The PI5C3390 and PI5C32390 are 16-to-8 multiplexer/ demultiplexer bus switches with a low ON resistance allowing inputs to be connected directly to outputs. The two enable inputs connect each of eight I/O to the common I/O pin. This multiplexer function can be used to select and route logic signals to form crossbar switches, isolate bus capacitance, or provide a zero delay switch connection. The bus switch creates no additional ground bounce noise or additional propagation delay. The PI5C32390 is designed with an internal 25 resistor reducing noise reflection in high-speed applications.