ATSAMC21E18A-MUT

Overview

The ATSAMC21E18A-MUT is a 32-bit microcontroller based on the ARM Cortex-M0+ core, operating at a maximum frequency of 48 MHz. It features 256 kB of embedded Flash memory and 32 kB of SRAM. The device includes two CAN modules, twelve DMA channels, and a Microchip QTouch peripheral controller for capacitive touch applications. It supports a supply voltage range of 2.7 V to 5.5 V and operates within a temperature range of -40°C to +85°C. The component is housed in a 32-VFQFN package with 26 I/O lines.

Feature Summary

• Optimized for 5V industrial automation and appliance applications
• Integrated Microchip QTouch hardware support for buttons, sliders, and wheels
• Pin-compatible migration path across the SAM C21 series
• Includes event system for efficient peripheral signal transmission

Applications

• Industrial automation controllers
• Appliance control systems
• Capacitive touch user interfaces
• CAN bus communication nodes

Procurement Notes

Verify the specific suffix 'MUT' corresponds to the tape and reel packaging format as indicated by distributor listings. Confirm the operating temperature grade matches the application requirements, as variants exist for extended temperatures. Ensure the pinout compatibility aligns with existing PCB layouts if migrating from other SAM C21 devices. Cross-reference the datasheet revision date to ensure all errata are accounted for during design implementation.

Selection Notes

Select this model when a 5V tolerant interface is required alongside CAN connectivity and touch sensing capabilities. The 256 kB Flash size suits applications needing substantial code storage without external memory. Consider the 32-pin VFQFN package constraints for board space limitations. Verify that the 26 available I/O pins meet the system's peripheral count requirements before finalizing the part number choice.

Part Context

This component belongs to the Microchip SAM C21 family of ARM Cortex-M0+ microcontrollers. The family is designed for cost-sensitive, low-power applications requiring high performance per watt. Devices in this series share common peripheral blocks and instruction sets, facilitating software reuse. The E-series typically offers mid-range memory configurations suitable for general-purpose control tasks.

Replacement Considerations

ATSAMC21E18A-AU: Same electrical specifications but in a TQFP-32 package instead of VFQFN. ATSAMC21J18A-MUT: Higher I/O count (52 pins) and larger package (64-QFN), maintaining similar core and memory specs.