the el817 sreies contains a infrared emitting diode optically coupled to a phototransistor. it is packaged in a 4-pin package and available in wide-lead spacing and smd option

　　applications:

　　(1).computer terminals

　　(2).system appliances,measuring intruments

　　(3).registers,copiers,automatic vending machines

　　(4).cassette type recorder,

　　(5).electric home appliances,such as fan heaters,etc.

　　(6).signal transmission between circuits of different potentials and impedances