ATSAML21E15B-AUT

Overview

The ATSAML21E15B-AUT is a 32-bit microcontroller based on the ARM Cortex-M0+ core, belonging to the SAML21 series designed for functional safety applications. It features 32KB of Flash memory and 4KB of SRAM, operating at a maximum clock frequency of 48MHz. The device supports a supply voltage range of 1.62V to 3.6V and includes an internal oscillator. It integrates ten 12-bit ADC channels and one 10-bit DAC. Connectivity options include I2C, LINbus, SPI, UART/USART, and USB interfaces. The component is housed in a 32-TQFP package with 26 available I/O pins and operates within a temperature range of -40°C to 85°C.

Feature Summary

• Functional Safety (FuSa) design compliant with automotive safety standards
• Integrated full-speed USB device interface for communication
• Low-power operation with multiple sleep modes and efficient power management
• Rich analog peripheral set including high-resolution ADCs and DAC

Applications

• Automotive body electronics and lighting control systems
• Industrial sensor nodes requiring functional safety compliance
• Consumer devices with USB connectivity requirements
• Battery-powered IoT endpoints needing low power consumption

Procurement Notes

Verify the specific suffix AUT indicates automotive grade qualification and functional safety compliance when sourcing. Confirm the package type matches the target PCB footprint, as variations exist within the SAM D21/L21 families. Ensure the revision level aligns with the design's silicon errata sheet. Cross-reference the manufacturer's official datasheet for the complete pinout and electrical characteristics before finalizing procurement specifications.

Selection Notes

Select this component when functional safety certification is required for embedded applications. Compare against standard SAMD21 variants if automotive qualification is unnecessary, as those may offer different cost structures. Evaluate the 32KB Flash size against application code requirements; larger memory options are available in the same family. Consider the TQFP-32 package constraints regarding pin count and thermal dissipation for the specific enclosure design.

Part Context

This part belongs to the Microchip SAM L21 family, which extends the popular SAM D21 architecture with enhanced security and functional safety features. The 'L' designation typically implies Low Power optimizations compared to the base D21 series. The E15 variant specifies the memory configuration and pin count within this lineup. This family targets markets demanding reliability and safety integrity levels beyond standard consumer electronics.

Replacement Considerations

ATSAMD21E15B-AUT serves as a direct predecessor or alternative depending on specific safety certification needs. ATSAML21G17B-AUT offers higher memory but requires package adaptation. Standard SAMD21E15B lacks the AUT automotive qualification suffix.