ATmega328P-U 8-Bit AVR RISC Microcontroller 32KB Flash 20MHz 28-DIP Through-Hole

The ATmega328P-U is a high-performance low-power 8-bit AVR RISC-based microcontroller from Microchip (formerly Atmel). Featuring 32KB ISP flash memory, 2KB SRAM, and 1KB EEPROM, this 28-pin DIP IC is the core chip powering popular development platforms like the Arduino Uno. It is the perfect choice for embedded systems, DIY robotics, IoT prototypes, and custom standalone circuit designs.

The “U” suffix denotes full RoHS compliance with lead-free matte tin finishes, ensuring environmental safety and reliable solderability for production lines or hobbyist breadboards. Supporting up to 20MHz and a versatile 1.8V–5.5V range, it adapts easily to various power supplies and battery-operated applications. With 23 programmable I/O lines, internal interrupts, and multi-channel 10-bit ADC, it seamlessly bridges software logic and hardware control.

Key Specifications

• Core Processor: AVR 8-Bit RISC
• Package: 28-DIP (0.300" / 7.62mm) Through-Hole
• Program Memory: 32 KB Flash (ISP)
• SRAM: 2 KB
• EEPROM: 1 KB
• Max Clock Frequency: 20 MHz
• Operating Voltage: 1.8V to 5.5V
• I/O Pins: 23 programmable
• ADC: 6-channel, 10-bit
• Communication: UART/USART, SPI, I2C (2-Wire)
• PWM Channels: 6
• Peripherals: Brown-out Detect/Reset, POR, WDT
• Oscillator: Internal / External
• Operating Temperature: −40°C to +85°C
• Compliance: RoHS, Lead-Free (“U” suffix)

Applications

• DIY Arduino-based prototypes and Arduino Uno chip replacement
• Home automation systems and IoT nodes
• Robotics and motor control circuits
• Sensor data logging devices
• Educational electronic kits and STEM learning

Package Includes

• 1 x ATmega328P-U 8-Bit AVR Microcontroller (28-DIP)

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