The LTV-814S-A is a part made by Lite-On, a Taiwan-based company. It is a type of optocoupler, a device used to electrically isolate two different circuits. It is a transistor output optocoupler, meaning that it has a photodiode that is used to detect an input signal, and an output transistor for controlling the current flow between the two different circuits. The LTV-814S-A is an 8-pin dual-in-line (DIP) package, meaning that it occupies up to eight pins on a printed circuit board. It is also available in surface-mount (SMD) packages. It has an isolation voltage of 5 kV and a transfer current of up to 80 mA. It is commonly used in industrial, automotive, and consumer applications.