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24AA025E64-I/SN Application Field and Working Principle

The 24AA025E64-I/SN is a memory semiconductor device from Microchip Technology that is a member of its Serial EEPROM family. It offers 256Kbits of serial EEPROM non-volatile memory that is organized with 256K bits of 8-bit words. The 24AA025E64-I/SN has the ability to work with a single power supply of 1.8 to 5.5V, making it ideal for low-power, low-voltage applications. It also includes a self-timed write cycle and supports hard-coded write protection and device-level write protect.

Overview

The 24AA025E64-I/SN is a SPI-specific device with a 2-wire bidirectional Serial Peripheral Interface (SPI) compatible communication interface. The 24AA025E64-I/SN requires an external clock signal (serial clock or SCLK) and a chip select signal, along with an optional write protect signal. Additionally, the device requires two control signals, write protect (WP) and hold (HOLD), which can be used to pause the SPI communication.

The 24AA025E64-I/SN is an 8-lead Serial EEPROM device that provides a simple, cost-effective solution for low-voltage, low-power applications. The device offers 256Kbits of electrically erasable read/program memory organized as 32,767 words. Each word contains 8 bits. It also includes a self-timed write cycle, supports hard-coded write protection, and device-level write protect.

Applications

The 24AA025E64-I/SN is designed and optimized for a variety of applications, such as rugged industrial, medical, and automotive applications. As a result, this device is suitable for a wide range of challenging industrial, medical, and automotive uses.

The 24AA025E64-I/SN can also be used in a variety of consumer, computer, and communications applications, such as personal digital assistants, cell phones, notebook computers, servers, and data storage and archiving.

Working Principle

The 24AA025E64-I/SN utilizes the SPI serial interface protocol, which allows the device to communicate with a synchronous serial interface with separate clock and data pins. This protocol is simple to implement and provides true bi-directional data flow. A device-level write protect (WP) feature is provided for write protection for the entire device.

The SPI protocol requires a chip select (CS) signal, a serial clock (SCLK) signal, an input data signal, and an output data signal. The SCLK signal is used to transfer data between the device and the controller. Data is transferred on the rising edge of the SCLK signal.

The 24AA025E64-I/SN also provides a write state machine that initiates and controls the write cycle. The write state machine provides a write-protect feature that prevents inadvertent write operations. The write-protect feature can be enabled by programming a byte in a specific address.

Conclusion

The 24AA025E64-I/SN is a memory semiconductor device from Microchip Technology that is ideal for low-power, low-voltage applications. It offers 256Kbits of serial EEPROM non-volatile memory with a single power supply of 1.8 to 5.5V. It uses an SPI serial interface protocol with a chip select, serial clock, input data, and output data signal, which allows for true bi-directional data flow. Additionally, the device includes a write-protect feature that prevents inadvertent write operations as well as a write state machine for chip-level write protection.

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