AH9248NTR-G1 Diodes Incorporated

NOT RECOMMENDED FOR NEW DESIGN USE AH1808 AH9248 HIGH SENSITIVITY MICROPOWER OMNIPOLAR HALL-EFFECT SWITCH Description Pin Assignments The AH9248 is an ultra-sensitive Hall-effect switch with digital latched (Front View) output, mainly designed for battery-operation, hand-held equipments. Special CMOS process is used for low-voltage and low-power 3 OUTPUT requirement. A chopper stabilized amplifier improves stability of 2 GND magnetic switch points. A sleep-awake logic controls the IC in sleep 1 VCC time or awake time. This function will reduce the average operating current of the IC. During the awake time, the output is changed with the magnetic flux density. During the sleep time, the output is latched TO-92S-3 in its previous state and the current consumption will reduce to some A. (Top View) The IC switching behaviour is omnipolar, either north or south pole Pin 1 Mark sufficient strength will turn the output on. If the magnetic flux density is larger than operating point (B ), the output will be turned on if it is OP less than releasing point (B ), the output will be turned off. RP VCC 1 2 OUTPUT The AH9248 is available in TO-92S-3, SOT-23-3 and DFN-22-3 3 GND packages which are optimized for most applications. 3 GND OUTPUT 2 1 VCC Features Micropower Operation SOT-23-3 DFN-22-3 2.5V to 5.5V Power Supply Switching for Both Poles of a Magnet (Omnipolar) Stabilized Chopper Applications Superior Temperature Stability Digital Output Signal Cover Switch in Notebook PC/PDA Built-in Pull-up Resistor (AH9249) Handheld Wireless Application Awake Switch Totally Lead-Free & Fully RoHS Compliant (Notes 1 & 2) Magnet Switch in Low Duty Cycle Applications Halogen and Antimony Free. Green Device (Note 3) Notes: 1. No purposely added lead. Fully EU Directive 2002/95/EC (RoHS) & 2011/65/EU (RoHS 2) compliant. 2. See NOT RECOMMENDED FOR NEW DESIGN AH9248 USE AH1808 Pin Descriptions Pin Number Pin Name Function TO-92S-3 SOT-23-3 DFN-22-3 1 1 1 VCC Power supply pin 2 3 3 GND Ground pin 3 2 2 OUTPUT Output pin Functional Block Diagram VCC 1 (1) Sleep/Awake Timing Bias Control Logic 3 (2) Hall OUTPUT Plate Chopper Comparator 2 (3) GND A (B) A for TO-92S-3 B for SOT-23-3 and DFN-22-3 2 of 14 AH9248 April 2017 Diodes Incorporated www.diodes.com Document number: DS39690 Rev. 2 - 3