25LC320AT-E/ST

25LC320AT-E/ST application field and working principle

25LC320AT-E/ST is a kind of serial EEPROM (Electrically Erasable Programmable Read-Only Memory) from Microchip Technology. It is a nonvolatile memory device along with a chip which can perform read and write operations externally. 25LC320AT-E/ST memory consists of 32K of memory space that can be used to store data and code. It has an access time of 150ns and is designed to operate at voltage levels of 1.8-5.5V.

Features

• 32 Kbit (4K × 8), 16 Kbit (2K × 8 , 16K × 8) and 8 Kbit (1K × 8, 8K × 8) of memory space.
• Access time: 150ns
• Voltage level: 1.8V to 5.5V.
• Gold or Tin plated lead frame package.
• Compatible with the microcontroller and DSP.
• Integrated Lockable Sector Protection (LSP).

Application Field

25LC320AT-E/ST is a 16 Kbit Serial EEPROM device that can be used in a variety of applications. These devices can be used to store data from long time by using less power and are ideal for automotive, industrial, and cybersystem applications.

25LC320AT-E/ST is also used in communication systems and automotive systems such as climate control, engine monitoring, motor control systems, battery management systems and telematics networks.

Working Principle

25LC320AT-E/ST has a simple 3-wire Serial Peripheral Interface SPI which allows a single chip to access the serial EEPROM data. This serial EEPROM device enables random access read and write operations. SPI protocol is used to transfer the data internally. Serial Clock (SCK), Serial Data Input (SI) and Serial Data Output (SO) are all three pins available to perform the data operations.

The SPI in 25LC320AT-E/ST is a hardware-level protocol which uses dedicated logic functions such as serial shifting, shift-out, shift-in, shifts-left etc. to transfer information between the serial EEPROM device and the host controller. Data is transmitted during a single 8-bit transmitted serial cycle on a single communication line.

Conclusion

25LC320AT-E/ST is a 32Kb serial EEPROM from Microchip Technology that offers a good solution for storing data and programs in applications. This device has unique features such as LSP and is ideal for automotive and industrial applications that require high speed and long time data storage capability. It operates at voltage levels of 1.8–5.5V and has an access time of 150ns.