ATSAMD21E16L-AF

Overview

The ATSAMD21E16L-AF is a 32-bit ARM Cortex-M0+ microcontroller from the SAM D21E series, designed for functional safety applications. It features 64 kB of Flash memory and 8 kB of SRAM, operating at a maximum clock frequency of 48 MHz. The device supports a supply voltage range of 1.62 V to 3.6 V and operates within a temperature range of -40°C to +125°C. It includes 26 I/O pins, a 12-bit ADC with 14 channels, and a 10-bit DAC. Interfaces include I2C, SPI, USART, LIN, and I2S. The component is AEC-Q100 qualified and housed in a 32-TQFP package.

Feature Summary

• AEC-Q100 qualified for automotive functional safety compliance
• Integrated DMA controller for efficient data transfer management
• Supports multiple communication protocols including LINbus and I2S
• Includes power-on reset, brown-out detection, and watchdog timer

Applications

• Automotive body electronics systems
• Industrial control modules requiring functional safety
• Low-power sensor nodes in harsh environments
• LIN bus network controllers

Procurement Notes

Verify the specific suffix 'AF' corresponds to the 32-TQFP package and industrial temperature grade during sourcing. Confirm AEC-Q100 qualification status through official Microchip documentation or authorized distributor datasheets. Ensure compatibility with required moisture sensitivity levels and reflow soldering profiles specified in the product manufacturing information.

Selection Notes

Select this model when automotive functional safety certification is mandatory alongside low pin count requirements. Compare against ATSAMD21E16B-AF if commercial temperature grades suffice. Consider ATSAMD21E16L-MF for QFN footprint alternatives. Evaluate peripheral counts against application needs, noting the fixed 14-channel ADC configuration inherent to this part number.

Part Context

This component belongs to the SAM D21E family, which extends the standard SAM D21 line with enhanced functional safety features. Unlike general-purpose variants, the E-series integrates hardware safeguards suitable for ISO 26262-aligned designs. It shares the Cortex-M0+ core architecture with other D21 models but differs in memory size and package options compared to higher-density parts like the ATSAMD21J series.

Replacement Considerations

ATSAMD21E16B-AF offers identical electrical specifications but operates at a lower maximum temperature of +85°C. ATSAMD21E16L-MF provides the same functionality in a 32-VQFN package instead of TQFP.