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ATSAMD20J17A-AU

MCHPATSAMD20J17A-AU

Microchip Technology
ARM Microcontrollers - MCU Cortex-M0+ 128KB FLASH 16KB SRAM
5,471 in stock

Overview

The ATSAMD20J17A-AU is a Microchip SAM D20 family microcontroller based on an ARM Cortex-M0+ core. It combines 128 KB of flash with 16 KB of SRAM in a 64-pin TQFP package, making it a fit for compact embedded designs that need modest memory and flexible peripherals. It is commonly used as a general-purpose MCU for control, communication, and low-power interface tasks.

Why Choose This Part

This part gives you a modern ARM Cortex-M0+ core with enough flash and SRAM for many small embedded applications while staying in a compact package. The SAM D20 family is well suited to designs that need a balance of low power, peripheral mix, and straightforward firmware development. It is also a practical fit when you want more capability than an 8-bit MCU without moving to a larger, more complex device.

Applications

General-purpose embedded control
Useful for small controllers that manage sensors, buttons, relays, or state machines.
USB-connected peripherals
A practical choice for simple USB devices, adapters, and interface widgets that need a small ARM MCU.
Low-power IoT endpoints
Appropriate for battery-oriented nodes that spend most of their time sleeping and wake for periodic tasks.
Prototyping and education
Good for learning ARM Cortex-M development, peripheral bring-up, and firmware workflow on a low-cost MCU.
Custom human-machine interfaces
Can handle basic key scanning, LEDs, and simple display or control interfaces in compact products.

Getting Started

A common starting point is a Microchip SAM D20 Xplained Pro board or another SAM D20 evaluation board, which gives you a known-good hardware reference and a simple path to programming. Use Microchip Studio or MPLAB X with the Arm GNU toolchain, and make sure your programming/debug connection matches the board's SWD header. For first bring-up, verify clocking, reset, and SWD access before enabling complex peripherals.

ATSAMD20J Family

Part NumberDifferenceStock
ATSAMD20J18A-MUT QFN-64 · 256KB Flash 12,972

Also Consider

ATSAMD21G18A-AU MCHPMicrochip Technology - A closely related SAM D21 option with a similar ARM Cortex-M0+ feature set for designs that need a different SAM D20/SAM D21 tradeoff.
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