fod250lsd transistor of datasheet pdf FOD250LSDManufacturer : Fairchild Semiconductor Description : LVTTL/LVCMOS 3.3V High Speed Transistor Optocouplers FOD250LSDManufacturer : FAIRCHILD[Fairchild Semiconductor] Description : LVTTL/LVCMOS 3.3V High Speed Transistor Optocouplers