This part is a kind of semiconductor called ATtiny43U.
Function of this product has 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 – 4K Bytes of In-System Programmable Program Memory Flash – 64 Bytes of In-System Programmable EEPROM – 256 Bytes of Internal SRAM – Write/Erase Cycles: 10,000 Flash/ 100,000 EEPROM – Data Retention: 20 years at 85°C/ 100 years at 25°C – Programming Lock for Software Security • Peripheral Features – QTouch® Library Support for Capacitive Touch Sensing (8 Channels) – Two 8-bit Timer/Counters with two PWM Channels, Each – Programmable Watchdog Timer with Separate On-chip Oscillator – On-ch [ ... ]