The 3DSD1G16VS2494 from 3D Plus is a Space Qualified Memory with Storage Capacity 64 Mb, Bit Size 64 Mbit 16-Bit, 32 Mbit 16-Bit, Radiation Dose 80 krad (Si) (Read Mode), 25 krad (Si) (Write Mode), Mass 2.8 gms, Voltage 3 to 3.6 V. More details for 3DSD1G16VS2494 can be seen below.