The AM2716B-250/BJA is an Electrically Programmable Read-Only Memory (EPROM) chip manufactured by AMD. EPROMs are a type of non-volatile memory that can be programmed and erased multiple times, making them useful for storing firmware, boot code, and other data that needs to be updated occasionally. The "250" in the part number indicates an access time of 250 nanoseconds.

Applications:

• Storing firmware in embedded systems
• Storing boot code in computers and other devices
• Storing configuration data in programmable logic controllers (PLCs)
• Storing character fonts in printers and other display devices
• Storing game code in arcade machines and early video game consoles

Features

• Non-volatile memory: Data is retained even when power is removed.
• Electrically programmable: Data can be written to the chip using a programmer.
• Erasable: Data can be erased using ultraviolet (UV) light.
• Relatively fast access time (250ns).
• Single 5V power supply.
• TTL compatible inputs and outputs.

Benefits

• Provides a reliable and cost-effective way to store firmware and other data.
• Allows for easy updates of firmware and other data.
• Offers a relatively fast access time for quick data retrieval.
• Simple to interface with other digital circuits.

Additional Details

The AM2716B-250/BJA is a 16,384-bit (2048 x 8) EPROM. This means it can store 2048 bytes of data. It is packaged in a 24-pin DIP (Dual In-line Package). Programming is done using a dedicated EPROM programmer that applies specific voltages to the pins to write data into the memory cells. Erasure requires exposing the chip to UV light through a quartz window on the top of the package. The chip features tri-state outputs, allowing multiple memory chips to be connected to the same bus. It operates over a standard commercial temperature range. The “BJA” suffix likely refers to a specific package type or manufacturing revision. EPROMs have been largely replaced by EEPROMs and Flash memory in modern systems due to the inconvenience of UV erasure, but they are still encountered in older equipment and hobbyist projects.