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Designed for 5volt applications which require large amounts of storage. The Atmel AT45Bxxx dataflash SPI devices can store 2 to 8mbits in an 8pin device. The LM317 provides the 3v volts for the dataflash. The data lines are 5v tolerant and do not require voltage translation. The AT45B carrier has a standard DIP14 footprint which makes it easy to incorporate in any application. A 4mbit dataflash can store 512kb of data . Data is arranged in pages. The 4mbit IC has a page size of 264 bytes. High speed I/O is possible since it has two built in buffers to store data before it is transferred to the flash memory.
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