The package type is in a lead (Pb)-free version was verified by third party organization.

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1 MH 281 is a unipolar Hall effect sensor IC. It incorporates advanced chopper stabilization technology to provide accurate and stable magnetic switch points. The design, specifications and performance have been optimized for applications of solid state switches. The output transistor will be switched on (BOP) in the presence of a sufficiently strong South pole magnetic field facing the marked side of the package. Similarly, the output will be switched off (BRP) in the presence of a weaker South field and remain off with field. The package type is in a lead (Pb)-free version was verified by third party organization. Features and Benefits CMOS Hall IC Technology Solid-State Reliability Chopper stabilized amplifier stage Unipolar, output switches with absolute value of South pole from magnet Operation down to 2.5V High Sensitivity for direct reed switch replacement applications Small Size in To 92S or Sot 23 package. 1% tested at 125 for K Spec. Custom sensitivity / Temperature selection are available. Applications Solid state switch Limit switch Current limit Interrupter Current sensing Magnet proximity sensor for reed switch replacement Ordering Information XX-XXX X XX-X-XX XX-X Lead Free Handling Code Company Name and Product Category MH:MST Hall Effect/MP:MST Power MOSFET Part number 181,182,281,481,482,185,248,249 Temperature range Package Identification E: 85 Degree C, K: 125 Degree C, L: 15 Degree C Package type Sorting Code UA:TO-92S,SO:SOT-23,ST:Tsot-25,SU:USON Sorting Package type α,β,blank.. Package Identification Code Temperature code 1,2,3.. Handling Code Part number BLANK: ESD bag, TR: Tape & Reel Lead Free Code Company Name and Product Category BLANK: Lead Free Device,G: Green 428 Page 1 of 7 Rev. 12

2 Part No. Temperature Suffix Package Type Package Identification 281 K (-4 to ) UA ( TO-92S) 1 K (-4 to ) SO (SOT-23 ) 5 E (-4 to + 85 ) UA ( TO-92S) 1 E (-4 to + 85 ) SO (SOT-23 ) 5 K spec is using in industrial and automotive application. Special Hot Testing is utilized. Functional Diagram Note: Static sensitive device; please observe ESD precautions. Reverse V DD protection is not included. For reverse voltage protection, a 1Ω resistor in series with V DD is recommended. Absolute Maximum Ratings Supply Voltage (Operating), V DD 28V Supply Voltage (Reverse) V DD -.3V Supply Current (Fault), I DD Output Voltage, V OUT Output reverse Voltage, V OUT Output Current (Fault), I OUT 5mA 24V -.3V 5mA Operating Temperature Range K, T A -4 to +125 Operating Temperature Range E, T A -4 to +85 Storage Temperature Range, T S -55 to +15 Note: Do not apply reverse voltage to V DD and V OUT Pin, It may be caused for Miss function or damaged device. 428 Page 2 of 7 Rev. 12

MH-281 Electrical Specifications DC operating parameters: T A = 25, V DD =12V DC (unless otherwise specified). Parameter Symbol Test Conditions Min. Typ. Max. Units Supply Voltage V DD Operating 2.

3 MH-281 Electrical Specifications DC operating parameters: T A = 25, V DD =12V DC (unless otherwise specified). Parameter Symbol Test Conditions Min. Typ. Max. Units Supply Voltage V DD Operating V Supply Current I DD Average ma Output Leakage I OFF B<,Vout=2V 1. µa Saturation Voltage V SAT Iout=2mA, B>.5 V Output Rise Time Tr Vdd=12V,RL=1.1Kohm,CL=2pf.4 µs Output Fall Time Tf Vdd=12V,RL=1.1Kohm,CL=2pf µs MH281 Magnetic Specifications DC operating parameters: T A = 25, V DD =12V DC (unless otherwise specified). Parameter Symbol Test Conditions Min. Typ. Max. Units Operating Point B OP 25 mt Release Point B RP 5 mt Hysteresis B HYS 4.5 mt Note: 1 mt = 1 Gauss. MH281-α Magnetic Specifications DC operating parameters: T A = 25, V DD =12V DC (unless otherwise specified). Parameter Symbol Test Conditions Min. Typ. Max. Units Operating Point B OP 3 mt Release Point B RP 4 mt Hysteresis B HYS 4.5 mt Note: 1 mt = 1 Gauss. Output Behaviour versus Magnetic Pole DC Operating Parameters Ta = -4 to 125, Vdd = 2.5 to 27V (unless otherwise specified) Parameter Test condition(so) OUT(SO) OUT(UA) South pole B< high Low Null or weak magnetic field B= or B < BRP high high North pole B> low high North pole South pole OUT=low(Vdson) OUT=low(Vdson) SO package UA package 428 Page 3 of 7 Rev. 12

4 Performance Graphs Typical Magnetic Switch Points VS.Vdd Typical Magnetic Switch Points VS.Temperature 3 3 Field Strength(Gauss) Field Strength(Gauss) Vdd(V) Temperature( ) 3 M in/m ax M agnetic Switch Range versus Temperature 3 Output Voltage versus flux density Vout off Flux Density(Gauss) Output Voltage(V) Temperature( ) 2 Vsat Vout Flux Density(mT) 428 Page 4 of 7 Rev. 12

5 Supply Current(mA) Typical Supply Current versus Supply Voltage IA=-4 IA=25 IA=125 Package power Typical Saturation Voltage versus Temperature Vdd=12V,Iout=2mA Supply Voltage(V) Temperature( ) Sensor Location, package dimension and marking MH 281 UA-1 Package NOTES: 1).Controlling dimension: mm 2).Leads must be free of flash and plating voids; 3).Do not bend leads within 1 mm of lead to package interface; 4).PINOUT: Pin 1 Pin 2 Pin 3 VDD GND Output Active Area Depth Sensor Location 428 Page 5 of 7 Rev. 12

6 MH 183 MH 281 SO-5 (SOT-23) Dimensions (Top view) SOT-23 Hall plate/ Chip location (Bottom view) NOTES: 1. PINOUT (See Top View at left :) Pin 1 Pin 2 Pin 3 VDD Output GND 2. Controlling dimension: mm; 3. Lead thickness after solder plating will be.254mm maximum. Tape On Reel Dimension for Sot 23 package Page 6 of 7 Rev. 1

7 MH 183 NOTES: 1. Material: Conductive polystyrene; 2. DIM in mm; 3. 1 sprocket hole pitch cumulative tolerance ±.2; 4. Camber not to exceed 1mm in 1mm; 5. Pocket position relative to sprocket hole measured as true position of pocket, not pocket hole; 6. (S.R. OHM/SQ) Means surface 528 Page 7 of 7 Rev. 1

MH 249 CMOS High Sensitivity Omni-polar Hall Switch α version

MH 249 CMOS High Sensitivity Omni-polar Hall Switch α version MH 249 Hall-effect sensor is a temperature stable, stress-resistant switch. Superior high-temperature performance is made possible through a dynamic offset cancellation that utilizes chopper-stabilization.