an output node pad the compensated output driver 202 drives a load capacitance c l in response to signals at nodes pd and nd the compensated output driver 202 consists of a pull up driver section and a pull down driver section the pull up driver drives the output node pad in response to a signal at the node pd and the pull down driver section drives the output node pad in response to a signal at the node nd the compensation codes compp n 0 and compn n 0 are used to compensate current driving capability of the output driver 202 against pvt variations the compensated pull up slew rate controller 204 is connected between nodes a and the node pd the driving node for the pull up driver the compensated pull up slew rate controller 204 controls the pull up slew rate of the output driver 202 when output makes a transition from 0 to 1 the compensation codes compp n 0 are used to generate control signals in the pull up slew rate controller 204 the compensated pull down slew rate controller 206 is connected between nodes a and the node nd the driving node for pull down driver the compensated pull down slew rate controller 206 controls the pull down slew rate of the output driver 202 when output makes a transition from 1 to 0 the compensation codes compn n 0 are used to generate control signals in the pull down slew rate controller 206 fig3 illustrates the schematic circuit diagram of a generic compensated pull up slew rate controller described in fig2 the compensated pull up slew rate controller 204 includes an inverter.