STMicroelectronics Introduces Extensible Memory Solution for Automotive Microcontrollers

STMicroelectronics has announced Stellar with xMemory, a new generation of extensible memory embedded in its Stellar series of automotive microcontrollers that transforms the development process for software-defined vehicles (SDV) and electrification platforms. The technology will enter production later in 2025, beginning with the Stellar P6 MCUs targeted at new drivetrain trends and architectures for electric vehicles.

The innovative solution addresses a critical challenge in automotive development by offering a single device with extensible memory rather than requiring manufacturers to manage multiple devices with varying memory options. This approach allows carmakers to future-proof their designs with capacity for additional innovation later in the development cycle, thereby reducing costs and accelerating time to market through a simplified supply chain.

"ST has developed the ultimate memory technology for the automobile market with the smallest bit cell to meet the endless need for more memory. Stellar with xMemory will streamline the car architectures of tomorrow, making them more cost-effective and significantly reduce development time for carmakers," said Luca Rodeschini, Group Vice President and General Purpose and Automotive Microcontrollers Division General Manager at STMicroelectronics.

The xMemory technology addresses the growing memory bottleneck caused by increasing software complexity, new features, regulatory requirements, memory-intensive AI and machine learning applications, and over-the-air updates. By enabling memory extension during either the development phase or when the vehicle is in the field, xMemory provides flexibility for unlimited application upgrades.

Based on ST's proprietary phase-change memory (PCM) technology, xMemory offers superior density compared to other embedded non-volatile memory technologies. According to Axel Aue, Vice President at Bosch, "With the embedded Phase Change Memory technology, Stellar offers a robust and flexible memory concept to create highly performant, adaptable microcontrollers for automotive usage. The technology provides application advantages compared to other memory technologies, such as RRAM and MRAM."

The latest-generation PCM technology will be available across ST's upcoming Arm-based Stellar P and G automotive MCUs, which are designed to simplify vehicle electrical architectures for increased power, flexibility, and safety. The company's Stellar portfolio includes Integration MCUs for centralized zone and domain controllers and body applications, as well as Electrification MCUs optimized for EV traction-module power converters.