ATSAMD21E18A-MU

Overview

The ATSAMD21E18A-MU is a 32-bit ARM Cortex-M0+ microcontroller from the SAM D21 family, manufactured by Microchip Technology. It features 256 kB of in-system self-programmable flash memory and 32 kB of SRAM data RAM. The device operates with a maximum clock frequency of 48 MHz and supports a supply voltage range of 1.62 V to 3.63 V. It includes ten 12-bit ADC channels and one 10-bit DAC. The component provides 26 general-purpose I/O lines and integrates communication interfaces including I2C, I2S, LIN, SPI, and USART. It is housed in a 32-pin TQFP package and is qualified under AEC-Q100 standards for automotive applications.

Feature Summary

• Integrates an ARM Cortex-M0+ core with up to 48 MHz processing speed.
• Includes advanced analog peripherals such as a 12-bit ADC and 10-bit DAC.
• Supports multiple serial communication protocols including SPI, I2C, and USART.
• Qualified for automotive use according to AEC-Q100 standards.

Applications

• Automotive infotainment systems
• Industrial control panels
• Smart home automation devices

Procurement Notes

Verify the specific suffix 'MU' corresponds to the TQFP-32 package variant during sourcing. Confirm AEC-Q100 qualification status if automotive compliance is required. Check current production lifecycle status as availability may vary. Ensure ESD handling procedures are followed due to moisture sensitivity classification.

Selection Notes

Select this model when a balance of moderate code storage and robust analog capabilities is needed within a compact 32-pin footprint. It is suitable for designs requiring AEC-Q100 reliability without the higher pin count or cost of larger packages. Compare against the ATSAMD21E15A-MU if reduced memory capacity suffices for the application requirements.

Part Context

This component belongs to the SAM D21 series of low-power 32-bit MCUs based on the ARM Cortex-M0+ core. The series is designed for applications requiring efficient code execution and integrated analog features. The 'E' designation typically indicates specific memory configurations within the family, distinguishing it from other variants like the G or J series which offer different pin counts or peripheral sets.

Replacement Considerations

The ATSAMD21E15A-MU serves as a lower-memory alternative within the same package. For pin-compatible upgrades with increased resources, consider the ATSAMD21J18A-MUT, though it utilizes a QFN-64 package. Verify software compatibility when migrating between SAM D21 variants due to potential peripheral configuration differences.