CH941TB

Cosemitech CH941 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. REV 1.0 FEATURES and FUNCTIONAL DIAGRAM · · · · · · · · PACKAGE Unipolar respond to a single pole: North (CH941S) or South (CH941T and CH941E), making these products well-suited for shift selectors, wiper end/home position, door ajar/open, and vane-interrupt systems etc. Enhanced sensitivity: will operate from Brp 110 Gauss to Bop 150 Gauss typical with very good temperature-stable and stressresistant, allowing the use of smaller, potentially lower-cost TO-92S magnets or high robust application Subminiature, SOT-23-3L(CH941S) or SOT-89-3L(CH941E) surface mount package supplied on tape and reel allows for a compact design with automated component placement, helping to reduce manufacturing costs Small, leaded, flat, TO-92S package (CH941T) allows for a compact PCB layout SOT-23 -3L SOT-89-3L Wide operating voltage range of 3.3V to 30V makes these sensors useable in a wide range of applications APPLICATIONS Built-in reverse voltage capability enhances the protection of the Commercial: sensor and the circuits with which it is used -Door or lid closure detection i n Robust design: will operate up to 150 °C appliances RoHS-compliant material meets directive 2002/95 -Speed and RPM sensing in fitness equipment -Flow rate sensing in appliances and water softeners -Damper or valve position control in HVAC equipment -Printer head position sensing Industrial -Flow rate sensing in industrial processes -Robotic control (cylinder position monitoring) -Float-based fluid level sensing Medical -Displacement sensor in hospital beds and medical equipment -Medication bin monitor on portable drug carts DESCRIPTION The CH941S, CH941E and CH941T are small, versatile digital Hall-effect devices that are operated by the magnetic field from a permanent magnet or an electromagnet. This unipolar sensors are designed to meet the requirements of a wide range of potential applications. These economical unipolar sensors are well suited for simple, high-volume, cost-sensitive position and motion sensing applications. The 3.3Vdc to 30 Vdc supply voltage range allows this device to be used in very wide voltage applications. These sensors are available in two package styles: the CH941S in the subminiature SOT-23-3L surface mount package, the CH941E in the subminiature SOT-89-3L surface mount package, the CH941T is available in the leaded, flat TO-92-style package. The CH941S and CH941E are available on tape and reel (CH941S 3000 units per reel, CH941E 1000 units per reel), the CH941T is available in a bulk package (1000 units per bag). Page 1/10 Cosemitech CH941 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. REV 1.0 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. Definition of Switching Function ...............................................................................................4 7. Temperature Characterization ..................................................................................................4 8. Parameters Specification ..........................................................................................................5 9. Test Conditions ........................................................................................................................6 10.Typical Application Circuit ........................................................................................................6 11.Typical Output Waveform .........................................................................................................6 12. Package Information ...............................................................................................................7 Page 2/10 Cosemitech CH941 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. REV 1.0 1. Product Family Members Part Number Marking ID CH941SR C941 CH941TB C941 CH941ER C941 Description Uni-polar, Open Collector Output, Hall-effect digital sensor IC, SOT-23-3L package, tape and reel packing (3000 units per reel) Uni-polar, Open Collector Output, Hall-effect digital sensor IC, flat, TO-92S package, bulk packing (1000 units per bag) Uni-polar, Open Collector Output, Hall-effect digital sensor IC, SOT-89-3L package, tape and reel packing (1000 units per reel) 2. Pin Definitions and Descriptions SOT-23-3L(S) TO-92S(T) Name Type 1 1 VDD Supply Supply Voltage pin 2 3 OUT Output Open Collector Output pin 3 2 GND Ground Ground pin SOT-23-3L Function TO-92S SOT-89-3L 3. Absolute Maximum Ratings Parameter Supply Voltage Reverse Voltage Supply Current Symbol VDD VRDD IDD Min - Max 40 -40 20 Units V V mA Output Voltage VOUT - 40 V Output Current IOUT - 20 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 3/10 Cosemitech CH941 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. REV 1.0 4. ESD Protections Parameter All pins 1) All pins 2) Value Unit +/-2000 V +/-200 V All pins 3) +/-750 1) HBM (human body mode, 100pF, 1.5 kohm ) according to MIL-STD-883H Method 3015.8 2) MM (Machine Mode C=200pF, R=0Ω) according to JEDEC EIA/JESD22-A115 3) CDM (charged device mode) according to JEDEC EIA/JESD22-C101F V 5. Function Description The CH941S/CH941T/CH941E exhibits unipolar magnetic switching characteristics. Therefore, it requires south or north poles to operate properly. The device behaves as a unipolar with asymmetric operating and release switching points. This means While the magnetic flux density(B) is larger than operate point (Bop), the output will be turned on (Low), while the magnetic flux density(B) is lower than release point (Brp), then turn off (High). 6. Magnetic Activation 7. Temperature Characteristics 7. Temperature Characteristics Page 4/10 Cosemitech CH941 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. REV 1.0 8. Parameters Specification (At 3.3V to 30V supply, 20mA load, TA= -40 ºC to 150 ºC except where otherwise specified.) Symbol VDD IDD VDSon IOFF TR TF RTH BOP BRP BHYST FSW T TS Parameter Supply voltage Supply Current Output saturation voltage Output Leakage Current Output rise time Output fall time Thermal resistance: CH941S (SOT-23-3L) CH941T (TO-92S) CH941E(SOT-89-3L) Magnetic operating point Magnetic release point Magnetic hysteresis window Maximum Switching Frequency Operating temperature Storage temperature: Test Condition -40 °C to 150 °C VDD = 5V at 20mA, Gauss >200 BBrp and