This part is a kind of semiconductor called AT90S4433-8PI.

Function of this product has 8-Bit AVR Microcontroller with 4K Bytes of In-System Programmable Flash.

Manufacturers : ATMEL Corporation

Image and pinout :

Some of the text within the PDF file :

Features • High-performance and Low-power AVR® 8-bit RISC Architecture – 118 Powerful Instructions - Most Single Cycle Execution – 32 x 8 General Purpose Working Registers – Up to 8 MIPS Throughput at 8 MHz Data and Nonvolatile Program Memory – 2K/4K Bytes of In-System Programmable Flash Endurance 1,000 Write/Erase Cycles – 128 Bytes of SRAM – 128/256 Bytes of In-System Programmable EEPROM Endurance: 100,000 Write/Erase Cycles – Programming Lock for Flash Program and EEPROM Data Security Peripheral Features – One 8-bit Timer/Counter with Separate Prescaler – Expanded 16-bit Timer/Counter with Separate Prescaler, Compare, Capture Modes and 8-, 9- or 10-bit PWM – On-chip Analog Comparator – Programmable Watchdog Timer with Separate On-chip Oscillator – Programmable [ ... ]

AT90S4433-8PI PDF Datasheet Download