Patent ID: 8384444

Claim:
An I/O driver comprising, at least one primary output driver that includes at least one PMOS transistor cascoded with at least one NMOS transistor with an output between the at least one PMOS transistor and the at least one NMOS transistor at least one secondary output driver that includes at least one PMOS transistor having a control gate and being cascoded with at least one NMOS transistor that includes a control gate, wherein the secondary output driver provides an output between the at least one PMOS transistor and the at least one NMOS transistor, the outputs of the primary and secondary output drivers being connected directly to each other to define a common output, wherein each primary output driver is controlled by a pre-driver that includes a NAND gate and a NOR gate, and each secondary output driver is controlled by control means for controlling the secondary output driver, which control means includes a feedback signal from the common output passed to a pair of pass gates, the pass gates being controlled by the pre-driver, the control gate of the PMOS transistor of the secondary output driver being provided with a pull-up transistor, and the control gate of the NMOS transistor of the secondary output driver being provided with a pull-down transistor, the pull-up transistor and pull-down transistor being controlled by said pre-driver.