Part Number: ATMEGA325-16AU

Manufacturer: Microchip Technology

Description: IC MCU 8BIT 32KB FLASH 64TQFP

Shipped from: Shenzhen/HK Warehouse

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Technical Specifications of ATMEGA325-16AU

Datasheet  ATMEGA325-16AU datasheet
Category Integrated Circuits (ICs)
Family Embedded – Microcontrollers
Manufacturer Atmel
Series AVR? ATmega
Packaging Tray
Part Status Active
Core Processor AVR
Core Size 8-Bit
Speed 16MHz
Connectivity SPI, UART/USART, USI
Peripherals Brown-out Detect/Reset, POR, PWM, WDT
Number of I/O 54
Program Memory Size 32KB (16K x 16)
Program Memory Type FLASH
EEPROM Size 1K x 8
RAM Size 2K x 8
Voltage – Supply (Vcc/Vdd) 2.7 V ~ 5.5 V
Data Converters A/D 8x10b
Oscillator Type Internal
Operating Temperature -40°C ~ 85°C (TA)
Package / Case 64-TQFP
Supplier Device Package 64-TQFP (14×14)


The ATMEGA325-16AU is a high-performance microcontroller produced by Atmel®, which is now a division of Microchip Technology Inc. This flexible 8-bit microcontroller is well-known for its superior RISC architecture, low power consumption, and a slew of capabilities that make it a popular choice for a variety of embedded systems and applications. We will go into the numerous facets of the ATMEGA325-16AU microcontroller in this comprehensive guide, providing an in-depth explanation of its capabilities, features, and potential applications.

ATMEGA325-16AU at a Glance

The ATMEGA325-16AU has a plethora of features that set it different from other microcontrollers:

High Performance and Low Power Consumption

  • RISC architecture with 130 strong instructions, many of which execute in a single clock cycle.
  • It is totally static and can achieve up to 16 MIPS throughput at 16 MHz.
  • It has an on-chip 2-cycle multiplier, making it appropriate for computationally intensive workloads.
  • Power consumption is extremely low in all modes, including power-down mode, where it uses as little as 100 nA at 1.8V.

Memory Segments

  • Non-volatile memory segments having excellent durability.
  • Self-programmable Flash Program Memory in-system, with 32KBytes or 64KBytes available.
  • EEPROM storage capacities range from 1Kbyte to 2Kbytes.
  • Internal SRAM having a capacity of 2K or 4Kbytes.
  • Data retention is exceptional, with 20 years at 85°C and an astonishing 100 years at 25°C.

In-System Programming and Security

  • An on-chip boot program allows for in-system programming.
  • Provides real read-while-write functionality, increasing programming efficiency.
  • Software security programming locks ensure the integrity of your code.

QTouch® Library Support

  • Support for capacitive touch buttons, sliders, and wheels is provided by the Atmel® QTouch® library.
  • Allows QTouch and QMatrix® acquisition with up to 64 sensing channels.

JTAG Interface

  • A JTAG (IEEE standard. 1149.1 compliant) interface is provided for robust on-chip debug functionality.
  • Through the JTAG interface, it is possible to program Flash, EEPROM, fuses, and lock bits.

Peripheral Features

  • Multiple timers/counters, PWM channels, and analog-to-digital converters (ADC) are included.
  • It features a programmable serial USART as well as a Master/Slave SPI serial interface.
  • For improved communication possibilities, use the Universal Serial Interface with Start Condition Detector.
  • Precision control is provided by an on-chip analog comparator.

Special Microcontroller Features

  • Power-on reset and programmable brown-out detection are included.
  • Internally calibrated oscillator is provided for clock accuracy.
  • Supports a variety of sleep modes, including idle, ADC noise reduction, power-save, power-down, and standby, for power conservation while not in active use.

I/O and Packages

  • Provides a large number of programmable I/O lines (53/68) for flexible connectivity.
  • There are several packages available, including 64-lead TQFP, 64-pad QFN/MLF, and 100-lead TQFP.

Speed and Temperature Range

  • It is available in a variety of speed grades and temperature ranges, providing it versatility in a variety of applications.
  • Depending on the model, speed grades range from 0 to 4MHz to 0 to 16MHz.


The ATMEGA325-16AU microcontroller’s versatility and functionality make it an excellent choice for a wide variety of applications. Here’s a closer look at how this powerful microcontroller can be used in a variety of applications:

● Industrial Control Systems:

The ATMEGA325-16AU is ideal for controlling and monitoring industrial machinery such as conveyor systems, manufacturing machines, and automated processes. Its capacity to handle real-time data while consuming little power makes it a good candidate for such applications.

● Home Automation

This microcontroller can be used to control lighting, heating, air conditioning, security systems, and other home automation systems. Its low power consumption and wide I/O capabilities make it ideal for developing smart home systems.

● Robotics

Because of its great performance, low power consumption, and compatibility for several interfaces, the microcontroller is an excellent choice for operating robotic systems. It can be utilized in applications such as robotic arms, drones, and self-driving cars.

● Consumer Electronics

The ATMEGA325-16AU’s capabilities can benefit a wide range of consumer devices, including remote controls, smart appliances, and digital gadgets. Because it supports a wide range of communication protocols and peripherals, it is an appealing choice for consumer-oriented projects.

● IoT (Internet of Things) Devices:

IoT devices must consume less power and be able to connect to the internet. This microcontroller’s support for low-power modes and interfaces such as Wi-Fi, Bluetooth, and LoRa make it an important component in the development of IoT solutions such as environmental sensors, smart meters, and more.

● Automotive Applications:

This microcontroller can be utilized in a variety of automobile applications, including engine control units, infotainment systems, and advanced driver assistance systems (ADAS). It is appropriate for the automotive environment due to its ability to operate in a variety of temperature ranges and its sturdy features.

● Wearable Technology:

The ATMEGA325-16AU’s low power consumption and compact form factor make it ideal for wearable devices such as fitness trackers and smartwatches. Because of its capacity to interact with sensors and wireless communication modules, it is an important component of wearable technology.

● Medical Devices:

Medical instruments frequently necessitate precision and dependability. This microcontroller is suitable for use in patient monitoring systems, infusion pumps, and diagnostic equipment. In the medical industry, its capacity to manage data collecting and signal processing is critical.

● Sensor-Based Systems:

For sensor-based systems, the microcontroller’s support for sensor interfaces and analog-to-digital conversion (ADC) is invaluable. Environmental monitoring and security systems, as well as agricultural automation, are examples of these.

In conclusion, the ATMEGA325-16AU microcontroller is a versatile and powerful component with a wide range of applications in various industries. Its mix of high performance, low power consumption, and broad functionality makes it a popular choice among engineers and developers seeking to design new and efficient solutions in their respective sectors. The ATMEGA325-16AU microcontroller provides a firm basis for success, whether it’s improving industrial processes or making everyday life more convenient through home automation.


Discover the extraordinary ATMEGA325-16AU microcontroller by Atmel®, a pinnacle of technological innovation that seamlessly melds top-tier performance with unparalleled energy efficiency. With its robust feature set, versatile memory options, and extensive support for a wide range of interfaces, this microcontroller is the ultimate choice for a myriad of embedded system applications. Whether you’re in the midst of crafting a cutting-edge IoT device, pioneering a state-of-the-art home automation system, or engineering an industrial control solution, the ATMEGA325-16AU stands as a testament to both power and efficiency.

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