25LC256-E/ST

Series:	--
Packaging:	Tube
Part Status:	Active
Memory Type:	Non-Volatile
Memory Format:	EEPROM
Technology:	EEPROM
Memory Size:	256Kb (32K x 8)
Clock Frequency:	10MHz
Write Cycle Time - Word, Page:	5ms
Memory Interface:	SPI
Voltage - Supply:	2.5 V ~ 5.5 V
Operating Temperature:	-40°C ~ 125°C (TA)
Mounting Type:	Surface Mount
Package / Case:	8-TSSOP (0.173", 4.40mm Width)
Supplier Device Package:	8-TSSOP
Base Part Number:	25LC256

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Introduction of 25LC256-E/ST

The 25LC256-E/ST is a 256 Kbit serial-EEPROM memory from Microchip. It is primarily used in the serial electronic devices and products for the purpose of large-capacity storage. The 25LC256-E/ST has a wide range of applications due to its small size, low power consumption, and short-circuit lockout protection. In addition, the 25LC256-E/ST offers fast communication interface, including SPI and I²C. It is mainly used in healthcare and industrial applications as data loggers, switches, temperature sensors, and remote control systems.

Memory category

The 25LC256-E/ST is a serial EEPROM memory which is categorized as non-volatile RAM. Non-volatile RAMs are memory chips which retain data even when they are powered off. It is distinguished from volatile RAMs, which are memory chips which need constant power to retain data. Non-volatile RAMs do not require a power source for data storage, as the data stored in them is stored permanently until explicitly overwritten or erased. Since this type of memory retains data even in a power loss, it can be used in systems which require data to survive temporary power failures.

Application field

The 25LC256-E/ST is primarily used for the purpose of large-capacity storage, often in the serial electronic devices and products. Its broad range of applications can be attributed to its small size, low power consumption and short-circuit lockout protection. Its fast communication interface and the ability to remain energized even in a power failure makes it a suitable choice for medical, industrial and consumer applications.Medical applications include temperature sensors, data loggers and remote control systems. As a temperature sensor, the 25LC256-E/ST can be used to monitor temperature and environment states. And its data logging features enable metabolic and physiological data can be collected and stored conveniently. In addition, it can also be used as a remote control system to execute remote commands and to measure parameters of medical devices. Industrial applications include switches, remote control systems and temperature sensors. Switches and remote control systems are two common industrial applications. The 25LC256-E/ST can be used to control and monitor the various processes in the industrial setting. It can also be used as a temperature sensor and can be used for monitoring temperature, environment states, and data logging.Consumer applications could be heard in mostly consumer electronics and gaming. Consumer Electronics such as smartphones and digital cameras usually carry the 25LC256-E/ST as the main memory chip. It is used to store various information such as settings, user data, or game progress. It is also used to store the programs or applications used in these devices. It can also be used for gaming applications for storing game progress, settings and user profile.

Working Principle

The 25LC256-E/ST memory chip works in a very simple process. It is a serial EEPROM chip, which means that it is connected to the device it’s storing data for via a serial interface. This serial interface can be either SPI or I²C. This allows the device to easily send and receive data from the EEPROM chip, allowing it to store and retrieve data. The 25LC256-E/ST supports two major methods of programming: read/write and erase. During the read/write programming process, the stored data is read from or written to. During erase programming, the stored data is erased. The data is erased by being written to with a 0 (zero). Once the zero is written to the memory cell, the stored data is erased and the memory cell is available for new data. The 25LC256-E/ST also has a broad range of features, such as Short-circuit Lockout Protection, Self-timed Write Cycle, Multiple Write Operations and Hardware Write Protection. The Short-circuit Lockout Protection feature helps to prevent damages from short circuits while the Self-Timed Write Cycle feature ensures that the data stored in the EEPROM is not corrupted during a power failure. The Multiple Write Operations feature allow multiple write operations on the EEPROM and the Hardware Write Protected feature can prevent unauthorized access.

Conclusion

The 25LC256-E/ST is a 256 Kbit serial-EEPROM memory from Microchip. It falls under the memory category of non-volatile RAMs and is primarily used in healthcare, industrial and consumer products. It is mainly used in medical applications such as temperature sensors and data loggers, industrial applications such as switches and remote control systems, and consumer applications like smartphones and digital cameras. The 25LC256-E/ST works in a very simple process via a serial interface, either SPI or I²C, and can be programmed via read/write and erase methods. It also has many important features such as Short-circuit Lockout Protection, Self-timed Write Cycle, Multiple Write Operations and Hardware Write Protection.

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