The voltages on the source input pins of the TMUX7436F are continuously monitored, and the status of whether an overvoltage condition occurs is indicated by an active low general fault flag (FF). The voltage on the FF pin indicates if any of the source input pins are experiencing an overvoltage condition. If any source pin voltage exceeds the fault supply voltages by a V_T, then the FF output is pulled-down to below V_OL.

The specific fault (SF) output pins, on the other hand, can be used to decode which inputs are experiencing an overvoltage condition. As provided in the Table 8-1, the SF pin is pulled-down to below V_OL when an overvoltage condition is detected on a specific source input pin, depending on the state of the SEL1, SEL2, and EN logic pins.

Both the FF pin and the SF pin are an open-drain output and an external pull-up resistor of 1 kΩ is recommended. The pull-up voltage can be in the range of 1.8 V to 5.5 V, depending on the controller voltage the device interfaces with.