Level shifting circuitry and corresponding enable signal generating circuitry provides improved leakage current control while eliminating the need for supplying reference voltage input in the enable signal generator. The level shifting circuitry is a type of cascode free level shifting circuit that does not include cascode transistors as in the prior art but instead utilizes cross coupled logic to provide level shifting while also utilizing enable signal controlled transistors to control leakage current through the cross coupled logic during power up sequencing. The level shifting circuitry provides improved leakage current limiting structure for power up sequencing whether a lower level supply voltage ramps up faster than the higher level supply voltage or vice a versa.