The TD27C256-20 is a CMOS Erasable Programmable Read-Only Memory (EPROM) manufactured by various vendors, including Rochester Electronics. It is a non-volatile memory that can be electrically erased and reprogrammed. The '-20' in the part number suggests a faster access time, likely 200ns, compared to the TD27C256-25. This EPROM is designed for use in embedded systems, firmware storage, and other applications that require non-volatile storage with the ability to update the stored data.

Applications:

• Embedded Systems: Ideal for storing firmware and program code in embedded systems requiring fast access times.
• Industrial Control Systems: Used in industrial control equipment where quick retrieval of configuration data and control programs is essential.
• Computer Peripherals: Utilized in devices like printers, scanners, and network adapters to store firmware.
• Telecommunications: Employed in telecommunications equipment for storing configuration and control information.
• Automotive Electronics: Used in automotive systems to store engine control software and other critical data requiring fast access.

Features:

• 256Kbit Capacity: Provides 256 kilobits (32 kilobytes) of storage capacity.
• CMOS Technology: Leverages CMOS technology for low power consumption and high noise immunity.
• Erasable and Reprogrammable: Can be erased using ultraviolet light and reprogrammed electrically, allowing for updates and modifications.
• Fast Access Time: Features a 200ns access time for rapid data retrieval.
• Non-Volatile Memory: Retains stored data even when the power supply is removed.
• JEDEC Standard Pinout: Adheres to JEDEC standard pinout configurations for ease of integration and interchangeability.

Benefits:

• Flexibility: Enables easy updating and modification of stored firmware or program code.
• Low Power Consumption: Reduces overall system power consumption, extending battery life in portable applications.
• Reliable Data Storage: Provides reliable and stable non-volatile data storage for critical information.
• Improved System Performance: Faster access time enhances system performance by reducing latency in data retrieval.
• Industry Standard: Complies with industry standards for compatibility and ease of integration.

Additional Details:

The TD27C256-20 typically operates with a 5V power supply. Erasing the memory requires exposure to ultraviolet light through the quartz window on the package. Programming is done by applying specific voltage levels to the address and data pins. Detailed specifications include supply voltage range, operating temperature range, and programming parameters. Always refer to the manufacturer's datasheet (such as Rochester Electronics) for precise electrical specifications and programming instructions. This EPROM is well-suited for applications where fast access times are critical and firmware updates are necessary.