original switch hall chip for awake switch HX259 hall element used in awake switch

  HX259 Hall-effect Sensor is a Temperature stable, stress-resistant Switch. Superior high-temperature performance is made possible through a dynamic offset cancellation that utilizes chopper-stabilization. This method reduces the offset voltage normally caused by device over molding, temperature dependencies, and thermal stress.   HX259 includes the following on a single silicon chip: voltage regulator, Hall voltage generator, small-signal amplifier, chopper stabilization, Schmitt trigger, open-drain output. Advanced CMOS wafer fabrication processing is used to take advantage of low-voltage requirements, component matching, very low input-offset errors, and small component geometries.   HX259 is rated for operation between the ambient temperatures –40℃ and +85℃ for the E temperature range. The four package styles available provide magnetically optimized solutions for most applications. Package types SO is an SOT-23(1.1 mm nominal height), SP is an PSOT-23(0.55 mm nominal height),ST is an SOT-23(0.7mm nominal height), a miniature low-profile surface-mount package, while package UA is a three-lead ultra mini SIP for through-hole mounting.   The package type is in a Halogen Free version was verified by third party Lab.   Features and Benefits CMOS Hall IC Technology Strong RF noise protection 1.70 to 5.5V for battery-powered applications Omni polar, output switches with absolute value of North or South pole from magnet Operation down to 1.70V, Micro power consumption High Sensitivity for reed switch replacement applications Multi Small Size option Low sensitivity drift in crossing of Temp range Ultra Low power consumption at 5uA (Avg) High ESD Protection, HBM > ±4KV( min ) Open Drain output   Applications Solid state switch Handheld Wireless Handset Awake Switch ( Flip Cell/PHS Phone/Note Book/Flip Video Set) Lid close sensor for battery powered devices Magnet proximity sensor for reed switch replacement in low duty cycle applications Water Meter Floating Meter PDVD NB                
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