Arduino UNO bootloader Atmega 328P-PU

This ATmega328P-PU microcontroller comes in a 28-pin DIP package with the Arduino Uno Optiboot bootloader pre-loaded. Drop it into a breadboard or custom PCB and program it directly from the Arduino IDE — no Arduino board required.

To get started, you'll need an external 16 MHz crystal or resonator, a 5 V supply, and a serial connection (e.g. an FTDI adapter).

Key Features

• Pre-loaded Bootloader – Optiboot (Arduino Uno) ready to go
• 28-Pin DIP Package – Breadboard and socket friendly
• 32 KB Flash – Program memory for your sketches
• 23 I/O Lines – Including 6 channels of 10-bit ADC
• Wide Voltage Range – 1.8–5 V operating voltage
• Up to 20 MHz – With external crystal
• In-Circuit Programmable – ISP header support

Specifications

• Chip: ATmega328P-PU
• Architecture: 8-bit AVR
• Package: 28-pin DIP
• Flash Memory: 32 KB
• Operating Temperature: −40 to +85 °C

Ideal For

• Custom embedded projects using Arduino code
• Permanent installations where a full Arduino board is unnecessary
• Breadboard prototyping and learning AVR architecture

Package Contents

• 1× ATmega328P-PU with Arduino Uno bootloader