The AT27C512R-25DI is a high-performance 512K (64K x 8) read-only memory (ROM) chip manufactured by Microchip Technology. This ROM chip features a 250ns access time, making it suitable for applications requiring fast read access, such as embedded systems, gaming consoles, and industrial control systems. The AT27C512R-25DI employs a low-power CMOS technology, offering low standby current consumption and high reliability. It operates with a single 5V power supply and has a 200mA maximum current consumption during a read operation. This ROM chip is housed in a 28-pin dual in-line package (DIP), providing ease of use and compatibility with standard socketed systems. Its industry-standard pinout layout allows for drop-in compatibility with existing designs. With its high-speed performance, low power consumption, and reliable operation, the AT27C512R-25DI is an ideal choice for developers seeking a high-density ROM solution for their applications.