ATmega328P-PU 8-Bit Microcontroller (28-Pin DIP High-Performance Processor)
Power your core robotics, automation platforms, and embedded system designs with the industrial-grade ATmega328P-PU Microcontroller. Globally recognized as the high-performance brain driving the legendary Arduino Uno development boards, this legendary 8-bit AVR microchip delivers massive computing flexibility, robust power management, and extensive peripheral configurations in a breadboard-friendly 28-pin package.
Built on an advanced RISC (Reduced Instruction Set Computer) architecture, the ATmega328P-PU executes powerful instructions in a single clock cycle. This allows the processor to balance processing throughput with minimal energy consumption. It serves as the definitive choice for standalone automation circuits, custom sensor interfacing shields, DIY consumer electronics, and primary control units in commercial instrumentation.
Key Features
High-Efficiency AVR RISC Core: Features 131 powerful internal instructions—most of which execute in one single clock cycle—achieving up to 20 million instructions per second when running at its maximum 20-megahertz clock rate.
Robust Embedded Memory Architecture: Packed with 32 kilobytes of high-speed in-system programmable Flash memory for your main firmware code, alongside 2 kilobytes of internal Static Random Access Memory and 1 kilobyte of true EEPROM for non-volatile parameter storage.
On-Chip Analog Peripherals: Equipped with an integrated 8-channel, 10-bit Analog-to-Digital Converter layout that enables accurate voltage tracking for temperature sensors, gas modules, and potentiometers.
Advanced Multi-Channel Pulse Width Modulation: Features 6 independent Pulse Width Modulation output tracks, making it incredibly simple to drive servo motors, control DC motor speeds, or run LED dimming arrays without stressing the main CPU timer loop.
Universal Hardware Serial Communication: Assembled with dedicated hardware interfaces including a programmable Serial USART, a master/slave Serial Peripheral Interface, and a 2-wire serial interface (fully compatible with inter-integrated circuit hardware).
Technical Specifications
Feature | Specification |
Core Architecture | Microchip / Atmel 8-Bit AVR RISC |
Maximum Operating Frequency | 20 megahertz |
Program Flash Memory | 32 kilobytes (with optional Bootloader support) |
Internal SRAM | 2 kilobytes |
Data EEPROM | 1 kilobyte |
Operating Voltage Range | 1.8V to 5.5V DC |
General Purpose I/O Pins | 23 programmable Input/Output lines |
Hardware Timers | 2 x 8-bit Timers/Counters, 1 x 16-bit High-Precision Timer/Counter |
Package Type | PDIP-28 (Plastic Dual In-line Package - 28 Pin) |
Mounting Style | Through-Hole Mount (Fits standard IC sockets and breadboards) |
Hardware Architecture & Pin Layout
The 28-pin dual in-line package configuration makes this chip an absolute favorite for fast circuit prototyping and laboratory testing:
General Purpose Input/Output Blocks: Pins are split across three organized software ports (Port B, Port C, and Port D), offering complete software control over internal pull-up resistors and digital states.
Watchdog Timer Loop: Built with an independent onboard watchdog timer with its own internal oscillator, preventing firmware lockups by automatically resetting the processor if system errors occur.
Ultra-Low Power Optimization: Employs picoPower technology to support multiple low-energy sleep configurations (Idle, ADC Noise Reduction, Power-save, Power-down, Standby, and Extended Standby), minimizing current consumption to fractions of a microamp during system sleep cycles.
Common Applications
Standalone Microcontroller Projects: Build custom, minimal-footprint embedded devices directly on a blank printed circuit board without needing the full bulk of an Arduino development board.
Industrial Data Acquisition Hubs: Serve as the core processing engine to poll data from analog temperature probes, gas modules, and light sensors before transmitting the results over serial links.
Autonomous Robotics Systems: Manage complex motor driver commands, read ultrasonic distance metrics, and navigate autonomous wheeled rovers.
Smart Home Security Systems: Coordinate input matrices from keypad modules, process signals from motion detectors, and switch high-power relays to manage automatic door locks.
🛠️ Hardware Design Pro-Tip: When building an isolated standalone circuit using the ATmega328P-PU, always place a 16-megahertz or 20-megahertz quartz crystal oscillator alongside two 22-picofarad ceramic stabilizing capacitors directly across the XTAL1 and XTAL2 clock pins. Additionally, position a standard 100-nanofarad decoupling capacitor across the primary power input and ground pins to screen out ambient high-frequency electrical noise.
Package Includes:
1 x ATmega328P-PU 8-Bit Microcontroller Chip (28-Pin DIP Package)