ATSAML21J18A-MUT

Overview

The ATSAML21J18A-MUT is a Microchip Technology microcontroller from the SAM L21 series, featuring an ARM Cortex-M0+ processor with a maximum clock frequency of 48 MHz. It includes 256 KB of in-system programmable Flash memory and 32 KB of SRAM. The device operates within a voltage range of 1.62 V to 3.63 V and supports up to 51 programmable I/O pins. It is housed in a 64-pin QFN package.

Feature Summary

• Ultra-low-power architecture with multiple sleep modes and power domain gating
• Integrated touch controller supporting capacitive interfaces and proximity sensing
• Comprehensive peripheral set including USB 2.0, ADC, DAC, and SERCOM modules
• Hardware security features such as AES encryption and True Random Generator

Applications

• Battery-powered wearable devices requiring low current consumption
• Industrial control systems utilizing motor control timers
• Smart home sensors with capacitive touch user interfaces
• Portable medical equipment needing secure data handling

Procurement Notes

Verify the specific ordering code against official Microchip documentation to ensure correct package type and temperature grade. Confirm that the 'A' variant designation matches your functional requirements, as it may differ from the standard 'B' production release. Cross-reference pinouts and memory configurations with the latest datasheet before finalizing procurement orders.

Selection Notes

Select this component for applications requiring high integration in a compact 64-pin form factor. The Cortex-M0+ core offers efficient processing for low-power tasks. Ensure the design accommodates the 1.62V to 3.63V supply range and utilizes the available GPIOs for required peripherals like USB or touch sensing.

Part Context

This part belongs to the SAM L21 family of ultra-low-power microcontrollers. It shares architectural similarities with other SAM L21 variants but is distinguished by its specific memory size and package configuration. The family emphasizes ease of migration and pin compatibility across different memory densities.

Replacement Considerations

ATSAML21J18B-MUT