data 5d5D optical data storage (also branded as Superman memory crystal, [1] a reference to the Kryptonian memory crystals from the Superman franchise) is an experimental nanostructuredMarking: 5D. Part #: BAS516. Package: SOD-523. Datasheet: 188Kb4P. Manufacturer: Galaxy Semi-Conductor Holdings Limited. Description: Hh Speed Switching Diode. 202