This part is a kind of semiconductor called ATTINY261V.

Function of this product has 8-bit Microcontroller.

Manufacturers : ATMEL Corporation

Image and pinout :

Some of the text within the PDF file :

Features • High Performance, Low Power AVR® 8-Bit Microcontroller • Advanced RISC Architecture – 123 Powerful Instructions – Most Single Clock Cycle Execution – 32 x 8 General Purpose Working Registers – Fully Static Operation Non-volatile Program and Data Memories – 2/4/8K Byte of In-System Programmable Program Memory Flash (ATtiny261/461/861) Endurance: 10,000 Write/Erase Cycles – 128/256/512 Bytes In-System Programmable EEPROM (ATtiny261/461/861) Endurance: 100,000 Write/Erase Cycles – 128/256/512 Bytes Internal SRAM (ATtiny261/461/861) – Programming Lock for Self-Programming Flash Program and EEPROM Data Security Peripheral Features – 8/16-bit Timer/Counter with Prescaler and Two PWM Channels – 8/10-bit High Speed Timer/Counter with Separate Prescaler 3 High Fr [ ... ]

ATTINY261V PDF Datasheet Download