ATmega328P Microcontroller – DIP-28

The ATmega328P is a high-performance 8-bit AVR RISC microcontroller designed for embedded systems and digital control applications. It operates at clock speeds up to 20MHz and includes 32KB of Flash memory, 2KB SRAM, and 1KB EEPROM for program and data storage. The device integrates digital I/O, 10-bit ADC channels, timers, and multiple communication interfaces including UART, SPI, and I²C (TWI). Known as the main controller used in the Arduino Uno, the ATMega328P is ideal for automation, robotics, sensor systems, and educational embedded projects.

Features

- 8-bit AVR RISC architecture

- Clock speed up to 20MHz

- 32KB Flash program memory

- 2KB SRAM and 1KB EEPROM

- 23 programmable I/O pins

- 6-channel 10-bit ADC

- Built-in PWM outputs

- Three timer/counters

- UART, SPI, and I²C communication support

- Multiple low-power sleep modes

- Watchdog timer for system reliability

- Internal and external clock support

- Wide operating voltage range (1.8V to 5.5V)

- Breadboard-friendly 28-pin DIP package

Specifications

- Model: ATMega328P

- Microcontroller Core: 8-bit AVR RISC

- Maximum Clock Frequency: 20MHz

- Flash Memory: 32KB

- SRAM: 2KB

- EEPROM: 1KB

- ADC Resolution: 10-bit

- Number of ADC Channels: 6

- Digital I/O Pins: 23

- PWM Channels: 6

- Communication Interfaces: UART, SPI, I²C (TWI)

- Timers: 2 × 8-bit, 1 × 16-bit

- Operating Voltage Range: 1.8V to 5.5V

- Operating Temperature Range: -40°C to +85°C

- Package Type: 28-pin DIP

- Mounting Type: Through-Hole

- Application Type: Embedded Control and Automation

Links

- 3D Model

- Datasheet

Tutorials

$2 Arduino The ATMEGA328 as a stand alone Easy, cheap and very small A complete guide