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ST Microelectronics 256k EPROM Chip

  • Manufactured by ST Microelectronics
  • .625 in. H x 1.375 in. W x .375 in. D
    Aluminum, ceramic, silicon
  • On display in Making Modernity
  • 2007.117.006


EPROM, or eraseable programmable read-only memory, is a type of chip that maintains its data even when the device’s power supply is turned off. Once the chip is programmed, the only way to erase it is to remove it from the device and expose it to a very strong type of ultraviolet light.

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