Semiconductor DG181 thru DG191 High-Speed Drivers.
DG181 - High-Speed Drivers with Dual SPST JFET Switches
DG181 - High-Speed Drivers with JFET Switch
3DG181 - NPN Silicon High Reverse Voltage High Frequency Middle Power Transistor
3DG1815 - SILICON NPN TRANSISTOR
3DG1815M - SILICON NPN TRANSISTOR