NMH1000 Magnetic Switch NXP Semiconductors NMH1000 Magnetic Switch is a Hall effect magnetic field switch that operates at low voltage, current, and output data rate. The NMH1000 is most sensitive to a vertical field passing through the top-to-bottom surfaces, orthogonal to the plane of the application printed circuit board. Processing of input is enabled by functional blocks such as a configurable state machine, analog-to-voltage conversion of the input, and comparison to generate the bi-state output positioned in linear succession.