AT28C256-15UM/883-610

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The AT28C256-15UM/883-610 is an integrated circuit (IC) chip used for memory storage. It is a 28 pin IC memory chip belonging to the AT28 series of chips. It is available in either both a standard or low voltage version, with the low voltage option offered for applications in portable electronic devices.

The chip provides non-volatile storage capacity of 32Kx8bits or 32,768 bytes of static RAM. It has an operating temperature range of 0°C to +70°C, and a storage temperature range of -55°C to +125°C and a voltage range of 2.7V to 5.5V, making it suitable for a wide range of applications.

The AT28C256-15UM/883-610 is suitable for use in applications such as video games, consumer electronics, computer peripherals, industrial automation systems, storage systems, and robotics. It is a relatively straightforward chip to use and offers a fast access time of 150ns, meaning it can be used in applications needing quick response times. The chip is resistant to many common environmental stress factors, making it more reliable for applications where it is subjected to frequent rough handling as well as in harsh conditions.

The chip works by utilizing two methods of power supply operation. The first is through the system supply Vcc which provides the power needed for the chip to operate. This is usually +5V or +3.3V for general purpose electronics. The second power source is the "background Vcc" which is used to store the data even when the power is not applied. The combination of the two supplies enables the chip to maintain its contents.

The chip is made up of 256 rows of 32 bytes, allowing it to store a maximum of 8,192 words of data. Data is stored using the 16-bit instruction format with the address, the command and the 8-bit write data. The write enable signal is used to manage the read and write functions during operation and the chip has a pin specifically used for monitoring the status of the write enable (WE) signal.

The chip is also able to process serial input and output data, meaning that it can exchange data onto the system bus. This is done via the SO pin, which is used to transmit data out of the chip, and SI, which is used to receive data from the system bus. This serial data exchange is usually used for communications between two chips of the same type.

The AT28C256-15UM/883-610 offers a reliable chip for many applications and is designed to be used in a number of settings. Its low-level voltage, wide temperature range and fast access time make it suitable for use in a variety of situations, while its resistance to environmental stress means it provides a reliable storage solution in even the toughest of environments.

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