24LC256-E/ST

The 24LC256-E/ST is a 256-kilobit Serial Electrically Erasable Programmable Read-Only Memory (EEPROM). This memory device is mainly used in data storage and embedded applications. It consists of 24 separate 32kx8 memory blocks that are internally connected in parallel. The connection between each block is achieved via the four-wire Serial Peripheral Interface (SPI) bus.

Features

• 256Kbit EEPROM memory
• Dual data rates at 25MHz and 200Kbits per second
• CRCCheck for emulation
• Operates from -40 °C to 85 °C
• Supports SPI signalling
• Internal write protection register
• Serialises 32-byte page writes
• Supports block erase of 32-byte pages
• Reads can be pipelined

Applications

The 24LC256 can be used in a variety of applications, including:

• Data logging
• Smart sensors
• Flat panel displays
• Network equipment
• Data acquisition
• Wireless sensors
• Industrial control systems
• Medical devices and monitors

Working principle

The 24LC256 is an 8-pin memory device that operates with a single supply voltage of +5V. The device supports a Serial Peripheral Interface (SPI) and can transfer data at speeds of up to 25Mbits/s and 200kbits/s. The SPI bus consists of serial data (SDA), serial clock (SCL), chip select (CS) and master out slave in (MOSI). The CS signal is used to select the 24LC256, while the SCL and SDA lines are used to transfer data.

The 24LC256 can read data from its internal memory, as well as write data to it. The device contains 2 write protect pins that can be used to prevent inadvertent write operations. The device is capable of storing up to 64KBytes of data. Each byte of data is stored in an 8-bit location.

The 24LC256 supports two operations: read and write. During a read operation the device will output data from its internal memory when pulsed with the appropriate signals. During a write operation the device will take in data from the external interface, and write it to the designated location in its internal memory. The device supports sequential writes, and can be programmed in 32-byte page format.

Conclusion

The 24LC256 is a versatile memory device that is suitable for a variety of applications. It is easy to use, and supports fast data transfer speeds. The device is capable of reading and writing data, and supports page write and block erase operations. The device offers internal write protection, and has a temperature range of -40 °C to 85 °C. This makes the 24LC256 an ideal choice for data storage and embedded applications.