ATSAMC21E18A-MNT

Overview

The ATSAMC21E18A-MNT is a 32-bit microcontroller based on the ARM Cortex-M0+ core, operating at a maximum frequency of 48MHz. It features 256KB of flash memory and 32KB of SRAM. The device supports a supply voltage range of 2.7V to 5.5V and includes 26 I/O lines. Analog capabilities consist of ten 12-bit ADC channels, one 16-bit ADC channel, and one 10-bit DAC. Connectivity options include CANbus, I2C, LINbus, SPI, and UART/USART interfaces.

Feature Summary

• Supports Functional Safety (FuSa) requirements for industrial applications
• Includes Microchip QTouch technology for capacitive touch user interfaces
• Features an event system for direct peripheral-to-peripheral signal transfer without CPU intervention
• Provides DMA controller support for efficient data movement

Applications

• Industrial automation systems
• Appliance control units
• Capacitive touch interface implementations
• CAN bus communication nodes

Procurement Notes

Verify the specific package variant, as the MNT suffix denotes a VQFN-32 form factor. Confirm that the selected component meets the required functional safety standards if deployed in safety-critical environments. Ensure compatibility with existing firmware due to pin-out similarities within the SAM C21 family while checking for any silicon errata relevant to the manufacturing date code.

Selection Notes

Select this model when 256KB of program storage and 32KB of RAM are required alongside robust analog input capabilities. It is suitable for designs needing multiple serial communication interfaces and hardware-accelerated touch sensing. Consider alternative pin counts or memory sizes from the same family if the 26 I/O limit or specific peripheral configurations do not match the board layout constraints.

Part Context

This component belongs to the Microchip SAM C21 series, which is optimized for 5V applications and industrial environments. The series shares architectural similarities with the SAM D and SAM C families, allowing for code reuse and migration flexibility. The ATSAMC21E18A specifically targets applications requiring reliable connectivity and advanced analog processing within a compact footprint.

Replacement Considerations

ATSAMC21E18A-AUT offers identical specifications in a TQFP-64 package. ATSAMC21J18A-MNT provides the same core performance but includes additional I/O lines and a larger VQFN-64 package.