The DM28C256-250 is a 256K (32K x 8) CMOS EEPROM (Electrically Erasable Programmable Read-Only Memory) manufactured by SEEQ Technology. EEPROMs are non-volatile memory devices that can be electrically erased and reprogrammed, offering flexibility in data storage and modification. The "-250" suffix indicates an access time of 250 nanoseconds.

Applications

• Embedded systems: Storing configuration data, calibration parameters, and firmware.
• Industrial controls: Storing program code and machine settings in programmable logic controllers (PLCs).
• Data logging: Recording sensor readings and other data in remote monitoring systems.
• Telecommunications equipment: Storing network configurations and routing tables.
• Consumer electronics: Storing user preferences and game data in set-top boxes and gaming consoles.

Features

• 256K (32K x 8) Memory Organization: Stores 262,144 bits of data organized as 32,768 bytes.
• CMOS Technology: Low power consumption.
• Electrically Erasable and Programmable: Data can be erased and reprogrammed electrically.
• Fast Access Time: 250 nanosecond access time for quick data retrieval.
• Byte Alterable: Allows individual bytes to be erased and programmed without affecting other data.
• JEDEC Standard Pinout: Compatible with other standard EEPROMs.

Benefits

• Non-Volatile Storage: Retains data even when power is removed.
• Reprogrammability: Allows for easy updates and modifications to stored data.
• Low Power Consumption: Suitable for battery-powered applications.
• Fast Access: Enables real-time data access in performance-critical applications.
• Flexibility: Byte alterability provides granular control over data storage.

Additional Details

The DM28C256-250 typically operates on a single 5V power supply. It supports both page and byte write modes. The endurance, or the number of erase/write cycles the memory can withstand, is typically in the range of 10,000 to 100,000 cycles per byte. The device is often available in a 28-pin DIP (Dual In-Line Package) or a surface-mount SOIC (Small Outline Integrated Circuit) package. It features TTL-compatible inputs and outputs. Consult the manufacturer's datasheet for specific timing diagrams, voltage levels, and programming algorithms.