ATSAMD21J15B-AF

Overview

The ATSAMD21J15B-AF is a 32-bit microcontroller based on the ARM Cortex-M0+ core, belonging to the SAM D21J series with Functional Safety (FuSa) certification. It features 32KB of Flash program memory and 4KB of SRAM. The device operates at a maximum clock speed of 48MHz and supports a supply voltage range of 1.62V to 3.63V. It includes 20-channel 12-bit ADCs and one 10-bit DAC. Connectivity interfaces include I2C, LINbus, SPI, USART, and USB. The component is housed in a 64-TQFP package and is qualified under AEC-Q100 standards for automotive applications, operating within a temperature range of -40°C to +125°C.

Feature Summary

• AEC-Q100 qualified for automotive reliability requirements
• Functional Safety (FuSa) compliant design architecture
• Integrated full-speed USB device interface
• High-resolution analog conversion capabilities

Applications

• Automotive body control modules
• Industrial sensor nodes requiring safety compliance
• Consumer electronics with USB connectivity
• General-purpose embedded control systems

Procurement Notes

Verify the specific suffix 'AF' confirms the 64-TQFP package and extended temperature range up to 125°C. Ensure compatibility with existing PCB footprints for TQFP-64 components. Confirm that the Functional Safety qualification meets the specific integrity level required for your application. Check for any recent Product Change Notifications regarding assembly sites or packaging materials.

Selection Notes

Select this model when automotive qualification and functional safety are mandatory constraints. The 64-TQFP package offers higher pin count compared to QFN variants, facilitating complex interconnects. Consider the 48MHz performance limit against processing demands. Evaluate if the 32KB Flash capacity suffices for firmware size. Compare against other SAM D21J variants if different pin counts or memory sizes are needed.

Part Context

This part belongs to the Microchip SAM D21 family, designed for low-power, high-performance applications. The 'J' designation indicates a specific pin count and peripheral set within the series. The 'B' suffix typically denotes a specific revision or feature set, while 'AF' specifies the automotive-grade temperature range and TQFP packaging. It complements non-automotive variants like the MUT or AU models.

Replacement Considerations

ATSAMD21J15B-MUT: Same core and memory but in 64-QFN package and 85°C temp range. ATSAMD21J15B-AU: Same core and memory but in 64-TQFP package and 85°C temp range. Verify package dimensions and thermal characteristics before substitution.