Patent ID: 7218150

Claim:
A semiconductor integrated circuit device comprising: an output driving circuit having a first and second differential output nodes connected to a first and second external output terminals, respectively; and a capacitance connection circuit connected between the first and second differential output nodes, the capacitance connection circuit comprising: a capacitor connected between the first and second differential output nodes, the capacitor having a capacitance configured for adjustment according to a control signal, the capacitor adjusting a slew rate of an output signal of the output driving circuit; a plurality of capacitors each having one end and an other end; a plurality of first switch elements each having one end and an other end, the one end of each first switch element being connected to the first differential output node, the other end of each first switch element being connected to one end of a corresponding one of the plurality of capacitors; a plurality of second switch elements each having one end and an other end, the one end of each second switch element being connected to the second differential output node, the other end of each second switch element being connected to the other end of a corresponding one of the plurality of capacitors; and a switch control circuit which receives a control signal to select from the plurality of first and second switch elements on the basis of the control signal and perform such control as turns on the selected switch elements.