SPI interface, serial communication interface, Microwire sensor, usb eeprom programmer

 93LC46 Series 1 Kbit (128 x 8 / 64 x 16) 5.5 V Microwire Serial EEPROM - SOIC-8

https://www.futureelectronics.com/p/semiconductors--memory--RAM--eeprom--micro-wire-interface-protocol/93lc46c-i-sn-microchip-5330386