The AM27C256-200PC is a 256K (32K x 8) UV Erasable PROM (EPROM) manufactured by Advanced Micro Devices (AMD). It is a non-volatile memory device that can be electrically programmed and erased by exposure to ultraviolet (UV) light. It is commonly used in embedded systems and other applications requiring reprogrammable memory.

Applications

• Embedded Systems: Used for storing firmware and program code in embedded systems.
• Microcontroller Programming: Employed for programming microcontrollers and microprocessors.
• Industrial Control Systems: Found in industrial control equipment for storing configuration data and control algorithms.
• BIOS Storage: Used in older computer systems for storing the BIOS (Basic Input/Output System).
• Development and Prototyping: Utilized in development boards and prototyping environments.

Features

• 256K Memory Capacity: Provides a storage capacity of 256 kilobits (32 kilobytes).
• UV Erasable: Can be erased by exposure to ultraviolet (UV) light.
• Fast Access Time: Features a fast access time of 200 nanoseconds (ns).
• Single 5V Power Supply: Operates from a single 5V power supply.
• TTL Compatible: TTL (Transistor-Transistor Logic) compatible inputs and outputs.
• DIP Package: Available in a DIP (Dual In-line Package) for easy prototyping and breadboarding.

Benefits

• Reprogrammable Memory: UV erasable feature allows for reprogramming and updating the memory contents.
• Fast Access Time: Fast access time ensures quick data retrieval and efficient system performance.
• Easy to Use: Simple programming and erasing procedures make it easy to use in various applications.
• Wide Availability: Commonly available and widely used in legacy systems.
• Cost-Effective: Provides a cost-effective solution for non-volatile memory storage.

Additional Details

The AM27C256-200PC requires a UV eraser for erasing the memory contents. The erasing process typically takes several minutes to complete. The programming process involves applying specific voltages to the address and data pins. Proper handling and electrostatic discharge (ESD) protection are essential to avoid damage to the device. The datasheet provides detailed information on the device's electrical characteristics, programming specifications, and erasing procedures. This EPROM is a mature product and may not be recommended for new designs, but it is still used in legacy systems and for replacement purposes.