behavior.

Specialized Feature Summary

• Integrates a LIN transceiver compliant with LIN 2.2A, LIN 2.2, LIN 2.1, LIN 2.0, LIN 1.3, and SAE J2602 standards, featuring a low slope mode for optimized EMC performance.
• Includes a scalable 3.3 V voltage regulator delivering up to 250 mA, extendable with an external PNP transistor for improved heat distribution over the PCB.
• Features an advanced independent watchdog with Window and Timeout modes, an on-chip oscillator, and configurable interrupt outputs for system status monitoring.
• Provides robust protection including ±8 kV ESD protection on bus pins, ±58 V short-circuit proof capability, and transient protection per ISO 7637-3.

Specialized Applications

• Automotive Electronic Control Units (ECU) requiring LIN interface connectivity
• Power and sensor peripheral control networks using LIN as a local sub-bus
• Microcontroller power management systems with integrated reset and watchdog functions

Specialized Procurement Notes

Verify the specific ordering suffix '118' against the manufacturer's current documentation to confirm packaging details and availability status. Ensure compatibility with the required 3.3 V regulator version and confirm if the 'W' suffix for the watchdog feature is necessary for the application design.

Specialized Selection Notes

Select this component when a dedicated LIN SBC is required with a fixed 3.3 V output. Consider the UJA1079ATW/5V3 variant if a 5 V regulator is needed instead. Verify that the integrated watchdog functionality meets safety requirements; otherwise, select the non-W variant. Ensure the HTSSOP32 package fits the PCB layout constraints.

Specialized Part Context

The UJA1079A series replaces discrete components in ECUs by combining a LIN transceiver, voltage regulator, and watchdog into a single package. It is part of NXP's LIN core system basis chip family, designed to support networking applications for controlling power and sensor peripherals via the LIN interface.

Specialized Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material. Consult official NXP documentation for cross-reference information or updated product recommendations.