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EEPROM - delivered with latest 65uino-firmware preprogrammed. Note the photo is not the W27E257 Please be aware this is a used and discontinued IC and even though we test used IC's before reselling them, they should only be considered as a functional collector's item and comes with no guarantee it will keep functioning within the specs of the original datasheet.
The Winbond W27E257 is similar to the W27C512 but half the capacity. It is an integrated circuit (IC) commonly known as a Read-Only Memory (ROM) chip. This particular IC is used for non-volatile storage of data and program code in electronic systems.
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