GENERAL DESCRIPTIONS MRX1550H series are monolithic ICs with built-in MR magnet resistive element and CMOS switch. It becomes the non-contact switch with low current consumption, high sensitivity and reliability which is combined with magnet.
A horizontal magnetic field parallel to the electrode of the package can be detected by an arbitrary polarity. (N pole ⇔ S pole)

FEATURES
• CMOS + MR monolithic structure
• Low current consumption ························· 4.7µA (VIN=5.0V, Ta=25°C)
• High-sensitivity ································ Typ. 1.5mT
• Operating temperature range ····················· -40 ~ +85°C
• Operating voltage range ························· 1.6V ~ 6.0V
• Detection pulse driving cycle ··················· Typ. 50msec with 25µsec width
• Magnetic direction ······························ Both direction / CMOS inverter one output
• Detection magnetic field ························ Horizontal direction of marked side of package
                                                                 (Electrode parallel both direction)
• Small package ··································· SOT-23 (2.9×2.8×1.1mm)

APPLICATIONS
• Detection of opening and closing :
   Mobile phone, Notebook PC, Microwave oven, Washing machine,
   Rice cooker, Refrigerator, Electronic dictionary, Digital camera, etc.
• Detection of position : Air cylinder, Antitheft window, Digital door lock, etc.
• Detection of water level : Water purifier, Humidifier, Bidet, etc.
• Detection of rotation : Water meter, Gas meter, Wattmeter, Speed meter, etc.
• Power supply switch : Cordless phone, Electric toothbrush, etc.