ATMEGA328P-PU 8-Bit AVR Microcontroller – Original DIP-28 IC Chip

Power your next embedded project with the genuine ATMEGA328P-PU — Atmel's widely trusted 8-bit AVR microcontroller in the classic DIP-28 through-hole package. Whether you're building an Arduino-compatible circuit from scratch, prototyping on a breadboard, or replacing a chip in an existing design, this authentic IC delivers reliable, full-spec performance every time.

Key Features

Genuine Original IC: Authentic ATMEGA328P-PU — not a clone or remarked chip — so you get accurate specs and consistent behavior.
8-Bit AVR Architecture: High-performance, low-power RISC core running up to 20 MHz with 131 instructions for fast, efficient execution.
32KB Flash Program Memory: Ample storage for sketches and firmware with self-programming capability.
2KB SRAM & 1KB EEPROM: Onboard data memory for variables and non-volatile storage for settings and calibration values.
DIP-28 Through-Hole Package: Breadboard- and socket-friendly form factor — perfect for prototyping and easy chip swapping.
23 Programmable I/O Lines: Flexible GPIO with PWM, SPI, I²C (TWI), USART, and a 6-channel 10-bit ADC.
Arduino UNO Compatible: The same MCU used on the Arduino UNO board — pre-bootloader-ready or program it your own way via ISP.
Wide Operating Voltage: 1.8V–5.5V operating range suits both 3.3V and 5V systems.

Specifications

Part Number	ATMEGA328P-PU
Architecture	8-bit AVR RISC
Max Clock Speed	20 MHz
Flash Memory	32KB
SRAM	2KB
EEPROM	1KB
I/O Pins	23
ADC Channels	6 × 10-bit
Package	DIP-28
Operating Voltage	1.8V – 5.5V
Quantity	1 piece

Who Is This For?

The ATMEGA328P-PU is ideal for hobbyists, students, educators, and professional engineers who need a dependable, well-documented AVR MCU. Use it for Arduino UNO replacements, standalone microcontroller builds, robotics controllers, sensor interfaces, and countless other embedded applications.

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Frequently Asked Questions

Q: Is this ATMEGA328P-PU genuine and original?

A: Yes. This is an authentic, original ATMEGA328P-PU microcontroller — not a clone or counterfeit chip. You can expect full datasheet-rated performance including 32KB Flash, 2KB SRAM, and accurate ADC readings right out of the package.

Q: Is the ATMEGA328P-PU compatible with Arduino UNO?

A: Absolutely. The ATMEGA328P-PU is the exact MCU used on the Arduino UNO. You can program it with the Arduino IDE via an ISP programmer or load the Arduino bootloader to use it with a USB-to-serial adapter.

Q: What is the DIP-28 package and why does it matter?

A: DIP-28 (Dual In-line Package, 28 pins) is a through-hole format that fits directly into standard breadboards and IC sockets without soldering, making it ideal for prototyping, swapping chips, and beginner-friendly circuit building.

Q: What programming interfaces does the ATMEGA328P-PU support?

A: The chip supports In-System Programming (ISP/SPI), JTAG, and a High-Voltage Serial/Parallel interface, giving you multiple options for flashing firmware using tools like USBasp, AVR Dragon, or an Arduino acting as an ISP programmer.

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.