CH912LSR

Cosemitech CH912/CH912L Automotive Product Group This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice and Cosemitech assumes no obligation for future manufacture of this product. Contact Cosemitech for the latest status. Preliminary Datasheet 1.4 FEATURES and FUNCTIONAL DIAGRAM           Micro-power Omnipolar-Switch Hall Sensor Multiple Sensitivity Options (BOP / BRP): ±33 / ±23 Gauss; Push-pull output ability Chopper stabilized design provides: - Superior temperature stability - Minimal switch point drift - Enhanced immunity to physical stress On board voltage regulator for 1.65V to 5.5V range Push-pull Output (1 mA current ability) Solid-state reliability Wide Operating temperature range: -40 to 150 oC Small package sizes TO-92S, SOT-23 RoHS-compliant material meets directive 2011/65/EU PACKAGE TO-92S SOT-23-3L APPLICATIONS -Open and Close Detect for Flip/Slide Cellular Phones； -Smart Cover or Dock Detect for Cellular Phones and Tablet PCs; -Cover or Display Switch in Portable PCs (eg: Ultrabook); Digital Still, Video Cameras and Handheld Gaming Consoles； -Door, Lids and Tray Position Switches； -Level, Proximity and Position Switches； -Contact-Less Switches in Home Appliances and Industrial Applications. DESCRIPTION The CH912/CH912L is a high-sensitivity extremely temperature-stable micro-power Omnipolar Hall effect switch IC with internal pull up and pull down capability. Designed for portable and battery powered consumer equipment such as cellular phones and portable PCs to office equipment, home appliances and industrial applications, the average supply current is only 1.62μA at 3,3V for CH912 and 0.92uA at 3.3V for CH912L. To support potable equipment, the CH912/CH912L can operate over the supply range of 1.65V to 5.5V and uses a hibernating clocking system to minimize the power consumption. The device includes a clocking system, a Hall-voltage generator, a small-signal amplifier, a chopper stabilization, two Schmitt trigger, and an output driver controller. The output is activated with either a north or south pole of sufficient magnetic field strength. When the magnetic flux density (B) perpendicular to the package is larger than operate point (Bop), the output will be turned on (pulled low) and held until B is lower than release point (Brp). Two package styles provide a magnetically optimized package for most applications, SOT-23 and TO92S. Each package type is lead (Pb) free (suffix, –T), with a 100% matte-tin-plated leadframe. Page 1/9 Cosemitech CH912/ CH912L Automotive Product Group . This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice and Cosemitech assumes no obligation for future manufacture of this product. Contact Cosemitech for the latest status. Preliminary Datasheet 1.4 Table of Contents 1. Product Family Members ....................................................................................................... 3 2. Pin Definitions and Descriptions ............................................................................................ 3 3. Absolute Maximum Ratings ................................................................................................... 3 4. ESD Protections ..................................................................................................................... 4 5. Function Description .............................................................................................................. 4 6. Magnetic Activation ................................................................................................................ 4 7. Temperature Characterization ............................................................................................... 6 8. Parameters Specification ....................................................................................................... 6 9. Application infromation........................................................................................................... 7 10. Package Information .......................................................................................................... 10 Page 2/9 Cosemitech CH912/CH912L Automotive Product Group This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice and Cosemitech assumes no obligation for future manufacture of this product. Contact Cosemitech for the latest status. Preliminary Datasheet 1.4 1. Product Family Members Part Number Marking ID CH912SR C912 CH912TB C912 CH912LSR 912L CH912LTB 912L Description Micro-power Omnipolar-Switch, Hall-effect digital sensor IC, SOT-23-3L package, tape and reel packing (3000 units per reel) Micro-power Omnipolar-Switch, Hall-effect digital sensor IC, flat, TO-92S package, bulk packing (1000 units per bag) Micro-power Omnipolar-Switch, Hall-effect digital sensor IC, SOT-23-3L package, tape and reel packing (3000 units per reel) Micro-power Omnipolar-Switch, Hall-effect digital sensor IC, flat, TO-92S package, bulk packing (1000 units per bag) 2. Pin Definitions and Descriptions SOT-23-3L (S) 1 TO-92S (T) 1 2 3 3 2 Name Type VDD Supply Supply Voltage pin OUT Output Push-pull Output pin GND Ground Ground pin SOT-23-3L SOT-23-3L Function TO-92S TO-92S 3. Absolute Maximum Ratings Parameter Supply Voltage VDD Reverse Voltage VDD Supply Current Symbol VDD VRDD IDD Min -0.3 - Max 6 3 Units V V mA Output Voltage VOUT -0.3 VDD+0.3 V Output Current IOUT - 3 mA Operating Ambient Temperature TA -40 150 °C Storage Temperature TS -50 150 °C Junction temperature TJ -50 165 °C Magnetic Flux B No Limit Gauss Note: Exceeding the absolute maximum ratings may cause permanent damage. Exposure to absolutemaximum- rated conditions for extended periods may affect device reliability. Page 3/9 Cosemitech CH912/ CH912L Automotive Product Group . This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice and Cosemitech assumes no obligation for future manufacture of this product. Contact Cosemitech for the latest status. Preliminary Datasheet 1.4 4. ESD Protections Parameter All pins 1) Value Unit +/-8000 V All pins 2) +/-400 V All pins 3) +/-1500 V 1) HBM (Human Body Mode) according to AEC-Q100-002 2) MM (Machine Mode) according to AEC-Q100-003 3) CDM (charged device mode) according to AEC-Q100-011 5. Function Description The CH912/CH912L exhibits Micro-power digital Omnipolar switching characteristics. Therefore, it requires only south poles or north poles to operate properly. When the applied magnetic flux density exceeds the BOP threshold, the chip push-pull output goes low. The output stays low until the field decreases to less than BRP, and then the output goes to high. A magnetic hysteresis BHYST keeps BOP and BRP separated by a minimal value. This hysteresis prevents output oscillation near the switching point. 6. Magnetic Activation 7. Temperature Characteristics Page 4/9 Cosemitech CH912/CH912L Automotive Product Group This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice and Cosemitech assumes no obligation for future manufacture of this product. Contact Cosemitech for the latest status. Preliminary Datasheet 1.4 8. Parameters Specification (VCC=3V supply, TA= -40 ºC to 150 ºC except where otherwise specified.) Symbol VCC ICC(awake) ICC(sleep) ICC(avg) Operating, TJ < 165°C Min. Typ. Unit 5.25 V During awake period, TA = CH912L Supply Current 25°C, VCC=3.3V – 1.1 1.6 mA – 1.1 1.6 mA CH912 Supply Current – 0.7 – uA 0.7 – CH912 Supply Current During sleep period, TA = CH912L Supply Current 25°C, VCC=3.3V 1.8 Max. – uA CH912 Average supply TA = 25°C, VDD = 1.8V current TA = 25°C, VDD = 3.3V 1.09 uA 1.62 uA CH912L Average supply TA = 25°C, VDD = 1.8V current TA = 25°C, VDD = 3.3V 0.52 uA 0.92 uA Output low voltage(on) IOUT =1 mA – 0.1 0.2 V VOH Output high voltage(off) IOUT = -1mA VCC0.2 VCC0.1 – V CH912 Awake time (note4) – 40 60 us CH912L Awake time (note4) – 40 60 us CH912 Period (note4) – 50 75 ms CH912L Period (note4) – 200 280 mS Duty cycle CH912 – – 0.08 – % Duty cycle CH912L – – 0.02 – % – 500 – kHz – 1 μA ±33 ±46 Gauss ±23 ±36 Gauss 10 – Gauss Tperiod D.C. fC 3. Supply Voltage Test Conditions VOL Tawake 1. 2. Characteristic Chopping Frequency IOFF Output Leakage Current Bop Operate point Brp Release point Hys Hysteresis VOUT = 5.5 V; Switch state – = Off VDD = 1.8V to 5.25V ±20 TA = -40°C to 150°C VDD = 1.8V to 5.25V ±10 TA = -40°C to 150°C VDD = 1.8V to 5.25V – TA = -40°C to 150°C 1G (gauss) = 0.1 mT (millitesla). Measured from 10% to 90% of the steady state output. When power is initially turned on, the operating VCC (1.6V to 5.5V) must be applied to guaranteed the output sampling. The output state is valid after the second operating cycle (typical 100ms). NOTICE: The magnetic field strength (Gauss) required to cause the switch to change state (operate and release) will be as specified in the magnetic characteristics. To test the switch against the specified magnetic Page 5/9 Cosemitech CH912/ CH912L Automotive Product Group . This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice and Cosemitech assumes no obligation for future manufacture of this product. Contact Cosemitech for the latest status. Preliminary Datasheet 1.4 characteristics, the switch must be placed in a uniform magnetic field. 9. Application Information 9.1 Typical Application It is recommended that an external capacitor CIN is connected to the supply. This can reduce the noise injected into the device. Normal 0.1uF is suggested. Typical Application Circuit 9.2 Device Output If the device is powered on with a magnetic field strength between BRP and BOP, then the device output is indeterminate and can either be high or Low. If the field strength is greater than BOP, then the output is pulled low. If the field strength is less than BRP, then the output is pulled high. Page 6/9 Cosemitech CH912/CH912L Automotive Product Group This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice and Cosemitech assumes no obligation for future manufacture of this product. Contact Cosemitech for the latest status. Preliminary Datasheet 1.4 10. Package Information: Page 7/9 Cosemitech CH912/ CH912L Automotive Product Group . This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice and Cosemitech assumes no obligation for future manufacture of this product. Contact Cosemitech for the latest status. Preliminary Datasheet 1.4 Page 8/9 Cosemitech CH912/CH912L Automotive Product Group This is advanced information on a new product now in development or undergoing evaluation. Details are subject to change without notice and Cosemitech assumes no obligation for future manufacture of this product. Contact Cosemitech for the latest status. Preliminary Datasheet 1.4 Information furnished is believed to be accurate and reliable. However, Cosemitech assumes no responsibility for the consequences of use of such information nor for any infringement of patents or other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or patent rights of Cosemitech. Specification mentioned in this publication are subject to change without notice. This publication supersedes and replaces all information previously supplied. Cosemitech products are not authorized for use as critical components in life support devices or systems without express written approval of Cosemitech. The Cosemitech logo is a registered trademark of Cosemitech Page 9/9