AH9247NTR-G1 Diodes Incorporated

Data Sheet High Sensitivity Micropower Omnipolar Hall-Effect Switch AH9247 General Description Features The AH9247 is an ultra-sensitive Hall-effect switch Micropower Operation with digital latched output, mainly designed for 2.5 to 5.5V Power Supply battery-operation, handheld equipments. Switching for Both Poles of a Magnet (Omnipolar) Special CMOS process is used for low-voltage and Stabilized Chopper low-power requirement. A chopper stabilized Superior Temperature Stability amplifier improves stability of magnetic switch Digital Output Signal points. A sleep-awake logic controls the IC in sleep Built-in Pull-up Resistor time or awake time. This function will reduce the ESD (HBM) 6000V 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 Applications latched in its previous state and the current consumption will reduce to some A. Cover Switch in Notebook PC/PDA Handheld Wireless Application Awake Switch The IC switching behaviour is omnipolar, either north Magnet Switch in Low Duty Cycle Applications or south pole 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 OP it is less than releasing point (B ), the output will be RP turned off. The AH9247 is available in TO-92S-3, SOT-23-3 and DFN-22-3 packages which are optimized for most applications. TO-92S-3 SOT-23-3 DFN-22-3 Figure 1. Package Types of AH9247 Mar. 2013 Rev. 2. 0 BCD Semiconductor Manufacturing Limited 1 Data Sheet High Sensitivity Micropower Omnipolar Hall-Effect Switch AH9247 Pin Configuration Z3 Package N Package (TO-92S-3) (SOT-23-3) (Front View) (Top View) DN Package (DFN-22-3) Pin 1 Mark VCC 1 3 GND OUTPUT 2 (Top View) Figure 2. Pin Configuration of AH9247 Pin Description 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 Mar. 2013 Rev. 2. 0 BCD Semiconductor Manufacturing Limited 2