Patent ID: 7847594

Claim:
A data output circuit of a semiconductor integrated circuit, comprising: a plurality of drivers configured to drive data output terminals to a logic level corresponding to levels of input data in response to driving control signals; and a control section configured to activate and output the driving control signals supplied to a first group of the plurality of drivers, and to activate or inactivate and output the driving control signals supplied to a second group of the plurality of drivers, depending upon a level of a supply voltage, wherein the control section comprises: a first control section configured to activate the driving control signals supplied to the first group of the plurality of drivers when first enable signals are activated; and a second control section configured to activate the driving control signals supplied to the second group of the plurality of drivers when the first enable signals are activated and the level of the supply voltage is lower than the preset voltage level, and wherein the second control section comprises: a voltage detection unit configured to activate a voltage detection signal when the level of the supply voltage is lower than the preset voltage level; a second enable signal generation unit configured to activate second enable signals when the first enable signals and the voltage detection signal are activated; and a driving control signal generation unit configured to activate the driving control signals supplied to the second group of the plurality of drivers when the second enable signals are activated.