AT28HC256-70JU

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In the world of memory, the AT28HC256-70JU is a device that is turning heads. This device is a high-density, high-performance CMOS Electrically Erasable Programmable Read-Only Memory (EEPROM). It offers low power consumption, wide operating range, and high endurance.

The AT28HC256-70JU is an 8-pin device that is mounted onto a Printed Circuit Board (PCB). It has an 8-bit address bus and an 8-bit data bus, as well as an enabling signal pin. The device offers 2M-bit of nonvolatile memory, divided into 4 banks of 512-Kbits each. It is organized as 262,144 words by 8-bits.

The AT28HC256-70JU provides nonvolatile memory, allowing data stored in it to persist even when power is turned off. Its advantage is its ability to allow long-term preservation of information in a small package. The device is designed to run between a wide voltage range of 4.5V-5.5V and has two selectable speeds, 88ns and 150ns. It comes with three on-chip control signals; Serial Clock (SCLK), Write Enable (WREN), and Chip Enable (CE) that allow the user to control memory operations.

AT28HC256-70JU is used in various application fields like consumer electronics, automotive equipment, data logging, PC peripherals, and industrial management. It provides an affordable and efficient solution for data storage, transfer, and retrieval. The device is also popularly used in industrial computing systems and other applications, in need of reasonably long-term data storage. The device, with its appropriately low power consumption, makes it suitable in applications that require a high-speed operation, such as medical instrumentation, point-of-sale systems, and mobile phones.

The EEPROM provides simultaneous Read/Write capabilities. A Read operation is initiated by providing the start address in the address register, which contains the address code. Once an address is established, the word present in the address is output to the data lines. After a successful Read operation, the next address location is automatically incremented. This is called the Quick Read mode, which operates at a maximum speed of 88ns.

The Write operation is done by supplying the start address and data to the address register. The Write operation is enabled by a valid Set Condition (WREN) pulse. Once the WREN pulse is issued, the data is written directly into the EEPROM and can be read after a Write Cycle have been completed. It is recommended that a minimum write time of 1.25ms must be provided in order to guarantee the write operation is successful. It is also advised that a programmable timer halt the write cycle, if the EEPROM is not ready for the write operation, before the maximum write cycle expires.

AT28HC256-70JU is an efficient and reliable solution for storing data that needs to be preserved for long-term. Its wide operating range, low power consumption, and high-speed allow the device to be used in various application fields. Its ability to offer a Read/Write operation quickly and efficiently has made the device extremely popular among different users.

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