Patent ID: 7053679

Claim:
An output driver for a semiconductor device, the output driver comprising: a first pre-driver receiving a first signal so as to output a second signal in which a slew rate is controlled, wherein the first pre-driver comprises: a CMOS inverter for receiving the first signal, a pulse generating circuit for receiving the first signal to output a pulse signal having a constant width, a first control section for receiving the pulse signal outputted from the pulse generating circuit, and a second control section which is turned on and/or off by a control signal outputted from the first control section, wherein the second control section is positioned between a power supply voltage and an output end of the CMOS inverter, wherein the second signal represents an output signal outputted through the output end of the CMOS inverter, wherein the first and the second control section are sequentially enabled by the pulse signal generated from the pulse generating circuit, and wherein the power supply voltage is supplied to the output end when the second control section is enabled, a second pre-driver receiving a third signal so as to output a fourth signal in which a slew rate is controlled; and a pull-up transistor and a pull-down transistor connected in series between a power supply voltage and a ground voltage, wherein the pull-up transistor is turned on and/or off by the second signal, and the pull-down transistor is turned on and/or off by the fourth signal.