MCHPATSAMD51J19A-MF

Overview

The ATSAMD51J19A-MF is a Microchip ARM Cortex-M4 microcontroller for embedded control and connected devices. It combines a 32-bit MCU core with on-chip Flash, USB support, and an extended-temperature operating range in a 64-pin QFN package. This part is suited to designs that need more performance than a basic 8-bit MCU without moving to a full application processor.

Why Choose This Part

The Cortex-M4 core gives this MCU solid headroom for firmware that needs deterministic control plus moderate compute performance. The 64-pin QFN package helps keep layouts compact while still offering useful I/O density, and the extended-temperature rating broadens deployment options. Native USB support is also a practical advantage for devices that need direct host connectivity or easy firmware updates.

Applications

Getting Started

Start with a Microchip SAMD51 development board or a third-party board based on this MCU, then use Microchip's MPLAB X IDE and the XC32 toolchain or Arduino support if your board ecosystem provides it. For low-level bring-up, verify the clock tree, flash programming method, and pin multiplexing early in the design. The ATSAMD51 family is widely used with debugger/programmer tools that support SWD, so plan for a header or footprint that makes in-circuit programming straightforward.

Dev Boards

Development boards and breakout modules featuring the ATSAMD51J19A-MF 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

Digi-Key

Adafruit Metro M4 (ATSAMD51) Adafruit

Development Boards & Kits - ARM Metro M4 feat. Microchip ATSAMD51

Mouser 73 in stock

Adafruit Grand Central M4 Express Adafruit

Development Boards & Kits - ARM Adafruit Grand Central M4 Express featuring the SAMD51

Mouser 116 in stock

ATSAMD51J Family

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

Also Consider

STM32F405RGT6 STMicroelectronics - A popular Cortex-M4 alternative with broad ecosystem support for embedded control and USB-capable designs.

STM32F411CEU6 STMicroelectronics - A compact Cortex-M4 option often used in USB and control-oriented designs when a different STM32 ecosystem is preferred.

RP2040 Raspberry Pi - A lower-cost dual-core MCU alternative for USB-connected embedded projects and prototyping, depending on the needed peripheral mix.

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