EmbeddedRelated.com
The 2026 Embedded Online Conference
ATSAMD51G19A-MU

MCHPATSAMD51G19A-MU

Microchip Technology
ARM® Cortex®-M4F SAM D51 Microcontroller IC 32-Bit 120MHz 512KB (512K x 8) FLASH 48-QFN (7x7)
Active867 in stock

Overview

The ATSAMD51G19A-MU is a high-performance 32-bit microcontroller based on the ARM Cortex-M4F core with a floating-point unit (FPU). Operating at speeds up to 120MHz, this device features 512KB of Flash and 192KB of RAM, making it suitable for complex processing tasks in a compact 48-VFQFN package. It includes a robust set of peripherals such as dual 12-bit DACs, twenty 12-bit ADC channels, and extensive connectivity options like QSPI and USB.

Why Choose This Part

This MCU offers a compelling balance of high-speed processing and advanced analog integration, featuring a built-in FPU for efficient mathematical operations. The inclusion of 192KB of RAM allows for large data buffers and RTOS-based applications without the need for external memory in many designs.

Applications

Digital Signal Processing
Utilizes the integrated FPU and 120MHz clock speed for real-time sensor data filtering and signal analysis.
Industrial Gateway Controllers
Leverages multiple serial interfaces including UART, LINbus, and I2C to bridge legacy industrial equipment with modern networks.
High-Resolution Analog Sensing
Employs the 20-channel 12-bit ADC and dual 12-bit DACs for precise measurement and control in instrumentation.
Human Machine Interface (HMI)
Drives small displays and handles user input via dedicated QSPI for external memory and flexible PWM for haptics or backlighting.

Key Specifications

Speed 120MHz
RAM Size 192K x 8
Core Size 32-Bit
Peripherals Brown-out Detect/Reset, DMA, I2S, POR, PWM
Connectivity EBI/EMI, I2C, IrDA, LINbus, MMC/SD, QSPI, SPI, UART/USART, USB
Mounting Type Surface Mount
Number of I/O 37
Core Processor ARM Cortex-M4F
Package / Case 48-VFQFN Exposed Pad
Data Converters A/D 20x12b; D/A 2x12b
Oscillator Type Internal
Program Memory Size 512KB (512K x 8)
Program Memory Type FLASH
Operating Temperature -40degC ~ 85degC (TA)
Supplier Device Package 48-QFN (7x7)
Voltage - Supply (Vcc/Vdd) 1.71V ~ 3.63V

Getting Started

Development is primarily supported through Microchip Studio and the MPLAB X IDE using the Harmony v3 framework for driver configuration. For hardware prototyping, the SAM D51 Curiosity Nano or various Adafruit M4-series boards provide a ready-made platform, while debugging can be performed via standard SWD interfaces using an Atmel-ICE or J-Link.

Dev Boards

Development boards and breakout modules featuring the ATSAMD51G19A-MU or compatible chips — ready to use for prototyping.

Adafruit Feather M4 Express Adafruit Industries LLC
ATSAMD51J19 Feather M4 Express SAM D ARM® Cortex®-M4 MCU 32-Bit Embedded Evaluation Board
Digi-Key 239 in stock
Adafruit Metro M4 Express AirLift Adafruit Industries LLC
ATSAMD51 Metro M4 Express AirLift SAM D ARM® Cortex®-M4 MCU 32-Bit Embedded Evaluation Board
Digi-Key 34 in stock
Adafruit HalloWing M4 Express Adafruit Industries LLC
ATSAMD51G18 HalloWing M4 Express SAM D ARM® Cortex®-M4 MCU 32-Bit Embedded Evaluation Board
Development Boards & Kits - ARM Metro M4 feat. Microchip ATSAMD51
Mouser 73 in stock
Development Boards & Kits - ARM Adafruit Grand Central M4 Express featuring the SAMD51
Mouser 116 in stock

Also Consider

ATSAMD51J19A-MU MCHPMicrochip Technology - Offers the same 512KB Flash and 120MHz performance but in a 64-pin package for designs requiring more I/O pins.
STM32F411CEU6 STMicroelectronics - An alternative ARM Cortex-M4F MCU with 512KB Flash in a similar 48-pin package, common in the ecosystem.
ATSAMD21G18A-MU MCHPMicrochip Technology - A lower-power, lower-cost Cortex-M0+ alternative if the 120MHz speed and FPU of the D51 are not required.
The 2026 Embedded Online Conference