Patent ID: 7282968

Claim:
A data output driver, comprising: a rising transition slope adjuster including a plurality of first delay units cascade-connected to each other and receiving data and generating delayed data, each of the first delay units having a delay time which varies in response to a first control signal; a falling transition slope adjuster including a plurality of second delay units cascade-connected to each other and receiving inverted data and generating delayed inverted data, each of the second delay units having a delay time which varies in response to a second control signal; a pull-up driver including a plurality of pull-up circuits, the driving capabilities of the pull-up circuits being adjustable in response to a third control signal, each pull-up circuit pulling-up output data in response to each of the data and the delayed data of the first delay units; and a pull-down driver including a plurality of pull-down circuits, the driving capabilities of the pull-down circuits being adjustable in response to a fourth control signal, each pull-down circuit pulling-down output data in response to each of the inverted data and the delayed inverted data of the second delay units, wherein the first control signal varies in response to the third control signal, and wherein the second control signal varies in response to the fourth control signal.