This part is a kind of semiconductor called 93C56.

Function of this product has 3-Wire Serial EEPROMs.

Manufacturers : ATMEL Corporation

Image and pinout :

Some of the text within the PDF file :

Features • Low-voltage and Standard-voltage Operation – 2.7 (VCC = 2.7V to 5.5V) – 1.8 (VCC = 1.8V to 5.5V) • User-selectable Internal Organization – 1K: 128 x 8 or 64 x 16 – 2K: 256 x 8 or 128 x 16 – 4K: 512 x 8 or 256 x 16 • Three-wire Serial Interface • 2 MHz Clock Rate (5V) • Self-timed Write Cycle (10 ms max) • High Reliability – Endurance: 1 Million Write Cycles – Data Retention: 100 Years • Automotive Grade, Extended Temperature and Lead-Free/Halogen-Free Devices Available • 8-lead PDIP, 8-lead JEDEC SOIC, 8-lead EIAJ SOIC, 8-lead MAP, 8-lead TSSOP, and 8-ball dBGA2 Packages Description The AT93C46/56/66 provides 1024/2048/4096 bits of serial electrically erasable programmable read-only memory (EEPROM), organized as 64/128/256 words of 16 bits each (w [ ... ]

93C56 PDF Datasheet Download