The X28HC256DI-70 is a 256 Kbit (32K x 8) High-Speed CMOS EEPROM (Electrically Erasable Programmable Read-Only Memory) manufactured by Xicor (later acquired by Intersil and then Renesas). It's designed for applications requiring non-volatile storage with in-system programmability and fast access times.

Applications:

• Embedded systems requiring non-volatile memory
• Industrial control equipment
• Data logging applications
• Storage of calibration data
• Configuration storage in networking devices

Features:

• Memory Type: EEPROM (Electrically Erasable Programmable Read-Only Memory).
• Capacity: 256 Kbit (32K x 8 bits).
• Access Time: 70 ns (nanoseconds). The '-70' in the part number indicates the access time.
• Voltage: Typically operates at 5V.
• Endurance: High endurance, typically 100,000 erase/write cycles per byte.
• Data Retention: Long data retention, typically 10 years.
• Interface: Standard parallel interface.

Benefits:

• Non-Volatile Storage: Retains data even when power is removed.
• Electrically Erasable: Can be erased and reprogrammed electrically, allowing for easy updates without removing the device from the circuit.
• High Speed: 70ns access time allows for quick data retrieval.
• High Endurance: Can withstand a large number of erase/write cycles.
• Long Data Retention: Retains data for a long period of time.

Additional Details:

The X28HC256DI-70 features a page write mode for faster write operations. It commonly comes in a DIP (Dual In-line Package) or SOIC (Small Outline Integrated Circuit) package. It is a CMOS device, meaning it offers low power consumption compared to older NMOS EEPROMs. Refer to the Xicor datasheet for precise timing specifications, programming voltage requirements, and other electrical characteristics. The 'DI' suffix likely indicates a specific package type or temperature range.