ATSAMD21E16B-UUT

Overview

The ATSAMD21E16B-UUT is a 32-bit ARM Cortex-M0+ microcontroller from the SAM D21E series, manufactured by Microchip Technology. It features 64 kB of Flash program memory and 8 kB of SRAM data RAM. The device operates with a maximum clock frequency of 48 MHz and supports a supply voltage range of 1.62 V to 3.63 V. It includes a 12-bit ADC with 10 channels and a 10-bit DAC. The component provides 26 I/O pins and integrates interfaces such as LIN, I2C, I2S, SPI, and USART. It is housed in a WLCSP-35 package and is qualified under AEC-Q100 standards for automotive applications.

Feature Summary

• Automotive-grade qualification compliant with AEC-Q100 standards
• Integrated advanced analog peripherals including 12-bit ADC and 10-bit DAC
• Supports multiple communication protocols including LIN, I2C, SPI, and USART
• Low-power 32-bit ARM Cortex-M0+ core architecture

Applications

• Automotive electronic control units requiring functional safety compliance
• Industrial sensor nodes utilizing LIN bus communication
• Portable devices powered by low-voltage supply rails
• Embedded systems requiring precise analog signal acquisition

Procurement Notes

Verify current availability status as this specific part number may be discontinued or subject to allocation restrictions. Confirm that the WLCSP-35 package handling requirements align with your assembly capabilities. Ensure the AEC-Q100 qualification meets your specific project reliability standards. Cross-reference the exact suffix to confirm temperature range and packaging type before ordering.

Selection Notes

Select this component when automotive qualification is mandatory alongside compact surface-mount packaging. Compare pin counts and peripheral sets against other SAM D21 variants if more I/O is required. Consider the WLCSP footprint constraints during PCB layout. Verify compatibility with existing firmware libraries for the Cortex-M0+ core and SAM D21E family.

Part Context

This MCU belongs to the SAM D21E family, which is specifically designed for functional safety (FuSa) applications within the broader SAM D21 ecosystem. It shares architectural similarities with non-E variants but includes enhanced certification for automotive environments. The E-series designation indicates adherence to stricter quality and reliability metrics compared to standard commercial grade parts.

Replacement Considerations

ATSAMD21E16B-AU: Different TQFP-32 package; verify footprint compatibility. ATSAMD21E16B-MU: Different QFN package; check pin mapping. No direct pin-to-pin replacement exists for the WLCSP-35 form factor without PCB redesign.