The description :

• A microcontroller is an integrated and compact circuit, designed to govern a specific operation and in an integrated system.
• It includes processor, memory, and input and output devices on a single card or chip.
• These circuits are used in vehicles, robots, industrial machines, medical devices, mobile radio transceivers, vending machines and even household appliances.

Specifications:

• Type: IC chip.
• Model Number: Atmega128.
• Serie: ATMega.
• Box: TQFP-64.
• Number of pins: 64. 8-bit AVR microcontroller.
• Operating Voltage: 4.5 → 5.5V.
• Maximum operating frequency: 16 MHz.
• Dimensions (excluding pins): 14.1 x 14.1 x 1.05 mm.
• Operating temperature: -40 ~ 85 ° C.
• Technical sheet : https://docs.rs-online.com/34b8/0900766b8091f46d.pdf