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The 25xx010A, 25xx020A and 25xx040A devices are what Microchip claims to be the world's first SPI serial EEPROMs in a miniature, SOT-23 package. The chips extend the company's product line into high-speed, low-density applications. In addition to the SOT-23, the devices are available in a 2x3 mm DFN package, as well as all standard packages. They were developed using Microchip's PMOS Electrically Erasable Cell (PEEC) technology. The 25AA010A and 25LC010A EEPROMs provide 1kbit of memory density, the 25AA020A and 25LC020A provide 2kbit, and the 25AA040A and 25LC040A offer 4kbit - all capable of speeds up to 10MHz.