AT28C256-15PU

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The AT28C256-15PU is a type of memory which utilizes EEPROM technology (Electrically Erasable Programmable Read-Only Memory). It is designed to provide access to a small amount of data which can be easily modified without being wired directly to the RAM core. As such it is a popular choice for small embedded applications which require reliable and repeatable data storage.EEPROM is a non-volatile memory, meaning that data stored within it does not disappear when power is removed from the system. In this sense, it is similar to a Read-Only Memory (ROM) but with the advantage of being able to be written to and erased. The drawback to EEPROM is that the individual memory cells can only be erased and written to a finite number of times, making it unsuitable for applications which require significant amounts of data to be written or erased.The AT28C256-15PU utilizes this technology to provide 256K bytes of storage, which is suitable for many small embedded applications. It is available in a range of physical packages including DIP, PLCC and SOIC, making it suitable for a variety of mounting and temperature requirements. Additionally, the AT28C256-15PU also includes an enhanced form of protection which prevents accidental programming when power is first applied to the chip. This is an important feature for embedded systems as it reduces the possibility of unexpected results due to faulty programming.The internal architecture of the AT28C256-15PU consists of two distinct parts; the control logic and the memory array. The control logic is responsible for managing the operation of the memory including data read and write operations. The memory array is organized into 1024 x 256 bit blocks and each block can be independently read and write to. The data read and write operations are initiated using a byte-wide instruction register and the data is returned to or written from the memory in 16-bit chunks.The read and write speeds of the AT28C256-15PU are relatively slow compared to other types of non-volatile memory but this is offset by the long-term reliability of the device. The AT28C256-15PU is designed to sustain at least 1000 erasure/write cycles and data retention of at least 10 years, making it a reliable choice for embedded applications where data must be stored for long periods of time with minimal maintenance.In conclusion, the AT28C256-15PU is an excellent choice for small embedded applications where reliable and repeatable data storage is required. Its ability to sustain erasing/writing cycles and prolonged data retention provide a durable solution for applications which require reliable data storage. Additionally, with a range of physical packages available, the AT28C256-15PU can easily be integrated into a variety of projects.

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