A3240LLHLT

Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Function:	Unipolar Switch
Technology:	Hall Effect
Polarization:	South Pole
Sensing Range:	5mT Trip, 5mT Release
Test Condition:	-40°C ~ 150°C
Voltage - Supply:	4.2 V ~ 24 V
Current - Supply (Max):	6mA
Current - Output (Max):	25mA
Output Type:	Open Collector
Features:	--
Operating Temperature:	-40°C ~ 150°C (TA)
Package / Case:	SOT-23W
Supplier Device Package:	SOT-23W

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A3240LLHLT OverviewThe A3240LLHLT is a magnetic switch from Allegro MicroSystems, Inc. It is a solid-state switch that detects changes in magnetic fields and provides an open-collector output signal when magnetic fields are detected. The A3240LLHLT is a Hall effect switch designed for single-point sensing of north and south magnetic poles.A3240LLHLT Application FieldThe A3240LLHLT provides a reliable, cost-effective, and compact way to detect changes in magnetic fields. It is commonly used in automotive, industrial, and consumer applications. The A3240LLHLT can help Automotive manufacturers detect the orientation of the ignition key or the presence of a wheel lock. In industrial applications, the A3240LLHLT can be used in motion sensing applications and help identify the correct orientation of a machine part. In consumer applications, the A3240LLHLT can be used to monitor the movement of objects, detect the presence of a magnet, and enable basic security functions in devices such as door locks and security alarm systems.A3240LLHLT Working PrincipleThe A3240LLHLT is based on the Hall effect. The Hall effect is the voltage that is induced in a conductor when a magnetic field is applied perpendicular to it. The voltage is proportional to the strength of the magnetic field. When the magnetic field strength exceeds a certain threshold, the Hall effect generates a voltage that can be detected by an amplifier and output an open-collector signal. The A3240LLHLT contains a Hall-effect integrated circuit, a voltage regulator, and an open-drain output amplifier that provides a logic level output when the magnetic field strength exceeds the switch threshold. The output is an open-collector logic signal that can be connected to an external logic circuit. The A3240LLHLT is a single-pole, double-throw type of switch and can detect west and east magnetic poles.ConclusionThe A3240LLHLT is a reliable, cost-effective, and compact magnetic switch for detecting changes in magnetic fields. It is based on the Hall effect and provides an open-collector output when a magnet is detected. It is commonly used in automotive, industrial, and consumer applications. The A3240LLHLT is a single-pole, double-throw switch that can detect north and south magnetic poles.

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