ATSAMC21N18A

The ATSAMC21N18A is a high-performance 32-bit ARM Cortex-M0+ microcontroller from Microchip Technology, designed for low-power and cost-sensitive applications. It operates at a maximum clock speed of 48 MHz, providing efficient processing capabilities while maintaining minimal power consumption. The device features 128 KB of flash memory and 32 KB of SRAM, offering ample storage for firmware and runtime data in embedded systems. This microcontroller integrates a rich set of peripherals, including two USARTs, one SPI, one I2C, and a USB 2.0 full-speed interface, enabling versatile communication options for system connectivity. It also includes a 12-bit analog-to-digital converter (ADC) with up to 16 channels, supporting precision sensing applications such as temperature, voltage, or light detection. Additionally, the ATSAMC21N18A offers hardware-based security features like secure boot, read-out protection, and tamper detection, ensuring robust protection against unauthorized access or modification. Designed for energy efficiency, the ATSAMC21N18A supports multiple low-power modes—including sleep, standby, and backup—allowing developers to optimize power consumption based on application requirements. Its flexible power management system enables seamless transitions between active and idle states, making it ideal for battery-powered devices such as portable sensors, smart meters, and wearable electronics. The chip is built on a mature 45 nm process technology, which enhances performance per watt and reduces manufacturing costs. It is available in a compact QFN48 package, facilitating easy integration into space-constrained designs. The device is supported by Microchip’s comprehensive development ecosystem, including Atmel Studio, MPLAB X IDE, and a wide range of evaluation kits, accelerating time-to-market for new products. Common applications include industrial control systems, consumer electronics, IoT endpoints, and automotive sensors. Its combination of performance, low power, and integrated peripherals makes it suitable for applications requiring reliable real-time processing, such as motor control, data acquisition, and user interface management. The ATSAMC21N18A also supports advanced features like programmable logic for custom signal conditioning and wake-up sources from external events, enhancing system responsiveness and flexibility.