PC845 quad channel DC input darlington output Optocoupler by Sharp. Package: 16-DIP ( 4 x PC815 in a block) Download Sharp PC845 .pdf datasheet: Status: NOS (New Old Stock) some in RS.Components sealed foil packaging. Legacy RS Components stock number: RS. 175-211 RoHS compliant: no *** Note chip top side markings are PC815, as these are made in a continuous strip then cut up into singles (PC815), dual (PC825), triples (PC835) and quads (PC845) *** ...still confused, then please see the above provided datasheet which groups them all under the same PC815 product title.