DQ2816A datasheet, DQ2816A eprom equivalent, Seeq Technology, Features and benefits, Stock and price
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for example.
That device is an electrically erasable EEPROM to store program data usually. They do not have high "endurance", they have a write cycle count of around 10,000 writes (number of times you can program it). They can read with no real "endurance" for reading the data.