The AM27256-35/BXA is a 256K-bit (32K x 8) Electrically Programmable Read-Only Memory (EPROM) manufactured by AMD. This EPROM is designed for storing firmware, program code, and other non-volatile data in various embedded systems. The '-35' in the part number indicates an access time of 350 nanoseconds.

Applications:

• Embedded Systems: Storage of firmware, boot code, and application code in microcontrollers, microprocessors, and embedded computers.
• Industrial Control: Storage of configuration settings, control algorithms, and machine parameters in industrial automation equipment.
• Telecommunications: Storage of system software and configuration data in telecommunication devices.
• Instrumentation: Storage of calibration data, test routines, and program code in test and measurement instruments.
• Consumer Electronics: Storage of firmware and game code in older gaming consoles and electronic devices.

Features:

• 32K x 8 Organization: Stores 32,768 bytes of data, organized as 32,768 words of 8 bits each.
• Fast Access Time: 350 nanosecond access time ensures quick retrieval of stored data.
• Electrically Programmable: Can be programmed electrically using a PROM programmer.
• Erasable: Can be erased by exposure to ultraviolet (UV) light.
• Three-State Outputs: Allows multiple devices to share the same bus.
• TTL Compatible: Directly interfaces with TTL logic circuits.
• Single 5V Supply Operation: Operates from a single 5V power supply.

Benefits:

• Non-Volatile Storage: Retains stored data even when power is removed.
• Easy Programming: Can be programmed using readily available PROM programmers.
• Reprogrammable: Can be erased and reprogrammed, allowing for firmware updates and modifications.
• Fast Access Time: Enables fast data retrieval, improving system performance.
• Wide Operating Temperature Range: Suitable for use in a variety of environments.
• Industry Standard: Widely used and supported, ensuring availability and compatibility.

Additional Details:

The AM27256-35/BXA is typically packaged in a 28-pin ceramic DIP (Dual In-line Package) with a quartz window for UV erasure. The device requires a 5V power supply for operation. Programming typically requires a higher voltage, such as 12.5V. Detailed programming and erasure instructions can be found in the device's datasheet. This EPROM is suitable for applications requiring moderate storage capacity and fast access times.