An RS-485 bus consists of multiple transceivers connecting in parallel to a bus cable. To eliminate line reflections, each cable end is terminated with a termination resistor, R_T, whose value matches the characteristic impedance, Z₀, of the cable. This method, known as parallel termination, allows for higher data rates over longer cable length. Figure 9-1 shows two end nodes terminated, while remaining nodes unterminated. THVD1454 can be designed in all node designs. TERM pin allows configuring the nodes for end nodes and middle nodes in the network.

Figure 9-1 Typical Half Duplex RS-485 Network With all Nodes Using THVD1454