The PI5C16209 and PI5C162209 are 18-bit bus exchange switches designed with a low ON resistance (5) allowing inputs to be connected directly to outputs. This device operates as a 18-bit bus switch or a 9-bit exchanger, which provides data exchanging between the four signal ports via the data select pins (S0-S2). The PI5C162209 device has a built-in 25-ohm series resistor to reduce noise because of reflections, thus eliminating the need for an external terminating resistor.