If you are looking for the difference between part numbers FEMDNN064G-A3A56 and FEMDNN064G-A3A55 from Lexar Enterprise, please refer to the manufacturer’s response below:
Both FEMDNN064G-A3A56 and FEMDNN064G-A3A55 use the same brand of controller and flash supplier. However, the NAND flash version used in each part is different.
FORESEE eMMC FEMDNNXXXG-A3A56 Datasheet (2.1 MB)
Applicable Part Number
5110-FEMDNN064G-A3A56-ND
5110-FEMDNN064G-A3A56
5110-FEMDNN064G-A3A55-ND
5110-FEMDNN064G-A3A55