The AM27S21A/BEA is a high-speed 2048-bit (256 x 8) bipolar PROM (Programmable Read-Only Memory) manufactured by AMD. This PROM is designed for applications requiring rapid data access and reliable storage. It utilizes advanced bipolar technology to achieve exceptional speed and performance.

Applications

• Microprogram Storage: Used in control units of computers and digital systems to store microcode for instruction execution.
• Look-Up Tables: Implemented in various applications for fast data retrieval and function mapping.
• Code Conversion: Employed to translate from one code to another in digital systems.
• Character Generation: Utilized for storing character fonts in display systems.
• Sequential Logic Circuits: Used as memory elements in sequential logic designs and state machines.

Features

• Fast Access Time: Provides access times in the range of 35-50 ns, enabling high-speed operation.
• Low Power Dissipation: Bipolar technology minimizes power consumption, contributing to energy efficiency.
• Three-State Outputs: Offers three-state outputs for easy memory expansion and bus interfacing.
• Programmable: Can be programmed to store specific data patterns.
• High Reliability: AMD's manufacturing processes ensure high reliability and data retention.
• Organized as 256 x 8 bits: Allowing for byte-wide data storage.

Benefits

• Improved System Performance: Fast access times enhance overall system performance by reducing memory access latency.
• Reduced Power Consumption: Low power dissipation leads to lower operating costs and reduced heat generation.
• Easy System Integration: Three-state outputs simplify memory expansion and interfacing with other system components.
• Design Flexibility: Programmability provides flexibility to customize memory content for specific applications.
• Increased System Reliability: High reliability ensures data integrity and reduces the risk of system failures.

Additional Details

The AM27S21A/BEA typically operates from a single +5V power supply. It is often available in a 24-pin DIP (Dual In-line Package). Programming is usually done using specialized PROM programmers.