ATmega328P Microcontroller with Arduino Bootloader

ATmega328P Microcontroller with Arduino Bootloader — DIP-28

The ATmega328P is the heart of the Arduino Uno — an 8-bit AVR microcontroller with the Arduino Uno bootloader pre-loaded, ready to program via USB without a dedicated programmer. Drop-in replacement for a faulty Arduino Uno MCU, or use standalone in your own PCB design with a minimal external circuit.

Key Specifications

• Architecture: 8-bit AVR | Package: DIP-28
• Clock speed: 16MHz (with external crystal) | Flash: 32KB | SRAM: 2KB | EEPROM: 1KB
• Digital I/O: 23 pins | PWM: 6 channels | ADC: 6 channels (10-bit)
• Interfaces: UART / SPI / I2C | Operating voltage: 1.8V–5.5V
• Bootloader: Arduino Uno (Optiboot) pre-loaded | Baud rate: 115200
• Compliance: RoHS compliant

Why Choose This?

• ✅ Arduino bootloader pre-loaded — program directly via USB-to-serial adapter, no ISP programmer needed
• ✅ DIP-28 package — breadboard and socket compatible, ideal for prototyping and standalone designs
• ✅ Drop-in Arduino Uno replacement — swap out a faulty MCU without replacing the entire board
• ✅ Minimal external circuit — add a 16MHz crystal, two capacitors and a reset resistor to run standalone

Typical Applications

• Arduino Uno MCU replacement and repair
• Standalone AVR microcontroller projects
• Custom PCB designs requiring Arduino compatibility
• Embedded systems prototyping and production

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