ATSAMD21G17D-AF

Overview

The ATSAMD21G17D-AF is a 32-bit microcontroller based on the ARM Cortex-M0+ core, belonging to the SAM D21G Functional Safety (FuSa) series. It features 128KB of in-system programmable Flash memory and 16KB of SRAM. The device operates at a maximum frequency of 48MHz with an internal oscillator. It supports a supply voltage range of 1.62V to 3.63V and includes 38 general-purpose I/O pins. Connectivity options include USB, I2C, SPI, UART/USART, and LINbus interfaces. Analog capabilities consist of 14-channel 12-bit ADCs and one 10-bit DAC. Peripherals include DMA, I2S, PWM, WDT, and power-on reset. The component is housed in a 48-TQFP package and rated for industrial temperatures from -40°C to 85°C.

Feature Summary

• Integrated Functional Safety (FuSa) design compliant with ISO 26262 standards for automotive applications.
• Includes hardware security features such as Read-Out Protection (ROP), Write-Protection (WRP), and JTAG lock bits.
• Features advanced analog peripherals including multiple 12-bit ADCs and a 10-bit DAC for signal processing.

Applications

• Automotive body electronics and infotainment systems requiring functional safety certification.
• Industrial control systems utilizing LINbus communication protocols.
• Battery management systems and sensor interfaces leveraging high-resolution analog-to-digital conversion.

Procurement Notes

Verify the specific suffix 'AF' against official Microchip documentation to confirm the package type and temperature grade, as distributor listings may vary. Ensure compatibility with required functional safety integrity levels for your application. Cross-reference the datasheet revision date to account for any errata or specification updates prior to final procurement decisions.

Selection Notes

Select this model when both 128KB program memory and automotive-grade functional safety compliance are required. Compare against the ATSAMD21G17D-AU variant if a TQFP package is preferred over the AF designation's specific form factor. Consider the ATSAMD21G17L-MNT if extended temperature ranges beyond standard industrial limits are necessary for the deployment environment.

Part Context

This component is part of the SAM D21G family, which extends the standard SAM D21 line with enhanced safety features. It shares the Cortex-M0+ architecture with other SAM D21 variants but distinguishes itself through FuSa qualification. The device targets markets demanding reliability and diagnostic coverage, serving as a bridge between standard commercial MCUs and higher-cost safety-critical processors.

Replacement Considerations

The ATSAMD21G17D-AU is a pin-compatible alternative within the same series offering identical specifications in a TQFP package. Verify that the specific 'AF' suffix does not denote a unique package variation distinct from standard TQFP offerings before substitution.