Serial communication interface, h-Performance Parallel EEPROM, SPI interface

 AT28C64B Series 64 KB (8 K x 8) 5.5 V High-Performance Parallel EEPROM - DIP-28

https://www.futureelectronics.com/p/semiconductors--memory--RAM--eeprom--parallel/at28c64b-15pu-microchip-2045833