ATMEGA328P-PU DIP-28 — 8-Bit AVR Microcontroller IC

The ATMEGA328P-PU is a high-performance, low-power 8-bit AVR RISC-based microcontroller in a DIP-28 through-hole package. Widely used in Arduino Uno boards and custom embedded projects, this IC delivers 32KB of in-system self-programmable flash memory, 2KB SRAM, and 1KB EEPROM — making it one of the most popular microcontrollers for hobbyists, students, and professional engineers alike.

Key Features

Architecture: 8-bit AVR RISC — up to 20 MIPS throughput at 20 MHz
Package: DIP-28 (through-hole) — easy to breadboard and prototype
Flash Memory: 32KB (with 2KB used by bootloader if pre-loaded)
SRAM: 2KB & EEPROM: 1KB
Operating Voltage: 1.8V – 5.5V
I/O Pins: 23 programmable I/O lines
Timers: Two 8-bit timers/counters and one 16-bit timer/counter
Communication: USART, SPI, I²C (TWI) interfaces built in
ADC: 6-channel, 10-bit analog-to-digital converter
Low Power Modes: Multiple sleep modes for energy-efficient designs
Customizable: Fully programmable via ISP, JTAG, or Arduino IDE

What's Included

1 × ATMEGA328P-PU DIP-28 Microcontroller IC

Ideal Applications

Arduino-compatible projects & custom boards
Embedded systems development & prototyping
Robotics, automation & sensor interfacing
DIY electronics, makers & STEM education
Industrial control & home automation systems

Why Choose This Microcontroller?

The ATMEGA328P-PU is the backbone of countless embedded designs worldwide. Its DIP-28 form factor makes it perfect for breadboard prototyping, and its compatibility with the Arduino platform means you can get up and running fast using the Arduino IDE — no specialist equipment required. Whether you're replacing a chip, stocking your workbench, or building a new project from scratch, this microcontroller offers outstanding value and proven reliability.

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Frequently Asked Questions

Q: What is the difference between ATMEGA328P-PU and ATMEGA328-PU?

A: The ATMEGA328P-PU is the picoPower version of the ATMEGA328-PU. It features enhanced low-power sleep modes and slightly improved power management, making it the preferred choice for battery-operated or energy-sensitive designs. Both chips are functionally compatible and use the DIP-28 through-hole package.

Q: Is this chip compatible with Arduino Uno?

A: Yes. The ATMEGA328P-PU is the exact microcontroller used on the official Arduino Uno board. If your chip comes pre-loaded with the Arduino bootloader, you can program it directly via the Arduino IDE using a USB-to-serial adapter. If it is a blank chip, you can burn the bootloader using an ISP programmer.

Q: Can I use this chip on a breadboard for prototyping?

A: Absolutely. The DIP-28 through-hole package is specifically designed for breadboard and perfboard use, making the ATMEGA328P-PU one of the most beginner-friendly microcontrollers available. Simply insert it into a standard breadboard, connect power, a crystal oscillator, and decoupling capacitors, and you are ready to program and test your circuit.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.