NM24C03N

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The NM24C03N is an integrated circuit from STMicroelectronics that can store up to 2,000 bytes of non-volatile memory. It is based on N-channel MOS (Metal-Oxide-Semiconductor) technology and is designed to operate in a wide voltage range, from 4.5 volts to 5.5 volts. This chip is commonly used in a variety of embedded systems, such as microcontrollers, consumer electronics, and medical instruments.

NM24C03N belongs to the field of non-volatile memory ICs. These ICs offer the advantages of low power consumption and the ability to store data even when the power is turned off. That makes this chip particularly useful for storing settings and other parameters, especially in scenarios where the system needs to start up quickly from a “clean slate”, resetting itself as required.

The NM24C03N features three address pins – A0, A1, and A2 – allowing it to access up to eight independent 128-byte pages. Data is accessed from the chip in 8-bit words, with the upper three bits used for addressing. Data is stored in each page in sequential 8-bit word locations.

The NM24C03N is controlled through an SPI-like protocol, using a single-byte command structure. The command structure consists of a “Start” bit, followed by a “data-out” bit, an “acknowledgement” bit, and finally a “stop” bit. This protocol allows the NM24C03N to receive commands from the host system and acknowledge their receipt.

The NM24C03N also has a 4-bit write protect pin, which provides a simple method of locking data in the memory without requiring additional circuitry. This allows the system to prevent accidental changes to the stored data.

The NM24C03N is an incredibly useful chip for many embedded system needs. It offers low power consumption, the ability to store data even after power is removed, and integrated write-protection. Combined with its SPI-like control protocol, the NM24C03N is an excellent choice for many applications.

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