6.3 Heartbeat

The MTCH9010 liquid detector provides a Heartbeat feature that signals that the device is fully operational. The heartbeat signal depends on the configured Sleep period, the output level toggling every time the device enters Sleep state.

On the HB pin, in case of proper operation, the device will output a 100 ms long pulse while it wakes up, acquires data, and outputs it before going back to Sleep state.

The HB pin has an alternate function used when the device enters an Error state. Refer to Error State.