LS84 LS840 SOIC 8L LS840 SOIC 8L ROHS LS840 TO-71 6L LS840 TO-71 6L ROHS LS840 TO-78 6L LS840 TO-78 6L ROHS LS841 SOIC 8L LS841 TO-71 6L LS841 TO-71 6L ROHS