A1104一般用数码相机、手机上等等
FeaturesSuperior Temp. Stability for Automotive or Industrial Applications4.5 V to 24 V Operation ... Needs Only An Unregulated SupplyOpen-Collector 25 mA Output ... Compatible with Digital LogicReverse Battery ProtectionActivate with Small, Commercially Available Permanent MagnetsSolid-State ReliabilitySmall SizeResistant to Physical Stress