ATSAML21E16B-MUT

Overview

The ATSAML21E16B-MUT is a 32-bit microcontroller from the SAM L21 series, featuring an ARM Cortex-M0+ processor running at up to 48MHz. It integrates 64KB of in-system programmable Flash memory and 8KB of main SRAM. The device operates within a voltage range of 1.62V to 3.63V and supports an industrial temperature range of -40°C to +85°C. It is housed in a 32-pin QFN package with 25 available GPIOs.

Feature Summary

• Ultra-low-power architecture with SleepWalking capabilities for peripheral-driven wake-up
• Integrated full-speed USB 2.0 interface supporting embedded host and device functions
• Configurable Custom Logic (CCL) for custom digital logic implementation without CPU intervention
• Peripheral Touch Controller supporting capacitive sensing and proximity detection

Applications

• Battery-powered wearable devices requiring low standby current
• USB-enabled consumer electronics and peripherals
• Industrial control systems utilizing capacitive touch interfaces
• Smart home appliances with event-driven operation modes

Procurement Notes

Verify the specific ordering code against the manufacturer's official documentation to ensure correct package type and temperature grade. Confirm that the 'M' suffix corresponds to the QFN package and 'U' indicates the specified operating temperature range. Cross-reference the device identification register values if software compatibility with other SAM L21 variants is required.

Selection Notes

Select this component when a balance of moderate Flash capacity and ultra-low power consumption is needed. The SAM L21E variant offers pin compatibility with other E-series devices for migration purposes. Ensure design requirements align with the 48MHz maximum clock speed and the specific peripheral count available in the 32-pin configuration.

Part Context

This part belongs to the SMART SAM L21 family of microcontrollers designed for ultra-low-power applications. It shares architectural similarities with the SAM D21 series but adds advanced power management features like SleepWalking and dynamic power gating. The E-series specifically targets cost-sensitive applications with fewer I/O pins compared to the G and J series.

Replacement Considerations

ATSAML21E16B-AUT provides the same functional specifications in a TQFP-32 package instead of QFN.