24AA256T-I/ST Integrated Circuits (ICs)

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Memory: 24AA256T-I/ST Application Field and Working Principle

The 24AA256T-I/ST is a memory device produced by Microchip Technology Incorporated (MTA). It offers 256Kbits (32 Kbytes) Endurance of 1 Million Program/Erase Cycles, 100,000 Minimum. It also has a manufacturer-specified data retention of at least 10 years at 25°C. The 24AA256T-I/ST is well-suited for use in applications such as low-power embedded or industrial applications.

Application Field

The 24AA256T-I/ST is suitable for many different applications because of its small size, ample memory capacity and wide operating voltage range (1.8V to 5.5V). Some of the most common applications are:

• Industrial Control & Automation Systems
• Data Logging
• Metering & Instrumentation
• Consumer & Other Products

It is also suitable for automotive applications since it features low power consumption, wide operating temperature range of -40°C to 85°C, multiple configuration options, an extended product life (1 million cycles) and an industry-standard Serial Peripheral Interface (SPI) compatible protocol.

Working Principle

The 24AA256T-I/ST memory device uses the Serial Peripheral Interface (SPI) compatible protocol to communicate with the host microcontroller. This protocol supports a three-wire interface for bi-directional data communication between the host and the memory device. It has a master/slave configuration in which the microcontroller acts as the master and the memory device acts as the slave. The memory device can be accessed over the SPI bus by using 8-bit ‘instructions’ (write, read, etc.) or 16-bit ‘addresses’.

The 24AA256T-I/ST is organized into 8 ‘pages’ of 256 bytes each. The memory device can be written to and read from in either page mode or byte mode. In page mode, data is written and read in blocks of 256 bytes (1 page). In byte mode, data can be written and read one byte at a time.

The 24AA256T-I/ST features hardware write protection, which allows the user to select between either a full memory write protection or a partial memory write protection. In full memory write protection mode, the entire memory (32 Kbytes) is protected from inadvertent writes. In partial memory write protection mode, the user can select which memory blocks or ‘pages’ to protect from writes. The 24AA256T-I/ST also features an optional hardware write-back protection which can be used to protect the contents of a page from being overwritten.

The 24AA256T-I/ST also features a chip enable (CE) pin which can be used to select between two different memory blocks or ‘pages’. This feature allows the user to divide the memory into two separate memory blocks to further reduce power consumption and/or improve memory throughput.

Conclusion

The 24AA256T-I/ST is a low-power, embedded memory device that is suitable for a wide range of applications. It features a Serial Peripheral Interface (SPI) compatible protocol for data communication between the host and the memory device. Its small size, wide operating voltage range and extended product life make it ideal for industrial control and automation systems, data logging, metering & instrumentation, and consumer & other products.

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