The AT28HC256-70JU is an EEPROM (Electrically Erasable Programmable Read-Only Memory) integrated circuit manufactured by Microchip Technology. It features a parallel interface and offers a storage capacity of 256Kbits, organized as 32K x 8. This EEPROM operates on a 5V power supply and comes in a 32-pin PLCC package. The AT28HC256-70JU is housed in a tube for easy handling and transportation. It is suited for various applications requiring non-volatile memory, including automotive, industrial, and consumer electronics.