MCHPATSAMD20J17A-AU
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
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 Number | Difference | Stock |
|---|---|---|
| ATSAMD20J18A-MUT | QFN-64 · 256KB Flash | 12,972 |



