The 3DFN64G08VS4309 from 3D Plus is a Space Qualified Memory with Storage Capacity 4 Gb, Read Access Time 25 ns, Write Access Time 230 to 700 us, Bit Size 4 x (2G x 8 Bits), Radiation Dose 80 krad(Si) (Read Mode), 25 krad(Si) (Write Mode). Tags: Surface Mount. More details for 3DFN64G08VS4309 can be seen below.