OH9249 High Sensitivity Micropower Omnipolar Hall-Effect Switch Order Information Part Number Package Temperature Range Marking ID Packing Type OH9249-S SOT23 -40 to 85°C GJ9 Tape & Reel General Description Description:: The OH9249 is an ultra-sensitive Hall-effect switch with digital latched output, mainly designed for battery-operation, hand-held equipments. Special CMOS process is used for low-voltage and low-power requirement. A chopper stabilized amplifier improves stability of magnetic switch points. A sleep-awake logic controls the IC in sleep 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 in its previous state and the current consumption will reduce to some μA. The IC switching behaviour is omnipolar, either north or south pole sufficient strength will turn the output on. If the magnetic flux density is larger than operating point (BOP), the output will be turned on; if it is less than releasing point (BRP), the output will be turned off. Features Applications • Micropower Operation • Cover Switch in Notebook PC/PDA • 2.5 to 5.5V Power Supply • Handheld Wireless Application Awake Switch • Switching for Both Poles of a Magnet (Omnipolar) • Magnet Switch in Low Duty Cycle • Stabilized Chopper Applications • Superior Temperature Stability • Digital Output Signal • Built-in Pull-up Resistor • ESD Rating: 4000V (Human Body Model) Functional Block Diagram 600V (Machine Model) Absolute Maximum Ratings （TA=25℃） Supply Voltage VCC·············· 7 V Supply Current (Fault) ICC ··············6 mA Output Voltage VOUT ··············7 V Output Current IOUT ··············2 mA Magnetic Flux Density B ·············Unlimited Storage Temperature ·············-55 to 150 °C Junction Temperature ············150 °C NOTE：Electronic semiconductor products are sensitive to Electro Static Discharge (ESD). Always observe Electro Static Discharge control procedures whenever handling semiconductor products. Nanjing Ouzhuo Technology co., Ltd Tel：86-25-52312738，86-25-83247886 Page 1 www.ohhall.com FAX: 86-25-52312738 www.zbling.com E-mail: [email protected] OH9249 High Sensitivity Micropower Omnipolar Hall-Effect Switch Electrical Characteristics Vcc =3V, TA=25°C, unless otherwise specified Parameter Symbol Supply Voltage VCC Supply Current Value Conditions Unit Min Typ Max 2.5 3 5.5 V mA IAW Awake 2 4 ISL Sleep 6 10 IAVG Average 10 15 μA 1.0 mA 1.0 μA 0.4 V μA Output Current IOUT Output Leakage Current ILEAK B<︱BRP︱ - Saturation Voltage VSAT IOUT =1.0mA - Awake Mode Time tAW OPERATING 150 Sleep Mode Time tSL OPERATING 90 Duty Cycle D 0.15 % Chopper Frequency fC 15 kHz <0.1 μs 120 ms Magnetic Characteristics Vcc =3V, TA=25°C, (1mT = 10 Gauss) Parameter Max 30 55 Conditions BOPS South pole to branded side B>BOPS,VOUT=low(output on) BOPN North pole to branded side B>BOPN,VOUT=low(output on) -55 -30 GS BRPS South pole to branded side B<BRPS,VOUT=high(output off) 5 20 GS BRPN North pole to branded side B<BRPN,VOUT=high(output off) BH ︱BOPX - BRPX︱ Operate Point Release Point Hysteresis Value Typ symbol Min - Page 2 www.ohhall.com FAX: 86-25-52312738 GS -20 -5 GS 10 - GS BOPX=operating point(output turns on); BRPX=releasing point(output turns off) Nanjing Ouzhuo Technology co., Ltd Tel：86-25-52312738，86-25-83247886 Unit www.zbling.com E-mail: [email protected] OH9249 High Sensitivity Micropower Omnipolar Hall-Effect Switch Output Voltage vs. Magnetic Flux Density Typical Application ： Nanjing Ouzhuo Technology co., Ltd Tel：86-25-52312738，86-25-83247886 Page 3 www.ohhall.com FAX: 86-25-52312738 www.zbling.com E-mail: [email protected] OH9249 High Sensitivity Micropower Omnipolar Hall-Effect Switch Mechanical Dimension unit:mm(inch) SOT23 Nanjing Ouzhuo Technology co., Ltd Tel：86-25-52312738，86-25-83247886 Page 4 www.ohhall.com FAX: 86-25-52312738 www.zbling.com E-mail: [email protected]