The EL817 series of devices each consist of an infrared emitting diodes, optically coupled to a phototransistor detector. They are packaged in a 4-pin DIP package and available in wide-lead spacing and SMD option. Applications • Programmable controllers • System appliances, measuring instruments • Telecommunication equipments • Home appliances, such as fan heaters, etc. • Signal transmission between circuits of different potentials and impedances
