by the following approximate expression by substituting the values 100 ma and 0 88 v for i o and v o1 respectively in this expression we have p wo u2248 0 088 w as described above power consumed in inner elements of an ic can be reduced from 0 088 w to 0 02 w per driving circuit thereof by adding the diode 2 thereto this means that if the rated power consumption of an ic in a package is for example 0 5 w an ic of the present invention can incorporate 25 circuits because 0 5 w u00f7 0 02 w 25 in contrast to the fact that the conventional ic of fig8 can only incorporate 5 circuits because 0 5 w u00f7 0 088 w u2248 5 as described above in case of this embodiment power consumed in the inside of an ic can be substantially reduced by transferring most of power consumed in the conventional ic to an outside diode thereby extra high packaging density of the ic can be achieved fig4 is schematic circuit diagram of an output circuit of an ic employing the circuit of fig1 this ic employs an ic package which has pins respectively corresponding to 16 channels.