The 3DMR10M40VS5688 from 3D Plus is a Space Qualified Memory with Storage Capacity 256 Mb, Read Access Time 35 ns, Write Access Time 35 ns, Bit Size 2 x (128k x 40 Bits), Radiation Dose 80 krad(Si) (Read Mode), 25 krad(Si) (Write Mode). Tags: Surface Mount. More details for 3DMR10M40VS5688 can be seen below.