The UPD28C256CZ-20 is a CMOS Electrically Erasable Programmable Read-Only Memory (EEPROM) manufactured by NEC. EEPROMs are non-volatile memory devices that can be electrically erased and reprogrammed, allowing for flexible data storage and updates.

Applications

• Embedded Systems: Storing configuration data, calibration parameters, and firmware in embedded systems.
• Industrial Control Equipment: Storing program code and operating parameters in industrial controllers and machinery.
• Automotive Electronics: Used in engine control units (ECUs) and other automotive systems for storing calibration data and software updates.
• Consumer Electronics: Storing user settings and firmware in devices such as set-top boxes, DVD players, and printers.
• Networking Equipment: Storing configuration data and firmware in routers, switches, and other network devices.

Features

• 256Kbit (32KB) Memory Capacity: Provides 256 kilobits of non-volatile storage.
• CMOS Technology: Offers low power consumption, making it suitable for battery-powered applications.
• Electrically Erasable and Programmable: Allows for easy data updates and reprogramming without the need for UV light.
• Fast Access Time (200ns): The "-20" likely indicates an access time of 200 nanoseconds, suitable for many applications.
• Byte-Alterable: Individual bytes can be erased and programmed, offering flexibility in data management.

Benefits

• Flexible Data Storage: EEPROM technology allows for easy data updates and reprogramming, making it suitable for applications where data changes frequently.
• Non-Volatile Memory: Data is retained even when power is removed, ensuring that critical information is not lost.
• Low Power Consumption: CMOS technology minimizes power usage, making it suitable for battery-powered devices.
• Ease of Use: Electrical erasing and programming simplifies the development and maintenance of embedded systems.

This EEPROM is suitable for applications requiring non-volatile storage with the ability to update data easily. Further details, such as operating voltage, programming voltage, and package type, can be found in the official NEC datasheet. The 200ns access time makes it suitable for a broad range of applications where speed is important.