The ARM Cortex-M33 is a 32-bit microcontroller core designed by ARM Holdings, a British semiconductor and software design company. It is part of the Cortex-M series, widely used in embedded systems for industries such as automotive, industrial automation, consumer electronics, and IoT. The Cortex-M33 features enhanced security, low power consumption, and high performance, making it ideal for real-time applications. ARM licenses this core to various chip manufacturers globally, enabling them to integrate it into their MCU products.