ATmega328P Developer Atmel Operating voltage 1.8V to 5.5V Max Operating frequency 20 MHz Temp. range -40°C to 85°C CPUs Data bus width 8-bit Core AVR FPU No Pins Pin count 32 Max I/O Pins 23 Memory Flash 32KB SRAM 2KB EEPROM 1024B Packaging Package PDIP-28, VQFN-28, QFN-32, TQFP-32, MLF-32 Mounting SMD/SMT, Through Hole

The ATmega328P is an 8-bit, 32KB Flash, microcontroller, part of the megaAVR MCUs series, developed by Atmel. The microcontroller provides a delicate balance between performance and balance. This is the picoPower version of the standard ATmega328 version which alows it to operate under lower voltage and power requirements, as low as 1.62V. The microcontroller came into public notability when it was selected to be the microcontroller of choice in the Arduino single-board microcontroller.

Models

The ATMEGA328P-PU - The ATmega 328 in a 28-pin plastic dual-in-line package.

Model Code	Package	Terminal Count
ATMEGA328P-AU	TQFP	32
ATMEGA328P-AUR	TQFP	32
ATMEGA328P-AN	TQFP	32
ATMEGA328P-MU	MLF	32
ATMEGA328-MUR	MLF	32
ATMEGA328P-MMH	VQFN	28
ATMEGA328P-PU	PDIP	28
ATMEGA328P-PN	PDIP	28