LTV-817S-TA1 from Lite-On Inc. is an optoisolator in the transistor output class, commonly selected when designers need electrical isolation between low-voltage control circuitry and higher-voltage or noise-prone sections of a system. Parts in this category are widely used in industrial control interfaces, power supply feedback paths, PLC input stages, consumer appliances, and embedded systems that require signal transfer with galvanic isolation. Engineers typically value this type of component for helping improve noise immunity, enhance safety separation, and simplify interface design across mixed-voltage domains. For procurement and design planning, the lifecycle status for LTV-817S-TA1 is currently listed as information not available/unknown, so teams should confirm current production status directly with Lite-On Inc. or authorized distribution before committing to long-term builds. RoHS compliance information is also not available from the provided data and should be verified through the latest manufacturer datasheet, compliance certificate, or distributor documentation.