MCHPATSAMD21J18A-AZVAO
Overview
The ATSAMD21J18A-AZVAO is a Microchip ARM Cortex-M0+ microcontroller from the SAM D21 family. It is intended for low-power embedded control and general-purpose connected devices, with a 32-bit CPU and a 1.6 V to 3.6 V operating range. The J-package gives you a larger pin count than the smaller SAMD21 variants, which is useful when you need more I/O and peripheral routing on a compact MCU.
Why Choose This Part
This part is a practical choice when you want a 32-bit MCU with enough performance for control and communication tasks, but without moving to a more complex application processor. The SAMD21 family is well supported by vendor tools and a large Arduino-compatible ecosystem, which can reduce bring-up time. The higher-pin-count J package is useful when you need more GPIO or peripheral options than smaller packages provide.
Applications
Getting Started
A common starting point is a SAMD21-based development board such as the Arduino Zero or a Microchip Xplained Pro board, which gives you a known-good clock, power, and programming setup. For development, use Microchip Studio or the Arduino IDE with the SAMD core, depending on whether you want a bare-metal or higher-level workflow. For production designs, pay close attention to USB layout, decoupling, reset/boot wiring, and the selected debug/programming interface.
Dev Boards
Development boards and breakout modules featuring the ATSAMD21J18A-AZVAO or compatible chips — ready to use for prototyping.
SAMD21J Family
| Part Number | Difference | Stock |
|---|---|---|
| ATSAMD21J18A-AFT | TQFP-64 · 256KB Flash | 15,486 |
| ATSAMD21J17D-AZVAO | 7D-AZVAO | 295 |
| ATSAMD21J17D-MZVAO | 7D-MZVAO | 240 |
| ATSAMD21J16B-AZVAO | 6B-AZVAO | 319 |
| ATSAMD21J18A-MUT | QFN (tape) | 13,536 |
| ATSAMD21J15B-MFT | 5B-MFT | 10,941 |
Also Consider
STMicroelectronics
- A widely used 32-bit MCU alternative for general embedded control when you want a different vendor ecosystem.
