ATSAMD21E18A-AU

Overview

The ATSAMD21E18A-AU 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 in-system programmable flash memory and 32 kB of SRAM. The device includes a 12-bit ADC with 10 channels and a 10-bit DAC. It supports multiple communication interfaces including I2C, SPI, USART, LIN, and USB. Operating voltage ranges from 1.62 V to 3.63 V within an industrial temperature range of -40°C to +85°C.

Feature Summary

• Integrates ARM Cortex-M0+ processor for efficient code execution
• Supports capacitive touch user interface elements
• Includes full-speed USB 2.0 embedded host and device interface
• Features event system for peripheral-to-peripheral communication

Applications

• Industrial control systems requiring functional safety
• Consumer devices with capacitive touch interfaces
• USB-enabled peripheral devices
• Low-power sensor nodes

Procurement Notes

Verify the specific suffix 'AU' corresponds to the TQFP-32 package and lead-free RoHS compliance. Confirm the AEC-Q100 qualification status if automotive application is intended. Check current datasheet revisions for errata related to USB or clock configurations before finalizing design implementation.

Selection Notes

Select this component when a balance of moderate flash capacity and USB connectivity is required in a compact 32-pin package. Compare against ATSAMD21G series for increased I/O count or ATSAMD21J series for larger memory options. Ensure the 48 MHz performance meets real-time processing requirements.

Part Context

This part belongs to the SAM D21 family of Microchip Technology microcontrollers. The family shares pin compatibility and peripheral modules across different memory variants. The E-series specifically targets applications needing USB functionality with a smaller footprint compared to higher-pin-count counterparts.

Replacement Considerations

ATSAMD21E18A-MU offers the same electrical specifications in a QFN-32 package.