Parts Microcontrollers Microchip SAM Microcontrollers Family SAMD21G ATSAMD21G18A-MF

MCHPATSAMD21G18A-MF

Name: ATSAMD21G18A-MF
Brand: Microchip Technology

Microchip Technology

ARM Microcontrollers - MCU 48QFN 125C, GREEN,1.6-3.6V,48MHz

14,197 in stock

Datasheet Digi-Key Mouser Compare Prices

Overview

The ATSAMD21G18A-MF is a low-power, high-performance ARM Cortex-M0+ based microcontroller featuring 256KB of Flash and 32KB of SRAM. Operating at up to 48MHz, it includes a Full-Speed USB 2.0 interface and a Peripheral Touch Controller (PTC) for capacitive touch applications. This 48-pin QFN variant is designed for high-density designs requiring a balance of processing power and power efficiency.

Why Choose This Part

This MCU offers a highly flexible SERCOM (Serial Communication Interface) that can be configured as I2C, SPI, or USART across six separate modules. It simplifies system design by providing a wide operating voltage of 1.62V to 3.63V and an integrated event system that allows peripherals to communicate without CPU intervention, reducing power consumption and latency.

Applications

Consumer Touch Interfaces

Utilizing the integrated Peripheral Touch Controller (PTC) to implement buttons, sliders, and wheels without external sensors.

USB Peripherals

Developing bus-powered USB devices like keyboards, mice, or custom MIDI controllers using the internal Full-Speed USB 12Mbps engine.

Battery-Powered Wearables

Leveraging the energy-efficient Cortex-M0+ core and flexible sleep modes to extend battery life in small-form-factor devices.

Industrial Sensor Nodes

Collecting and processing analog data via 14 ADC channels and 12 DMA channels for efficient background data handling.

Getting Started

Developers can use Microchip Studio or MPLAB X IDE alongside the XC32 compiler for development. The Atmel-ICE or Power Debugger are the recommended hardware tools for programming and debugging via the Serial Wire Debug (SWD) interface. For rapid prototyping, the SAM D21 Xplained Pro evaluation kit provides a ready-to-use platform with header access to all IOs.

Dev Boards

Development boards and breakout modules featuring the ATSAMD21G18A-MF or compatible chips — ready to use for prototyping.

Seeed Studio XIAO SAMD21 Seeed Technology Co., Ltd

ATSAMD21G18 XIAO SAMD21 SAM D ARM® Cortex®-M0 MCU 32-Bit Embedded Evaluation Board

Digi-Key 509 in stock

Seeed Studio XIAO SAMD21 Seeed Technology Co., Ltd

ATSAMD21G18 XIAO SAMD21 SAM D ARM® Cortex®-M0+ MCU 32-Bit Embedded Evaluation Board

Digi-Key 3,829 in stock

Adafruit Feather M0 Express Adafruit Industries LLC

ATSAMD21G18 Feather M0 Express SAM D ARM® Cortex®-M0+ MCU 32-Bit Embedded Evaluation Board

Digi-Key Mouser 55 in stock

Arduino Nano 33 IoT Arduino

The Arduino Nano 33 IoT (ABX00027) is an advanced evaluation platform designed for IoT applications, featuring the 32 bi

Digi-Key Mouser 800 in stock

ATSAMD21G18A Microchip Technology

ARM Cortex-M0+ MCU with strong Arduino and low-power application support, useful for single-core embedded designs.

Digi-Key Mouser 2,131 in stock

Part of SAM Microcontrollers family » SAMD21G

SAMD21G Family

Comparing specs that differ across variants. The current part is highlighted.

Part Number	Package	Temp Range	Stock
ATSAMD21G18A-MF (this part)	—	—	14,197
ATSAMD21G18A-AU	TQFP-48	-40degC ~ 85degC (..	8,119
ATSAMD21G18A-AUT	TQFP-48	-40degC ~ 85degC (..	2,675
ATSAMD21G18A-MU	VFQFN-48	-40degC ~ 85degC (..	1,624
ATSAMD21G18A-AFT	TQFP-48	-40degC ~ 125degC ..	26,091
ATSAMD21G18A-MUT	VFQFN-48	-40degC ~ 85degC (..	4,133
ATSAMD21G18A-MFT	VFQFN-48	-40degC ~ 125degC ..	7,468
ATSAMD21G18A-AF	TQFP-48	-40degC ~ 125degC ..	1,678

Also available as: ATSAMD21G18A-MZVAO, ATSAMD21G16B-AZVAO, ATSAMD21G17D-AZVAO

Also Consider

ATSAMD21G18A-AU MCHPMicrochip Technology - This is the 48-pin TQFP version which is easier to hand-solder or use in low-cost PCB assembly compared to the QFN package.