ATSAMD21G18A-MU

Overview

The ATSAMD21G18A-MU is a 32-bit microcontroller based on the ARM Cortex-M0+ core, operating at a maximum frequency of 48 MHz. It features 256 kB of Flash program memory and 32 kB of SRAM data memory. The device operates within a supply voltage range of 1.62 V to 3.6 V and supports an industrial temperature range from -40°C to +85°C. It integrates multiple communication interfaces including SPI, UART/USART, I2C, USB, and I2S. The component is housed in a 48-pin QFN package with exposed pad.

Feature Summary

• Integrates a 32-bit ARM Cortex-M0+ processor for efficient code execution
• Includes advanced analog peripherals such as high-resolution ADCs and DACs
• Supports comprehensive connectivity via USB, SPI, I2C, USART, and I2S interfaces
• Features low-power operation modes suitable for battery-constrained applications

Applications

• IoT edge nodes requiring sensor data aggregation and protocol handling
• Industrial control systems utilizing LINbus or standard serial interfaces
• Portable devices powered by single-cell lithium batteries
• Audio applications leveraging I2S peripheral support

Procurement Notes

Verify the specific suffix 'MU' corresponds to the 48-pin QFN package and commercial temperature grade during sourcing. Confirm RoHS compliance status through official Microchip documentation. Ensure ESD protection measures are implemented during handling due to moisture sensitivity classification. Cross-reference datasheet revisions to confirm pinout compatibility with existing designs.

Selection Notes

Select this component when a balance of processing power and energy efficiency is required for embedded applications. The Cortex-M0+ architecture offers sufficient performance for real-time control tasks while maintaining low active current consumption. Consider the available GPIO count and peripheral set against system interface requirements before finalizing the design.

Part Context

This part belongs to the SAM D21 family of microcontrollers, which are designed for low-power, cost-sensitive applications. The family shares architectural similarities with other SAM D series devices but offers specific memory configurations and peripheral sets tailored for general-purpose embedded control and wireless connectivity solutions.

FAQ

What is the maximum operating frequency of the ATSAMD21G18A-MU?

The maximum CPU clock frequency is 48 MHz.

Does the ATSAMD21G18A-MU include a hardware USB controller?

Yes, the device includes a full-speed USB device interface.