AH9251-W-7

AH9251 MEDIUM SENSITIVITY MICROPOWER OMNIPOLAR HALL-EFFECT SWITCH Description Pin Assignments NEW PRODUCT The AH9251 is a medium sensitivity Hall-effect switch with internal pull-up resistor on the output, designed for battery operated handheld equipments to industrial applications. (Front View) A chopper stabilized architecture improves stability of magnetic switch points over the whole operating range. A sleep-awake logic controls the sleep and awake time to reduce the average operating current of the device. During the awake time, the output is changed with the magnetic flux density. During the sleep time, the output is latched in its previous state and the current consumption reduces to 4µA typical at 3V. The average current consumption is 8µA at 3V. 3 OUTPUT 2 GND 1 VDD TO92S The output can be switched on with either north or south pole of sufficient strength. If the magnetic flux density perpendicular to the part marking surface is larger than operating point (BOP), the output will be turned on; if it is less than releasing point (B RP), the output will be turned off. (Top View) GND The AH9251 is available in industry standard TO92S and SC59 packages. 3 Features             Omnipolar Operation (Switching with North or South Poles) 2.5V to 5.5V Power Supply Micropower Operation Built in Pull-up Resistor on the Output Stabilized Chopper Superior Temperature Stability Digital Output Signal -40°C to +85°C Operating Temperature ESD (HBM): 5000V Small Low Profile Industry Standard SC59 and TO92S Packages Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Halogen and Antimony Free. “Green” Device (Note 3) Notes: 1 2 VDD OUTPUT SC59 Applications     Handheld Wireless Applications Proximity Detection Switches Doors, Lids, Covers and Tray Position Detect Switches Liquid Level Detection Battery Powered Consumer, Home Appliances and Industrial Applications 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. 2. See http://www.diodes.com/quality/lead_free.html for more information about Diodes Incorporated’s definitions of Halogen- and Antimony-free, "Green" and Lead-free. 3. Halogen- and Antimony-free "Green” products are defined as those which contain