An integrated circuit includes a first and a second set of conductive traces. The first set of conductive traces is in a first level and extends in a first direction. The second set of conductive traces is in a second level and extends in a second direction. The second set of conductive traces includes a first conductive trace corresponding to a gate terminal of a first p-type transistor and a gate terminal of a first n-type transistor, and a second conductive trace corresponding to a gate terminal of a second n-type transistor and a gate terminal of a second p-type transistor. The first and second conductive trace are separated from each other in the first direction. The first n-type transistor and the second p-type transistor are part of a first transmission gate. The second n-type transistor and the first p-type transistor are part of a second transmission gate.