6N137(DIP8) 6N137(F) 6N137(F)-TOS 6N137(LF1，F) 6N137(QTC)(DIP8) 6N137(S)(T1) 6N137(SL)(T1) 6N137(SL)(T1)-GV 6N137(SOP8) 6N137(TP1.F)