AT28C256-15UM/883-815

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Memory is a key component of almost all electronic devices, providing essential data storage and processing power. In most applications, memory is used to read and write data, store a short-term history of data, or simply to retain information that might be lost if the device is shut down. This article will focus on the features and working principles of AT28C256-15UM/883-815, a type of memory unit.

AT28C256-15UM/883-815 is a non-volatile memory unit with a 24-pin DIP and a 44-pin TSOP2 package. The unit is designed for use in a variety of applications and data storage applications, with a wide operating voltage (1.8V to 5.5V). It features a fast access time (15ns) and high operating temperature range (-40C to +85C). The unit also offers advanced write protection, including write protect and write disable.

The unit utilizes the latest technology in non-volatile memory, with a capacity of up to 32K words of data (16K bytes). It is organized in a hierarchical memory system with 16 separate pages. Each page can store up to 2048 words of data (1K bytes). The unit has 8-bit wide data bus and tri-state ouputs. The memory unit can be addressed and accessed in two ways: firstly, it can be addressed through its full range (0x0000-0x7FFF), or secondly, it can be addressed in page mode, where data can be accesses in blocks of 1K bytes.

The features of AT28C256-15UM/883-815 provide substantial benefits when compared to other traditional memory devices. Its voltage range from 1.8V to 5.5V allows it to function in a variety of applications, particularly those in industrial and automotive settings, where power supply voltages can vary drastically. Its fast access time allows for quick data read and write operations, meaning applications involving real-time data acquisition and handling can be implemented quickly and efficiently. The ability to access data in blocks of 1K bytes can make data access a more organized and efficient process. Finally, its write protect and write disable features add an extra layer of security to data stored in the device.

In terms of its working principles, AT28C256-15UM/883-815 uses a set of dedicated control signals that control data read and write operations. Read operations are carried out by activating the HQ (#0), CS1 (#1) and RD (#2) signals. When these three signals are active, the chip sends data on the D0-D7 lines that corresponds to the address on the address bus. Write operations, on the other hand, are carried out by activating the HQ (#0), CS1 (#1), WR (#3) signals, and sending the data on the D0-D7 line.

In summary, AT28C256-15UM/883-815 is a powerful non-volatile memory unit designed for use in a variety of applications. Its voltage range and fast access time makes it an ideal choice for applications involving real-time data acquisition and handling. Its write protect and write disable features offer additional security for data stored in the device. The unit’s ability to access data in blocks of 1K bytes can streamline data access operations. All in all, its features and working principles make it an excellent choice for most memory applications.

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