Microchip ATA663454-GDQW-VAO: A LIN System Basis Chip for Automotive Networks

The increasing complexity of automotive electronic architectures demands robust and cost-effective communication solutions for sub-networks. The Local Interconnect Network (LIN) bus remains a cornerstone for these applications, providing a reliable serial communication protocol for connecting sensors and actuators. Addressing the needs of modern vehicle design, Microchip Technology's ATA663454-GDQW-VAO emerges as a highly integrated System Basis Chip (SBC) that combines a LIN transceiver with vital system functions into a single package.

This SBC is engineered to serve as a central hub for LIN slave nodes or as a compact solution for space-constrained master applications. Its core is a fully compliant LIN 2.x/SAE J2602 transceiver, capable of handling data rates up to 20 kbps. The device is designed for superior electromagnetic compatibility (EMC) and electrostatic discharge (ESD) protection, boasting impressive ±8 kV ESD protection (IEC 61000-4-2) on the LIN bus pin, which ensures resilience in the harsh automotive environment.

Beyond the transceiver, the ATA663454 integrates a 50 mA low-dropout voltage regulator (LDO). This regulator provides a stable 5 V or 3.3 V supply for an associated microcontroller or other local circuitry, simplifying power management and reducing the total component count on the PCB. Furthermore, the chip includes a window watchdog and a high-voltage wake-up input, enhancing system safety and enabling ultra-low power consumption in sleep mode, where current draw can drop to a mere few microamps. This feature is critical for meeting the stringent quiescent current requirements of modern automobiles.

Housed in a compact and thermally efficient VQFN-24 (5x5mm) package, the ATA663454-GDQW-VAO is qualified for automotive-grade temperatures (-40°C to +150°C junction temperature). It is AEC-Q100 qualified, making it a dependable choice for body control modules, sensor clusters, lighting systems, and door/window control units.

ICGOODFIND: The Microchip ATA663454-GDQW-VAO is a highly integrated, robust, and space-efficient SBC that simplifies design and enhances reliability for LIN network nodes, making it an excellent choice for a wide array of automotive body electronics applications.

Keywords: LIN Transceiver, System Basis Chip (SBC), Automotive-Grade, ESD Protection, Low Quiescent Current.