Additional external protection components generally are not needed when using THVD24x9 transceivers.

1. Use V_CC/V_IO and ground planes to provide low-inductance. Note that high-frequency currents tend to follow the path of least impedance and not the path of least resistance. Apply 100nF to 220nF decoupling capacitors as close as possible to the V_CC/V_IO pins of transceiver, UART and/or controller ICs on the board.
2. Use at least two vias for V_CC/V_IO and ground connections of decoupling capacitors to minimize effective via inductance.
3. Use 1kΩ to 10kΩ pull-up and pull-down resistors for enable lines to limit noise currents in these lines during transient events.