The211,a1-chipcomposedofhallsensorandoutputcoildrivers,appliedto2-phaseDCmotor.ThehighsensitivityofHallEffectsensorissuitableformotorsfrommini-typeCPUcoolerstoblowersandDCfans.Typicaloperationcurrentis0.40Aandoperatingvoltagerangeiswide.FGsingle,anopencoollector,providesasquarewaveformoutputforthedetectionofthemotorspeed.