ATMEGA128A-AU

IC: AVR microcontroller; TQFP64; 2.7÷5.5VDC; Ext.inter: 8; Cmp: 1

ATMEGA128A-AU – 8-bit AVR Microcontroller – Microchip Technology
Optimize your embedded designs with the ATMEGA128A-AU from Microchip Technology, a high-performance 8-bit AVR microcontroller featuring 128KB flash memory and versatile connectivity. Engineered for reliability in industrial environments, this IC delivers efficient processing with low power consumption. PCX supplies genuine components with same-day shipping and dedicated technical support.

Key Features

Core: 8-bit AVR RISC processor @ 16MHz
Memory: 128KB Flash + 4KB EEPROM + 4KB SRAM
Voltage Range: 2.7V–5.5V DC (wide operating tolerance)
I/O Capability: 53 programmable I/O pins
Connectivity: SPI, I2C, UART/USART, EBI/EMI
Operating Temp: -40°C to +85°C (industrial grade)

Technical Details
Housed in a compact 64-TQFP package (14x14mm), this surface-mount microcontroller integrates critical peripherals including 8-channel 10-bit ADC, PWM controllers, and watchdog timer. Features brown-out detection, power-on reset, and internal oscillator for simplified designs. Organized with Harvard architecture for simultaneous program/data access.

Typical Applications

Industrial automation controllers
Consumer electronics and IoT devices
Motor control systems
Embedded sensor interfaces
Human-machine interfaces (HMI)

About Microchip Technology
Microchip Technology is a global leader in microcontroller and analog semiconductor solutions, renowned for innovation in embedded control systems. With over 30 years of industry leadership, their components are synonymous with quality and long-term reliability across automotive, industrial, and consumer markets.
The company maintains rigorous testing standards and extended product lifecycles, ensuring design stability for critical applications. Microchip’s AVR® series, including this ATMEGA128A-AU, represents industry benchmarks in 8-bit processing efficiency and power management.

About Microcontrollers
Microcontrollers serve as the computational core in embedded systems, integrating processor, memory, and I/O interfaces on a single chip. Unlike general-purpose processors, they provide deterministic real-time control with minimal power consumption – essential for battery-operated and space-constrained devices.
Modern microcontrollers like this AVR® device enable sophisticated functions from motor speed regulation to wireless communication. Their programmable nature allows hardware customization through firmware, reducing component count while increasing system reliability in demanding environments.

Packaging
Supplied in protective trays for automated assembly. Tape & Reel options available upon request.

FAQs
Q: Is this MCU 5V tolerant?
A: Yes, it operates from 2.7V to 5.5V, supporting legacy 5V systems and modern low-voltage designs.

Q: What development tools support this microcontroller?
A: Compatible with Microchip’s MPLAB® X IDE and AVRDUDE programmers. Full toolchain details in the datasheet.

Q: Does it include on-chip debugging?
A: Yes, features JTAG interface for real-time debugging and flash programming.

Q: Can I migrate from older ATmega128 versions?
A: This A-revision offers improved power efficiency and instruction set enhancements while maintaining pin compatibility.

Q: What’s the difference between SRAM and EEPROM?
A: SRAM stores volatile runtime data; EEPROM retains parameter settings through power cycles (100K write cycles endurance).

Q: Is industrial temperature