Difference Between PROM and EPROM

ComputersHardwareComputer Network

In this post, we will understand the difference between PROM and EPROM −

PROM (Programmable read-only memory)

  • It is not reusable.

  • It is not expensive.

  • Once a PROM has been processed, it can’t be reversed.

  • This means, its memory is permanent.

  • Storage endurance of PROM is high.

  • It is completely sheathed during a plastic cowl.

  • It is a write-only ROM.

  • If there is an error or bug while writing on PROM, it can’t be changed- making it unusable.

  • It is known as the older version of EPROM.

  • It is better than EPROM in terms of flexibility and scalability.

  • A bipolar transistor is used in PROM.

EPROM (Erasable Programmable read-only memory)

  • It is a reusable ROM.

  • It is expensive in comparison to PROM.

  • The processes of EPROM can be reversed.

  • The storage endurance of EPROM is higher in comparison to PROM.

  • It is boxed during a rock crystal window so that ultraviolet radiation rays can transfer through it.

  • It is a type of ROM that is read and write.

  • If there is an error or bug while writing to EPROM, it can be reversed, and used again.

  • It can be considered as the modern version of PROM.

  • It is less flexible and scalable in comparison to PROM.

  • An MOS transistor is used in EPROM.

Published on 16-Apr-2021 07:42:12