EPROM (Erasable Programmable ROM)

EPROM (Erasable Programmable Read-Only Memory)

Definition: EPROM is a type of non-volatile memory used in computers and other electronic devices for the storage of data. The "Erasable" part of its name indicates that it can be erased and reprogrammed multiple times, unlike traditional ROM (Read-Only Memory) which is typically written once and then remains unchanged.

Function: EPROMs are designed to retain their data even when power is turned off. They are programmed using a high-voltage pulse, and erased by exposure to ultraviolet (UV) light. This allows for the updating of the stored data without the need to replace the memory chip.

Applications: EPROMs are used in various applications where firmware or software needs to be updated or modified. They are commonly found in microcontrollers, embedded systems, and other devices where the ability to update the stored program is necessary. Examples include computer BIOS, industrial control systems, and early video game consoles.

Selection Criteria: When choosing an EPROM, several factors should be considered:
1. Capacity: The amount of data that needs to be stored will determine the required memory size.
2. Speed: The access time of the EPROM, which affects the performance of the system.
3. Voltage Requirements: The operating voltage of the EPROM must be compatible with the system it is being used in.
4. Package Type: The physical form factor of the EPROM, which must fit the available space on the circuit board.
5. Erasability: The ease and speed of erasing the EPROM, which is important for frequent updates.
6. Cost: The price of the EPROM, which can vary based on the above factors and the manufacturer.

It's worth noting that EPROM technology has largely been replaced by EEPROM (Electrically Erasable Programmable Read-Only Memory) and flash memory due to their easier programming and erasing processes, which do not require exposure to UV light.
Please refer to the product rule book for details.