The TCAN1144-Q1 and TCAN1146-Q1 monitors the
VSUP supply rail for under voltage event, UVSUPF. If this threshold is
crossed the filter time, tUVFLTR, starts and must expire to be considered an
under voltage event. A UVSUP event will cause the INH pin to turn off. When
the VSUP is greater than UVSUP and INH turns on the SWE timer will start as
the device enters standby mode. If VSUP decreases until less than VSUP(PU)F,
the device shuts everything down as the POR level has been reached. When VSUP returns,
the device comes up as if it is the initial power on. All registers are cleared and the
device has to be reconfigured.