Microchip ATA663254-GAQW: A LIN System Basis Chip for Automotive Networking Applications

The relentless drive towards enhanced vehicle functionality, safety, and comfort has led to a proliferation of electronic control units (ECUs) within modern automobiles. Efficient and reliable communication between these ECUs is paramount, and the Local Interconnect Network (LIN) bus remains a cornerstone for cost-effective communication in body electronics applications. Addressing the critical need for robust networking components, Microchip Technology's ATA663254-GAQW emerges as a highly integrated System Basis Chip (SBC) designed to simplify and secure LIN node design.

This system basis chip is a powerful single-chip solution that consolidates several essential functions typically required for a LIN slave node. At its core, the device features a LIN transceiver compliant with the LIN 2.x, SAE J2602, and ISO 17987-4 standards. This transceiver supports data rates up to 20 kbps and is engineered for exceptional electromagnetic compatibility (EMC) and electrostatic discharge (ESD) performance, ensuring reliable data transmission in the electrically harsh automotive environment.

Beyond the transceiver, the ATA663254-GAQW integrates a 50 mA low-dropout (LDO) voltage regulator with enable functionality. This regulator can deliver a stable 3.3 V or 5 V supply from the vehicle's battery, directly powering the associated microcontroller (MCU) and other local circuitry. This integration drastically reduces the external component count, saving valuable board space and lowering the overall system bill of materials (BOM). Furthermore, the chip includes a window watchdog and a high-voltage wake-up input, which are crucial for managing power modes and ensuring the system's responsiveness to external events. The inclusion of fail-safe features such as overtemperature protection and loss of battery detection enhances the system's robustness and reliability.

A key application for the ATA663254-GAQW is in distributed sensor modules, such as those for rain/light detection or seat position sensing, where a small form factor and low power consumption are essential. It is equally suited for actuator control modules like window lifters, mirror controls, and smart switches. By providing the physical layer interface, power supply, and system management in one package, this SBC allows designers to develop compact, efficient, and highly reliable LIN nodes, accelerating time-to-market for a wide range of automotive peripherals.

ICGOO

DFIND: The Microchip ATA663254-GAQW is a highly integrated LIN System Basis Chip that provides a complete, space-saving solution for automotive slave nodes. By combining a standards-compliant LIN transceiver, a voltage regulator, and key system management features like a watchdog timer, it significantly enhances design simplicity, reduces costs, and improves the overall robustness of in-vehicle networking applications.

Keywords:

LIN Transceiver

System Basis Chip (SBC)

Automotive Networking

Voltage Regulator

ECU Integration