AT28C256 Military Grade Datasheet by Microchip Technology | Digi-Key Electronics
GitHub - Wh1teRabbitHU/EEPROMAdapter: This adapter can read and write AT28C64 and AT28C256 EEPROM chips. Creating converter PCB for this task recommended
AT28c256 15PI Atmel 256K (32K x 8) CMOS EEPROM NOS Industrial | eBay
AT28C256 | Microchip Technology
AT28C256 | Microchip Technology
Atmel AT28C256-15PI 28C256 32K x 8 EEPROM PDIP28 150ns x 1PC | eBay