Microchip Technology

ATMEGA328P-PU  

Microcontrollers

ATMEGA328P-PU Description

The ATMEGA328P-PU is an 8-bit AVR microcontroller from Microchip Technology, featuring 32KB of Flash program memory, 1KB EEPROM, and 2KB SRAM. Operating within a 1.8V to 5.5V supply range, it supports clock speeds up to 20MHz with an internal oscillator, making it highly versatile for low-power and battery-operated applications. Housed in a 28-pin DIP (Dual Inline Package), it is designed for through-hole mounting, ensuring ease of prototyping and integration in industrial, educational, and hobbyist projects.

ATMEGA328P-PU Features

• High-Performance AVR Core: Efficient 8-bit RISC architecture with 131 powerful instructions, enabling rapid execution of complex tasks.
• Rich Peripheral Set: Includes 6-channel 10-bit ADC, 23 programmable I/O lines, and hardware-supported I2C, SPI, and UART/USART interfaces for seamless connectivity.
• Robust Memory Configuration: 32KB Flash (16K x 16) for code storage, 1KB EEPROM for non-volatile data, and 2KB SRAM for dynamic operations.
• Wide Voltage Range (1.8V–5.5V): Ideal for both low-power and standard 5V systems, with REACH and RoHS3 compliance for environmental safety.
• Internal Oscillator: Eliminates the need for external clock components, reducing BOM cost and PCB complexity.

ATMEGA328P-PU Applications

• Embedded Control Systems: Widely used in automation, sensor nodes, and industrial control due to its reliability and peripheral integration.
• DIY Electronics & Prototyping: Popular in Arduino-compatible boards (e.g., Arduino Uno) for educational and hobbyist projects.
• Consumer Electronics: Powers devices like smart home gadgets, wearables, and toys, leveraging its low-power modes.
• IoT Edge Devices: Combines connectivity (UART, SPI) with analog sensing (ADC) for edge computing applications.

Conclusion of ATMEGA328P-PU

The ATMEGA328P-PU stands out as a cost-effective, feature-rich microcontroller, balancing performance, power efficiency, and ease of use. Its DIP package simplifies prototyping, while the 20MHz speed and versatile I/O cater to diverse embedded applications. Compared to similar MCUs, it offers superior memory density and wide voltage tolerance, making it a top choice for developers seeking a reliable, scalable solution in industrial, educational, and IoT domains.

ATMEGA328P-PU Documents

Download datasheets and manufacturer documentation for ATMEGA328P-PU

Errata :

ATmega48A/PA/88A/PA/168A/PA/328/P Errata      

PCN Assembly/Origin :

ATMEGAyy Test Site 18/Dec/2023      

Datasheets :

ATmega48A/PA/88A/PA/168A/PA/328/P      

PCN Packaging :

Boxes 07/Dec/2016       Transfer to Microchip/Label/Pkg 5/Sep/2016      

Design Resources :

ATmega328 Development Tool Selector      

PCN Design/Specification :

Marking Chgs 11/Jul/2017       ATmega48A/PA/88A/PA/168A/PA/328/P 10/Sep/2020      

Environmental Information :

Microchip CA Prop65       Microchip RoHS       Microchip REACH