The SN74CBT3383C features a low propagation delay or t_pd that works great for multiple rail information transfer (for example, from 1A1 to 1B1 and 1A2 to 1B2). However, the SN74CBT3383C also features BUS exchange functionality, which allows for bidirectional data transfers from the inputs and outputs connected on the B side. By enabling the BX pin, the outputs are now crossed or exchanged. Data can now flow from 1A1 to 1B2 and 1A2 to 1B1 with little to no propagation delay. This can be used to enable byte swapping of buses within a system or to create a 5-wide, 2-to-1 multiplexer.