Patent ID: 7505346

Claim:
A semiconductor integrated circuit, comprising: a pair of data output units each having a complementary data line pair and outputting data to one of the data lines which are precharged to a reference voltage; a complementary coupling wire pair; a differential amplifier coupled to the coupling wire pair and amplifying a voltage difference in the coupling wire pair; amplifier switches coupling the coupling wires to the data lines respectively; and a switch control unit outputting amplifier switch control signals controlling operations of the amplifier switches respectively, wherein when one of the data output units outputs data to one of the data line pair, the switch control unit turns on by the amplifier switch control signals a pair of amplifier switches coupled to the data line pair of the data output unit which outputs data, and turns on the amplifier switch coupled to the data line, which corresponds to the other of the data line pair coupled one of the data output units, in the data output unit which does not output data during a period after the one of the data output units outputs data until the differential amplifier starts an amplifying operation.