ATSAMD21G17A-AFT

Overview

The ATSAMD21G17A-AFT is a 32-bit microcontroller based on the ARM Cortex-M0+ core, operating at a maximum frequency of 48MHz. It features 128KB of in-system programmable Flash memory and 16KB of SRAM. The device includes an internal oscillator and supports a supply voltage range of 1.62V to 3.6V. It offers 38 general-purpose I/O lines and integrates multiple communication interfaces including USB, SPI, I2C, UART/USART, LINbus, and I2S. Analog capabilities consist of 14-channel 12-bit ADCs and one 10-bit DAC. Peripherals include DMA, PWM, WDT, and power-on reset.

Feature Summary

• Integrates Functional Safety (FuSa) design characteristics within the SAM D21G series architecture.
• Supports Full-Speed USB connectivity with integrated transceiver for direct host or device interfacing.
• Provides advanced analog conversion through multiple high-resolution ADC channels and a dedicated DAC output.

Applications

• Industrial control systems requiring functional safety compliance
• USB-enabled peripheral devices and human-machine interfaces
• Low-power embedded applications utilizing internal oscillators

Procurement Notes

Verify the specific suffix 'AFT' against the manufacturer's current datasheet to confirm package dimensions and thermal characteristics. Ensure the selected variant meets the required temperature grade, as automotive-grade versions may carry different suffixes such as 'AFTTR'. Cross-reference the part number with official Microchip documentation to confirm RoHS compliance and lifecycle status before finalizing procurement specifications.

Selection Notes

Select this component when a balance of moderate program memory and functional safety features is required. The 48-TQFP package suits designs needing surface-mount assembly with accessible pinouts. Consider the internal oscillator accuracy if external crystal resources are constrained. Evaluate the 16KB RAM limit against application stack requirements to ensure sufficient memory headroom for real-time operations.

Part Context

This microcontroller belongs to the SAM D21G family, which emphasizes functional safety alongside standard performance. It shares the Cortex-M0+ core architecture with other SAM D21 variants but distinguishes itself through specific memory configurations and safety-oriented design guidelines. The G-series designation typically indicates specific pinout and feature sets optimized for cost-sensitive yet reliable embedded solutions.

Replacement Considerations

ATSAMD21G17A-AU: Identical electrical specifications and memory map; differs only in the TQFP-48 package type compared to the QFN-48 of the AU suffix. ATSAMD21J17A-AFT: Offers identical core and memory but provides additional I/O pins due to a larger 64-pin package.