This part is a kind of semiconductor called ATmega328V.

Function of this product has (ATmegaxxxP/V) 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 – 131 Powerful Instructions – Most Single Clock Cycle Execution – 32 x 8 General Purpose Working Registers – Fully Static Operation – Up to 20 MIPS Throughput at 20 MHz – On-chip 2-cycle Multiplier Non-volatile Program and Data Memories – 4/8/16/32K Bytes of In-System Self-Programmable Flash (ATmega48P/88P/168P/328P) Endurance: 10,000 Write/Erase Cycles – Optional Boot Code Section with Independent Lock Bits In-System Programming by On-chip Boot Program True Read-While-Write Operation – 256/512/512/1K Bytes EEPROM (ATmega48P/88P/168P/328P) Endurance: 100,000 Write/Erase Cycles – 512/1K/1K/2K Byte Internal SRAM (ATmega48P/88P/168P/328P) – Programming [ ... ]

ATmega328V PDF Datasheet Download