ATSAMD21J17D-CU

Overview

The ATSAMD21J17D-CU 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 operates within a supply voltage range of 1.62V to 3.63V and supports an industrial temperature range of -40°C to +85°C. Connectivity includes USB, SPI, I2C, UART/USART, LINbus, and I2S interfaces. It provides 52 general-purpose I/Os and integrates multiple peripherals such as DMA, PWM, and watchdog timers.

Feature Summary

• Integrated Functional Safety (FuSa) capabilities for safety-critical applications
• AEC-Q100 qualified for automotive reliability standards
• Supports internal oscillator with flexible clock management
• Includes analog-to-digital converters and a digital-to-analog converter

Applications

• Automotive infotainment systems
• Industrial control units requiring functional safety
• Consumer electronics with USB connectivity
• Smart home devices and IoT nodes

Procurement Notes

Verify the specific package type, which is 64-UFBGA (5x5), against your PCB footprint requirements. Confirm that the industrial temperature grade (-40°C to +85°C) meets your environmental specifications. Ensure compatibility with the SAM D21 family development tools. Check for any recent Product Change Notifications regarding packaging or assembly sites. Validate RoHS compliance status for your region's regulatory needs.

Selection Notes

Select this component when AEC-Q100 qualification and Functional Safety support are mandatory. Choose the UFBGA-64 package if space constraints favor a compact surface-mount solution over TQFP or QFN alternatives. Consider the 128KB flash size for complex firmware requirements. Evaluate the 48MHz performance limit against processing demands. Verify that the 1.62V minimum voltage aligns with your power domain design.

Part Context

This part belongs to the Microchip SAM D21J series, designed specifically for automotive and industrial markets. It shares the core architecture with other SAM D21 variants but distinguishes itself through its automotive qualification and functional safety features. The 'CU' suffix denotes the 64-UFBGA package variant. It complements the broader SAM D21 family by offering robustness for harsh environments.

Replacement Considerations

ATSAMD21J17D-AU offers identical functionality in a 64-TQFP package. ATSAMD21J17D-MFT provides the same core in a 64-QFN package. These parts are pin-compatible within their respective package families but require different footprints. Verify that the alternative package suits your manufacturing process.