SCDS403C february 2021 – july 2023 TMUX7308F , TMUX7309F
PRODUCTION DATA
When the logic pins are set to a channel under a fault, the overvoltage detection will trigger, the switch will open, and the drain pin will be pulled up/down as described in Section 9.3.2.4. During such an event, all other channels not under a fault can continue to operate as normal. For example, if S1 voltage exceeds VDD, and the logic pins are set to S1, the drain output is pulled to VDD. If then the logic pins are changed to set S4, which is not in overvoltage or undervoltage, the drain will disconnect from the pullup to VDD and the S4 switch will be enabled and connected to the drain, operating as normal. If the logic pins are switched back to S1, the S4 switch will be disabled, the drain pin will be pulled up to VDD again, and the switch from S1 to drain will not be enabled until the overvoltage fault is removed.