The output transistor will be switched on (BOP) in
the presence of a sufficiently strong South pole
magnetic field facing the marked side of the package.
Similarly, the output will be switched off (BRP)
in the presence of a weaker South field and remain
off with ¡°0¡± field. The SOT-23 device is reversed
from the UA package. The SOT-23 output transistor
will be switched on (BOP) in the presence of a
sufficiently strong North pole magnetic field subjected
to the marked face.