Product Overview

ATMEGA328P-MU from Microchip is a low-power CMOS 8-bit microcontroller based on the AVR enhanced RISC architecture, part of the megaAVR family. It executes instructions in a single clock cycle, achieving up to 1 million instructions per second (MIPS) per megahertz, perfectly balancing processing speed and power consumption, making it ideal for various embedded control applications.

Key Features

• Balanced Performance and Low Power：Supports up to 20MHz operating frequency. At 1MHz, 1.8V, 25°C, active mode consumes only 0.2mA, and power-down mode as low as 0.1µA, meeting low-power device requirements.
• Advanced RISC Architecture and Rich Instruction Set：Equipped with 131 powerful instructions (most single-cycle), and 32 x 8 general-purpose working registers, improving code efficiency and execution speed.
• Powerful Non-volatile Memory：Includes 32KB In-System programmable Flash (10,000 write/erase cycles), 1KB EEPROM (100,000 cycles), and 2KB SRAM, with data retention of 20 years85°C/100 years25°C.
• Abundant Peripheral Interfaces：Integrates 3 timers (with PWM), 10-bit ADC (8 channels), USART, SPI, I2C, etc., meeting diverse peripheral connection needs.
• QTouch® Capacitive Touch Support：Enables capacitive buttons, sliders, and wheels without additional hardware, simplifying human-machine interaction design.

Technical Specifications

Item	Details
Core Architecture	AVR enhanced RISC 8-bit MCU
Memory	32KB Flash, 1KB EEPROM, 2KB SRAM
Operating Voltage	1.8 - 5.5V
Temperature Range	-40°C to 85°C
Speed Grade	0-20MHz4.5-5.5V; 0-10MHz@2.7-5.5V
Programmable I/O Lines	23
Timers	2 x 8-bit (with PWM), 1 x 16-bit (with capture/compare)
Analog Peripherals	10-bit ADC (8 channels, temperature measurement support)
Communication Interfaces	USART, SPI, I2C (Philips compatible)
Package Type	28-pad QFN/MLF

Typical Applications

• Smart Home Devices：With low power consumption and rich interfaces, it serves as a sensor node controller, connecting temperature, humidity, and light sensors for intelligent environment monitoring and control.
• Embedded Control Systems：In small industrial control equipment, it realizes precise operations like motor speed regulation and valve control via timers and PWM.
• Consumer Electronics：QTouch support allows integration into remote controls and smart wearables, enabling touch interaction without physical buttons.
• Sensor Nodes：10-bit ADC and low-power design make it suitable for battery-powered sensor nodes, such as IoT environmental monitoring terminals.
• Education and Maker Projects：Widely compatible with Arduino and other development platforms, it is ideal for learning embedded development and building small robots.

Why Choose ATMEGA328P-MU?

• Perfect Balance of Performance and Power：Up to 20MHz processing speed with microamp-level power consumption, catering to both complex tasks and long battery life.
• Rich Peripherals Simplify Design：Integrated communication and analog peripherals reduce external components, lowering hardware design complexity.
• Reliable Memory Performance：High erase/write cycles and long data retention ensure stable data in long-term use.
• Flexible Development Support：Supports In-System programming and Boot Loader, compatible with mainstream tools, shortening development cycles.
• Extended Interaction Capability：QTouch support eliminates mechanical buttons, enhancing durability and user experience.

SUNTOP COMPANY INTRODUCTION

Founded in 2000, Suntop is one of the leading global distributors of electronic components, dedica ted to providing comprehensive procurement and supply chain services to the global electronics manufacturing industry. Our services include distribution, spot trading, PPV cost-saving projects, and inventory management. We not only offer high-quality products but also strive to assist our clients in achieving optimal solutions with minimal time and cost.
As a trusted partner for numerous OEMs, ODMs, CEMs, and EMS companies worldwide, our professional team manages millions of component records from thousands of trading partners across dozens of countries daily through our company database. We maintain close business relationships with major factories and distributors in North America, Europe, and Asia to ensure that our clients stay ahead in a highly competitive market.