An embodiment of the invention relates to a T-switch for connecting first, second and third lines and comprising an input section in turn including first, second and third input pass transistors, each connecting a respective line with a first internal node of the T-switch, an output section in turn including first, second and third output pass transistors, each connecting a respective line with a second internal node of the T-switch, and a single buffer stage connected to a first and a second voltage reference and inserted between the first and second internal node.