ATSAMC21E18A-AUT

Overview

The ATSAMC21E18A-AUT is a 32-bit microcontroller based on the ARM Cortex-M0+ core, belonging to the SAM C21 series with Functional Safety (FuSa) certification. It features 256KB of in-system programmable flash memory and 32KB of SRAM. The device operates at a maximum clock frequency of 48MHz and supports a supply voltage range of 2.7V to 5.5V. It includes 26 general-purpose I/Os, multiple communication interfaces such as CANbus, I2C, LINbus, SPI, and USART, and an internal oscillator. The component is rated for an operating temperature range of -40°C to 85°C and is housed in a TQFP-32 package.

Feature Summary

• Functional Safety (FuSa) certified design compliant with automotive safety standards
• Integrated analog peripherals including 10-channel 12-bit ADC and 1-channel 10-bit DAC
• Supports direct memory access (DMA) for efficient data transfer management
• Includes hardware security features such as Memory Protection Unit (MPU)

Applications

• Automotive body electronics and comfort systems
• Industrial control applications requiring functional safety compliance
• Smart sensors and actuators with analog signal processing needs
• Communication gateways utilizing CANbus or LINbus protocols

Procurement Notes

Verify the specific suffix 'AUT' indicates AEC-Q100 qualification and extended temperature ratings when sourcing. Confirm package integrity upon receipt, as surface-mount devices are sensitive to moisture. Cross-reference the manufacturer's latest errata sheet for known silicon revisions before finalizing production designs. Ensure ESD precautions are followed during handling and assembly processes.

Selection Notes

Select this model when automotive functional safety certification is mandatory for the application. Choose over non-FuSa variants if regulatory compliance for safety-critical systems is required. Consider the 256KB flash capacity for complex firmware requirements. Verify that the TQFP-32 package fits the PCB layout constraints compared to QFN alternatives in the same family.

Part Context

This component is part of Microchip's SAM C21 family, which targets automotive and industrial markets. It shares architectural similarities with the SAM D21 but adds functional safety features. The E18A designation typically denotes the 256KB flash and 32KB RAM configuration within the E-series footprint options.

FAQ

Is the ATSAMC21E18A-AUT qualified for automotive applications?

Yes, it is AEC-Q100 qualified and belongs to the Functional Safety (FuSa) certified SAM C21 series.

What is the maximum operating temperature for this device?

The specified operating temperature range extends up to 85°C.

Does this MCU support CAN bus communication?

Yes, the device includes integrated CANbus interface capabilities alongside other standard serial communications.