ATMEGA644PA in ATmega Family
The ATMEGA644PA is a high-performance, low-power 8-bit microcontroller family based on the Microchip (formerly Atmel) AVR RISC architecture. Specifically designed for applications requiring more program space and I/O than the standard ATmega328P, it features 64KB of Flash memory and extensive peripheral support. It operates efficiently within a wide voltage range and utilizes picoPower technology to minimize power consumption in sleep modes, making it a staple for battery-operated industrial and consumer embedded systems.
Variants in This Sub-Family
Comparing specs that differ across variants.
| Part Number | Package | Stock |
|---|---|---|
| ATMEGA644PA-PU (Microchip Technology) | DIP-40 | 1,041 |
| ATMEGA644PA-AU (Microchip Technology) | TQFP-44 | 1,042 |
| ATMEGA644PA-MU (Microchip Technology) | VFQFN-44 | 619 |
The sub-family variants primarily differ in their physical packaging and thermal ratings. The 'PU' suffix denotes a 40-pin Plastic Dual In-line Package (PDIP), which is favored for prototyping and through-hole assembly. The 'AU' variant comes in a 44-lead Thin Profile Plastic Quad Flat Package (TQFP) for surface mount applications, while the 'MU' variant utilizes a 44-pad Very Thin Quad Flat No-Lead (VQFN) package for space-constrained PCB layouts.
