This part is a kind of semiconductor called ATtiny15.

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 • RISC Architecture – 90 Powerful Instructions - Most Single Clock Cycle Execution – 32 x 8 General Purpose Working Registers – Fully Static Operation • Nonvolatile Program and Data Memories – 1K Bytes of In-System Programmable Program Memory Flash Endurance: 1,000 Write/Erase Cycles – 64 bytes of In-System Programmable EEPROM Endurance: 100,000 Write/Erase Cycles – Programming Lock for Flash Program and EEPROM Data Security • Peripheral Features – Two 8-bit Timers/Separate Prescalers One High-speed (100 kHz) PWM Output – 4-channel 10-bit ADC One Differential Voltage Input with Optional Gain of 20X – On-chip Analog Comparator – Programmable Watchdog Timer with On-chip Oscillator • Special Micro [ ... ]

ATtiny15 PDF Datasheet Download