ATSAMD21G17A-AF

Overview

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

Feature Summary

• Integrates Functional Safety (FuSa) design support within the SAM D21G series architecture.
• Provides full-speed USB device connectivity with integrated transceiver.
• Includes Direct Memory Access (DMA) controller for efficient data transfer management.
• Features comprehensive analog peripherals including multi-channel ADC and DAC.

Applications

• Industrial control systems requiring functional safety compliance
• USB-enabled peripheral devices and human interface devices
• Low-power embedded applications with battery operation constraints
• Smart sensors utilizing analog signal processing capabilities

Procurement Notes

Verify the specific suffix AF indicates the extended temperature range and lead-free composition as documented by Microchip Technology. Confirm package integrity for the 48-TQFP form factor during inspection. Ensure compatibility with existing firmware binaries targeting the SAM D21G family. Cross-reference official datasheets for pinout definitions and electrical characteristics prior to integration.

Selection Notes

Select this component when 128 KB of program storage and 16 KB of RAM are required alongside functional safety features. Choose the 48-TQFP package for surface-mount assembly needs. Consider this part over variants with different memory sizes or package types if the specific I/O count and interface set match the design requirements. Verify thermal performance within the specified operating temperature range.

Part Context

This MCU belongs to the SAM D21G series, which emphasizes functional safety capabilities alongside standard microcontroller functions. The series utilizes the ARM Cortex-M0+ processor for energy-efficient execution. The ATSAMD21G17A-AF variant specifically denotes the 128 KB Flash configuration in the 48-lead TQFP package with automotive-grade temperature specifications.

Replacement Considerations

ATSAMD21G17A-AU shares identical core specifications but differs in package type. ATSAMD21J17A-AFT offers similar functionality in a 64-lead QFP package. Verify pin compatibility and software migration paths when substituting these related parts from the SAM D21 family.