AT28C64E-25SC

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AT28C64E-25SC Application Field and Working Principle

Memory is a vital component in computer design and lies at the heart of all electronic circuits. AT28C64E-25SC, a type of non-volatile memory component, is a 64Kb serial access, electrically erasable programmable read-only memory referred to as EEPROM. This device from the family of Atmel AT28Cxx products is capable of storing 64 kilobits of data and is available in 4.5 to 5.5 volt varieties.

Application Field
AT28C64E-25SC is a serial EEPROM device and hence can be used in various applications that require large memory storage space. Whether it is genuine data storage and readback, code storage and execution, or parameter storage and manipulations, this device can effectively serve the purpose.

Examples of applications in which AT28C64E-25SC is commonly used are:

• Computer or microcontroller bootcodes
• Automotive electronics
• Software codes
• Entertainment systems
• Personal digital systems
• Data logging applications
• Medical instrumentations

Working Principle
AT28C64E-25SC offers a 64Kbit of EEPROM which can be read, programmed and erased electrically. The device can be accessed data serially using the Serial Data Input pin and the Serial Data Output pin. AT28C64E-25SC has an inbuilt control logic connected to the chip-enable and the output enable pins that can be used to control the read and write operations. Apart from these, there are other pins like the program and the erase pins which are used to control the program and erase operations respectively.

The memory of the AT28C64E-25SC is grouped into 8-Kbyte blocks known as “sectors” which can be selectively erased or programmed while the data stored in the memory is kept. The programming of the memory can be done through the three-pin serial interface or alternatively the four-pin byte mode. The byte mode enables sequential byte-by-byte programming of the data into the memory.

The device can be written and re-programmed for a minimum of 1000 times during its lifetime. However, the write/erase operations time should not exceed the recommended time as mentioned in the datasheet.Besides these, the temperature should be maintained within the range as specified in the device’s datasheet in order to avoid irreversible damage due to static discharge.

In conclusion, the AT28C64E-25SC is a versatile, low power, and reliable non-volatile memory component for controlling various applications. It has the advantages of being re-programmable and offering a wide range of operating voltages.

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