ATSAMD21J16B-AU

Overview

The ATSAMD21J16B-AU is a 32-bit microcontroller based on the ARM Cortex-M0+ core, belonging to the SAM D21 series with Functional Safety (FuSa) certification. It features 64KB of flash memory and 8KB of SRAM, operating at a maximum frequency of 48MHz. The device supports a supply voltage range of 1.62V to 3.6V and includes an internal oscillator. Connectivity options include I2C, LINbus, SPI, USART, and USB interfaces. It provides 52 I/O pins and integrates peripherals such as DMA, I2S, PWM, and watchdog timers within a 64-TQFP package.

Feature Summary

• Functional Safety (FuSa) certified for automotive applications
• Integrated advanced analog peripherals including ADC and DAC
• Supports multiple communication protocols via SERCOM modules
• Low-power operation with flexible clocking sources

Applications

• Automotive body electronics and control modules
• Industrial automation controllers
• Consumer devices requiring functional safety compliance
• IoT gateways and edge nodes

Procurement Notes

Verify the specific suffix 'AU' corresponds to the 64-TQFP package and commercial temperature range (-40°C to 85°C). Confirm that the FuSa qualification status meets your system's safety integrity level requirements. Check for any recent Product Change Notifications regarding assembly sites or labeling changes. Ensure compatibility with your chosen development tools and debuggers for the SAM D21 family.

Selection Notes

Select this component when functional safety certification is mandatory for the application. Compare pin counts and peripheral availability against other SAM D21 variants like the G or E series if fewer I/Os are sufficient. Consider the 64-TQFP package constraints for PCB layout. Evaluate power consumption profiles against alternative MCUs if ultra-low standby current is critical.

Part Context

This part is part of Microchip's SAM D21 family, designed for cost-sensitive applications requiring robust performance and safety features. It shares architectural similarities with other Cortex-M0+ MCUs but distinguishes itself through its specific FuSa certification and integrated analog capabilities. The J-series typically offers higher pin counts compared to smaller packages in the same family.

Replacement Considerations

Direct substitutes may include other SAM D21 variants with similar memory and package configurations, such as ATSAMD21J17B-AU for increased storage. Cross-family replacements require careful evaluation of pin compatibility and peripheral mapping.