The D2764A-25 is a 64K (8K x 8) EPROM (Erasable Programmable Read-Only Memory) manufactured by Intel. It's designed for storing non-volatile data or program code in embedded systems. The "-25" suffix typically indicates the access time, in this case, 250ns.

Applications:

• Embedded systems (e.g., industrial controllers, instrumentation)
• Firmware storage for early personal computers
• Programmable logic controllers (PLCs)
• Robotics
• Telecommunications equipment

Features:

• 64K (8K x 8) memory organization
• EPROM (Erasable Programmable Read-Only Memory) technology
• Access time: 250ns
• Single +5V power supply
• TTL compatible inputs and outputs
• Three-state output
• Programmable using standard EPROM programmers

Benefits:

• Provides non-volatile storage for program code and data.
• Allows for easy reprogramming using UV light erasure.
• Offers a reliable and stable memory solution for embedded systems.
• Compatible with standard TTL logic circuits.

Additional Details:

The D2764A-25 is housed in a ceramic DIP (Dual In-line Package) with a quartz window, which allows the memory to be erased by exposing it to ultraviolet (UV) light of a specific wavelength (typically 253.7 nm). The erasure process resets all memory cells to a known state, allowing the device to be reprogrammed with new data.

During operation, the D2764A-25 requires a single +5V power supply. The address lines are used to select a specific memory location, and the data lines provide the 8-bit output. The three-state output allows multiple memory devices to share a common data bus.

Programming the D2764A-25 involves applying specific voltage levels to the address, data, and control pins using a dedicated EPROM programmer. The programming process typically involves writing data byte by byte to the desired memory locations.