93LC66B-I/SN EEPROM Microwire 4Kbit 256x16b 2MHz SOIC-8...
4Kb Microwire (3-wire) Serial EEPROM with 16-Bit Organization - Lien datasheet : https://ww1.microchip.com/downloads/aemDocuments/documents/MPD/ProductDocuments/DataSheets/93AA66X-93LC66X-93C66X-4-Kbit-Microwire-Compatible-Serial-EEPROM-Data-Sheet.pdf