ATSAML21G18B-MNT

Overview

The ATSAML21G18B-MNT is a low-power, 32-bit ARM Cortex-M0+ microcontroller from the SAML21 series. It features 256 kB of Flash memory and 32 kB of SRAM. The device operates with a maximum clock frequency of 48 MHz and supports an input/output count of 51 pins. It includes advanced analog peripherals such as a 12-bit ADC with 20 channels and a 12-bit DAC. The unit is housed in a VQFN-64 package and functions within a supply voltage range of 1.62 V to 3.63 V.

Feature Summary

• Integrates an ARM Cortex-M0+ core for efficient code execution and low power consumption.
• Includes advanced analog capabilities with high-resolution ADC and DAC modules.
• Supports multiple communication interfaces including USB, SPI, I2C, USART, and LIN.
• Features DMA controller for efficient data transfer management without CPU intervention.

Applications

• Battery-powered wearable devices requiring extended operational life.
• Industrial control systems utilizing LIN bus communication.
• Smart home appliances with USB connectivity requirements.
• Portable medical equipment needing precise analog signal acquisition.

Procurement Notes

Verify the specific suffix MNT against official Microchip documentation to confirm the reel packaging configuration and moisture sensitivity level. Ensure the order matches the exact temperature grade and pinout specifications required by the design. Cross-reference the datasheet revision to confirm peripheral availability and electrical characteristics before finalizing procurement.

Selection Notes

Select this component when a balance of moderate memory capacity and extensive analog connectivity is required in a compact form factor. The VQFN-64 package suits space-constrained designs. Consider the 48 MHz performance limit and 1.62 V minimum operating voltage during system architecture planning. Evaluate the 51 I/O count against interface requirements to ensure sufficient pin availability.

Part Context

This microcontroller belongs to the SAML21 family, which targets applications demanding low power operation alongside rich peripheral sets. The series integrates security features and advanced analog blocks suitable for sensor-rich environments. It serves as a solution for designers migrating from 8-bit or 16-bit architectures to 32-bit ARM cores while maintaining cost efficiency.

Replacement Considerations

ATSAMD21G18B-MNT shares similar core specifications but lacks the specific security features of the SAML21 series. ATSAML21J18B-MNT offers increased I/O count in a different package. Verify pin compatibility and peripheral mapping before substituting any alternative part numbers.