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ATMEGA128-16AI Datasheet, Features, Pinout, and Applications

Update Time: Jun 20, 2024      Readership: 165

ATMEGA128-16AI Datasheet, Features, Pinout, and Applications

Overview of the ATMEGA128-16AI

The ATMEGA128-16AI is a highly integrated microcontroller, equipped with a rich set of peripherals and a robust instruction set, making it suitable for a wide range of applications from industrial automation to consumer electronics.

Specifications and Features

ATMEGA128-16AI Specifications

  • Core: 8-bit AVR
  • Flash Memory: 128 KB
  • SRAM: 4 KB
  • EEPROM: 4 KB
  • Clock Speed: Up to 16 MHz
  • Operating Voltage: 4.5V to 5.5V
  • Package: 64-pin TQFP
  • Operating Temperature Range: -40°C to 85°C

ATMEGA128-16AI Features

  • High-Performance AVR RISC Architecture: 133 Powerful Instructions
  • Peripheral Features: 53 Programmable I/O Lines, 8-channel 10-bit ADC, 4 PWM Channels
  • Timers: 4 Timer/Counters
  • Communication Interfaces: USART, SPI, TWI (I2C)
  • Power Management: Multiple Sleep Modes, Power-on Reset, Brown-out Detection
  • Development Support: JTAG Interface for On-Chip Debugging

ATMEGA128-16AI Pinout

Pin Name Description Function
VCC Power Supply Powers the microcontroller
GND Ground Ground reference for the microcontroller
PORTA PA[0:7] Port A: Analog Inputs/General Purpose I/O
PORTB PB[0:7] Port B: General Purpose I/O
PORTC PC[0:7] Port C: General Purpose I/O
PORTD PD[0:7] Port D: General Purpose I/O
PORTE PE[0:7] Port E: General Purpose I/O
PORTF PF[0:7] Port F: General Purpose I/O
PORTG PG[0:4] Port G: General Purpose I/O
RESET Reset Resets the microcontroller
XTAL1 Crystal Oscillator External clock input
XTAL2 Crystal Oscillator External clock output
AVCC Analog Supply Powers the ADC
AREF Analog Reference Reference voltage for the ADC
ADC[0:7] Analog Inputs Inputs for the Analog-to-Digital Converter
JTAG JTAG Interface For debugging and programming
TWI SCL, SDA I2C Communication Lines
USART TXD, RXD UART Communication Lines
SPI MISO, MOSI, SCK, SS SPI Communication Lines

ATMEGA128-16AI Applications

Embedded Systems

The ATMEGA128-16AI is widely used in embedded systems for applications such as robotics, automation, and control systems, thanks to its rich set of peripherals and robust performance.

Industrial Automation

In industrial automation, the ATMEGA128-16AI provides the processing power and flexibility needed for controlling machinery, monitoring processes, and interfacing with sensors and actuators.

Consumer Electronics

This microcontroller is also found in consumer electronics, where it helps manage functions in devices like remote controls, home automation systems, and portable gadgets.

Automotive Systems

In automotive applications, the ATMEGA128-16AI can be used for engine control units (ECUs), infotainment systems, and other in-vehicle electronics requiring reliable and efficient operation.

Communication Systems

The ATMEGA128-16AI supports multiple communication protocols, making it suitable for use in networking and communication systems where reliable data transfer is crucial.

ATMEGA128-16AI Package

The ATMEGA128-16AI is available in a 64-pin TQFP package, which supports surface-mount technology (SMT). This package facilitates high-density PCB designs and efficient use of board space.

ATMEGA128-16AI Manufacturer

The ATMEGA128-16AI is manufactured by Microchip Technology, a leading provider of microcontroller, mixed-signal, analog, and Flash-IP solutions. Microchip offers extensive support and documentation for the ATMEGA128-16AI, ensuring ease of use and integration into electronic designs.

ATMEGA128-16AI Datasheet

Download ATMEGA128-16AI datasheet.


The ATMEGA128-16AI is a versatile and efficient microcontroller, suitable for a wide range of applications, from embedded systems to industrial automation and consumer electronics. Its combination of high performance, rich peripheral set, and robust development support makes it a valuable component in electronic designs. Microchip's commitment to quality ensures the ATMEGA128-16AI provides consistent and dependable results in various environments.

Stella Brinkley

Stella Brinkley is a senior electronics engineer with 6 years of experience, specializing in the detailed study of resistor, transistor and package design. Her comprehensive knowledge allows her to drive innovation and excellence in the electronics industry.

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