ATMEGA328P in ATmega Family
The ATmega328P is a high-performance, low-power 8-bit RISC-based microcontroller from Microchip Technology (formerly Atmel). Renowned for its integration in the Arduino Uno platform, it features 32KB of ISP flash memory, 2KB of SRAM, and 1KB of EEPROM. Operating between 1.8V and 5.5V, it achieves throughputs approaching 1 MIPS per MHz. It is a staple in the embedded industry for low-complexity control tasks where power efficiency, cost-effectiveness, and a massive community-driven library ecosystem are primary design considerations.
Variants in This Sub-Family
Comparing specs that differ across variants.
| Part Number | I/O Pins | Stock |
|---|---|---|
| ATmega328P (Microchip Technology) | 27 | 13,074 |
| ATMEGA328P-MU (Microchip Technology) | 23 | 5,629 |
Variants of the ATmega328P primarily differ by package type and environmental grading. The -PU suffix denotes the 28-pin PDIP package, ideal for through-hole prototyping. The -AU and -MU variants offer TQFP and QFN/MLF footprints respectively, providing significantly smaller PCB surface area for space-constrained surface-mount designs. Performance characteristics like 20MHz maximum clock speed and 1.8V-5.5V voltage range remain consistent across these electrical variants, though tape-and-reel options (-AUR) are available for high-volume manufacturing.
