ATSAMC21N18A-AN

Overview

The ATSAMC21N18A-AN is an ARM Cortex-M0+ microcontroller from the SAM C21 series, designed for industrial and commercial applications in noisy environments. It features a 48 MHz CPU, 256 kB of system flash memory, and 32 kB of SRAM. The device operates within a voltage range of 2.7 V to 5.5 V and supports an extended temperature range from -40°C to +105°C. It includes advanced peripherals such as CAN-FD, SERCOM modules, and a Peripheral Touch Controller (PTC).

Feature Summary

• Integrated CAN-FD interface with selectable pin positions for external transceiver switching.
• Peripheral Touch Controller (PTC) supporting up to 256 channels for capacitive touch and proximity sensing.
• Advanced motor control peripherals including deterministic fault protection and configurable dead-time.
• High-speed communication via multiple SERCOM modules supporting SPI, I2C, LIN, and USART protocols.

Applications

• Industrial automation controllers requiring robust communication interfaces.
• Commercial appliances with user interface needs utilizing capacitive touch controls.
• Motor control systems benefiting from hardware-accelerated PWM and fault protection.
• Automotive subsystems leveraging AEC-Q100 qualification and CAN-FD capabilities.

Procurement Notes

Verify the specific suffix 'ANT' or 'AN' against the official Microchip datasheet to confirm package type and temperature grade. Ensure compatibility with existing PCB footprints for the TQFP-48 package. Confirm that the selected variant meets the required operating temperature range for the target application environment before finalizing procurement.

Selection Notes

Select this component when high noise immunity and extensive connectivity are required. The inclusion of CAN-FD and PTC makes it suitable for complex embedded systems. Compare memory sizes across the SAM C21 family to ensure 256 kB flash and 32 kB RAM align with software requirements. Verify that the 48 MHz clock speed satisfies real-time processing constraints.

Part Context

This part belongs to the Microchip SAM C21 family of ARM Cortex-M0+ microcontrollers. These devices are optimized for cost-sensitive industrial and commercial markets. The family shares common architectural features but varies in memory size, package options, and peripheral availability. The ATSAMC21N18A-AN specifically targets applications needing robust communication and touch sensing capabilities.

Replacement Considerations

Check for direct substitutes within the SAM C21G or SAM C21E series with matching memory and package configurations. Verify pin-to-pin compatibility if replacing on existing boards. Ensure that any alternative part maintains the same AEC-Q100 qualification and temperature rating.