The TMUX7462F enters into the Fault mode when any of the input signals on the source (Sx) pins exceed V_FP or V_FN by a threshold voltage V_T. The switch input experiencing the fault automatically turns off, and the source pin becomes high impedance with negligible amount of leakage current flowing through the switch under the overvoltage condition. For how the drain pin (Dx) behavior under the Fault mode can be programmed, refer to Section 8.3.2.4. The general fault flag (FF) is asserted low in the Fault mode.

The overvoltage protection is provided only for the source (Sx) input pins. The drain (Dx) pin, if used as signal input, must stay in between V_FP and V_FN at all time since no overvoltage protection is implemented on the drain pin.