The HN27128AG-17 is a 128K (16K x 8) bit Erasable Programmable Read-Only Memory (EPROM) manufactured by Hitachi. It is a non-volatile memory device that can be electrically programmed and erased, making it suitable for applications where firmware or data needs to be updated or changed.

Applications:

• Microcontroller firmware storage
• Embedded systems
• Industrial control systems
• Instrumentation
• Data logging
• Programmable logic controllers (PLCs)

Features:

• 128K (16K x 8) bit EPROM
• Erasable and reprogrammable
• Single 5V power supply
• Fast access time (170ns)
• TTL compatible inputs and outputs
• Three-state output

Benefits:

• Non-volatile data storage
• Easy firmware updates
• Reliable operation
• Cost-effective memory solution
• Simple interface to microprocessors and microcontrollers

Additional Details:

The HN27128AG-17 requires a single 5V power supply for operation. Data is written to the EPROM by applying a high-voltage programming pulse. The device can be erased by exposing it to ultraviolet (UV) light through a quartz window on the package. After erasure, the memory cells are reset to a logic '1' state and can be reprogrammed. The 170ns access time allows for fast data retrieval. It is typically packaged in a 28-pin DIP (Dual In-line Package).

The HN27128AG-17 is commonly used in embedded systems where firmware needs to be stored and potentially updated. The erasable and reprogrammable nature of the EPROM makes it a versatile memory solution for a wide range of applications. The three-state output allows for easy interface with other memory devices and microprocessors.