Advanced Micro Devices, Inc. AM27C256-200DC CMOS EPROM

Advanced Micro Devices AM27C256-200DC CMOS EPROM is a 256-kilobit, non-volatile memory device used to store firmware and code for microprocessor-based systems. As a CMOS EPROM, it retains data without power and is intended for applications where code needs to be preserved between power cycles. The -200DC suffix indicates a 200-nanosecond access time class, offering relatively fast reads for firmware retrieval in development and production environments. Manufactured by AMD, the AM27C256-200DC is designed for standard EPROM programming workflows and provides compatibility with common equipment used to write and verify ROM content. Common applications include firmware storage, boot code, and initialization data in embedded electronics where a compact, dedicated memory block is needed for reliable code retention.