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Product attributes Property Value
Manufacturer Microchip Technology
Product Series AVR® ATmega
Packaging Tray |
Core Processor AVR
Core Size 8-Bit
Speed 16MHz
Connectivity EBI/EMI, I2C, SPI, UART/USART
Peripherals Brown-out Detect/Reset, POR, PWM, WDT
Number of I/O 53
Program Memory Size 128KB (64K x 16)
Program Memory Type FLASH
EEPROM Size 4K x 8
RAM Size 4K x 8
Voltage - Supply (Vcc/Vdd) 2.7V ~ 5.5V
Data Converters A/D 8x10b
Oscillator Type Internal
Operating Temperature -40°C ~ 85°C (TA)
Grade -
Qualification AEC -
Mounting Type Surface Mount
Supplier Device Package 64-TQFP (14x14)
Package / Case 64-TQFP
ROHS RoHS Compliant - Hazardous Substance Free Electronic Components | HQICKEY

The ATMEGA128A-AU is an 8-bit AVR MCU from Microchip with 128KB flash and 4KB RAM. Running at 16MHz with 2.7-5.5V supply, it offers PWM, WDT, and brown-out detection in a 64-TQFP package for versatile control applications.

  • 128KB flash: Large memory for complex programs.
  • 5V operation: Compatible with legacy TTL logic.
  • 16MHz AVR core: Efficient single-cycle instructions.
  • 64-TQFP: Compact with good I/O density.

3D Printers

128KB flash stores complex G-code interpreters; 4KB RAM handles motion buffers.

Home Automation

5V operation and PWM for lighting and motor control.

Data Acquisition

Multiple ADC channels with 16MHz sampling for sensor arrays.

Retro Gaming

AVR architecture with ample flash for emulator firmware.

Battery Chargers

PWM and WDT ensure safe charging profiles.

Educational Kits

Well-documented AVR core ideal for learning embedded systems.

Q: What is the core?
A: AVR 8-bit.
Q: What is the max speed?
A: 16MHz.
Q: How much flash?
A: 128KB.
Q: What is the package?
A: 64-TQFP.
Base Product Number : ATMEGA128A
128KB flash 16MHz 3D printer 8-bit MCU AVR data acquisition home automation TQFP-64
Q: What is the core?
A: AVR 8-bit.
Q: What is the max speed?
A: 16MHz.
Q: How much flash?
A: 128KB.
Q: What is the package?
A: 64-TQFP.