ATSAMD21E16L-AFT

Overview

The ATSAMD21E16L-AFT is a 32-bit ARM Cortex-M0+ microcontroller from the SAM D21E series, designed for functional safety applications. It features 64 kB of in-system self-programmable flash memory and 8 kB of SRAM. The device operates at a maximum clock frequency of 48 MHz and supports a supply voltage range of 1.62 V to 3.63 V. It includes an internal oscillator, AEC-Q100 Grade 1 qualification for automotive use, and operates within a temperature range of -40°C to +125°C. The component is housed in a 48-TQFP package with exposed pad.

Feature Summary

• AEC-Q100 qualified for automotive functional safety compliance
• Integrated 12-bit ADC with multiple channels and 10-bit DAC
• Supports multiple serial communication interfaces including SPI, I2C, USART, LIN, and I2S
• Includes DMA controller and event system for efficient peripheral management

Applications

• Automotive body electronics and control modules
• Industrial motor control systems
• Consumer devices requiring robust fault tolerance
• Battery-powered IoT nodes with strict power constraints

Procurement Notes

Verify the specific suffix 'AFT' corresponds to the 48-TQFP package and tape-and-reel packaging format. Confirm that the 'L' designation indicates the extended temperature range and automotive grade. Ensure compatibility with existing PCB footprints for the 48-lead thin quad flat package. Check for any recent product change notifications regarding pinout or electrical characteristics updates.

Selection Notes

Select this variant when automotive reliability standards are mandatory alongside low-power operation. The 64 kB flash size suits moderate firmware complexity without external memory. Consider the 48-TQFP package for improved thermal dissipation compared to smaller QFN options. Verify that the 26 available GPIOs meet interface requirements before choosing over higher-pin-count family members.

Part Context

This part belongs to the Microchip SAM D21E family, which extends the standard SAM D21 line with enhanced functional safety features. It shares architectural compatibility with other SAM D21 variants but adds specific certifications for automotive environments. The E-series designation typically denotes optimized performance and reliability for critical applications.

Replacement Considerations

ATSAMD21E16L-AF: Identical core specifications but packaged in TQFP-32 instead of TQFP-48. Requires PCB footprint modification. ATSAMD21G16B-AFT: Similar specifications but may lack specific automotive FuSa documentation depending on the exact revision. Verify pin-to-pin compatibility and software library support before substitution.