Unipolar Digital Hall-Effect Sensor ICs SS340RT/SS440R Series Datasheet Unipolar Digital Hall-Effect Sensor ICs The SS340RT/SS440R sensor ICs are small, versatile digital Hall-effect devices that are operated by the magnetic field from a permanent magnet or an electromagnet. They are designed to respond to a single pole: North (SS340RT) or South (SS440R). These unipolar Hall ICs are supplied in three different magnetic sensitivities to meet a wide range of potential applications: • SS341RT and SS441R offer the highest sensitivity, with a typical operating point of 75 G at 25 °C [77 °F]. • SS343RT and SS443R offer medium sensitivity, with a typical operating point of 135 G at 25 °C [77 °F]. • SS349RT and SS449R offer the lowest sensitivity, with a typical operating point of 305 G at 25 °C [77 °F]. These sensors are available in two package styles: • The SS340RT is available in the miniature SOT-23 surface mount package. • SS440R is available in the leaded, flat TO-92-style package. The SS340RT’s small size requires less PC board space, allowing it to be used in smaller assemblies. Its 3 Vdc capability allows for use in low voltage applications, promoting energy efficiency. The SS340RT Series is available on tape and reel (3000 units per reel); the SS440R Series is available in a bulk package (1000 units per bag). SS340RT What makes our sensors better: SS440R • Robust IC design with ESD Class 2, reverse polarity protection and 150 °C [302 °F] capability • Package and sensitivity options to better match application needs • Dependable performance – similar Honeywell sensor ICs have been tested to over 100 million operations • Honeywell legacy and expertise – 45 years of engineering excellence and Hall effect technology experience SMALL • VERSATILE sensing.honeywell.com 2 SubminiaTuRe package Size (SS340RT) Supplied on Tape Features and Reel and Benefits Allows for a compact design with automated component placement, helping to reduce manufacturing costs Simple acTivaTion fRom a Single pole and mulTiple magneTic SenSiTiviTieS (high, medium and low) Make this product suitable in a variety of potential motion control, lid closure detection, and displacement sensing applications High, medium and low magnetic sensitivities. low volTage 3 v capabiliTy Helps reduce power consumption builT-in ReveRSe polaRiTy pRoTecTion Protects the device from potential damage during installation TheRmally balanced inTegRaTed ciRcuiT Provides for stable operation over a wide temperature range of -40 °C to 150 °C [-40 °F to 302 °F] Enhances application flexibility. RohS-complianT maTeRialS Meet Directive 2002/95/EC sensing.honeywell.com 3 Potential Applications induSTRial dooR oR lid cloSuRe deTecTion in applianceS oR elecTRonically conTRolled conTaineRS May be used recessed in the door frame with a magnet embedded in the door. The magnet activates the sensor to indicate door open or close. Simple Speed and Rpm (RevoluTionS peR minuTe) SenSing in fiTneSS and induSTRial equipmenT May be mounted on the motor shaft of a treadmill such that the rotating magnet pole, which rotates with the motor, activates the sensor with each revolution, producing a single digital pulse for each revolution. flow RaTe SenSing in waTeR SofTeneRS, induSTRial pRoceSSeS, and applianceS May be used used with one or more magnets mounted on a paddle to measure the flow rate. dampeR oR valve poSiTion conTRol in induSTRial, hvac and ReSidenTial oR commeRcial applicaTionS May be used to determine if a valve or damper is fully open or fully closed. RoboTic conTRol (cylindeR poSiTion moniToRing) May be used to detect the piston’s position by detecting a magnet mounted on the piston ring located inside a non-ferromagnetic cylinder. level/TilT meaSuRemenT May be installed in the base of a machine with a magnet mounted pendulum fashion over the sensor. A change in state of the output as the magnet swings away from the sensor indicates that the machine is not level. RemoTe conveyoR SenSing May be mounted to the frame of the conveyor, with a magnet mounted on the tail pulley. When the magnet revolves past the sensor, it produces one output per revolution, providing an intermittent visual or audible signal at a remote location to assure stability. Any interruption of the conveyor motion will interfere with the normal signal and alert the operators. puSh buTTon conTRolS medical poSiTion SenSoR in hoSpiTal bedS and medical equipmenT May be used with a magnet mounted on the activator arm to determine the home or end-of-travel position of the equipment. medicaTion bin moniToR on poRTable dRug caRTS May be used to detect if a drug dispensing drawer is open or closed. sensing.honeywell.com 4 Unipolar Digital Hall-Effect Sensor ICs Table 1. SS340RT/SS440R performance Specifications (v = 3 vdc to 24 vdc, 20 ma load, T = -40 ºc to 150 ºc [-40 ºf to 302 ºf] supply a except where otherwise specified.) characteristic condition min. Typ. max. unit Supply voltage: SS340RT 150 °C [302 °F] 3 — 12 Vdc SS340RT -40 °C to 125 °C [-40 °F to 257 °F] 3 — 24 SS440R -40 °C to 150 °C [-40 °F to 302 °F] 3 — 24 V = 5 V at 25 °C [77 °F] — 4 6 supply Supply current V = 3 V at 25 °C [77 °F] — 3.5 5 mA supply — — — 8 Vsat 20 mA, Gauss >Bop — — 0.4 Vdc Output leakage current Gauss >Bop — — 10 µA Output switching time: rise V = 12 V at 25 °C [77 °F], — — 1.5 µs supply fall R = 1.6 kOhm, C = 20 pF — 1.5 L L Thermal resistance: SS340RT (SOT-23) — — 303 — °C/W SS440R (flat TO-92-style) — 233 — Operating temperature — -40 [-40] — 150 [302] °C [°F] Storage temperature — -40 [-40] — 165 [302] °C [°F] Table 2. SS340RT/SS440R magnetic Specifications (v = 3 vdc to 24 vdc, 20 ma load, T = -40 ºc to 150 ºc [-40 ºf to 302 ºf].) supply a characteristic min. Typ. max. unit Operate: SS341RT/SS441R 35 75 135 Gauss SS343RT/SS443R 45 135 205 SS349RT/SS449R 240 305 460 Release: SS341RT/SS441R 10 35 120 Gauss SS343RT/SS443R 40 85 180 SS349RT/SS449R 135 225 370 Hysteresis: SS341RT/SS441R 5 40 80 Gauss SS343RT/SS443R 5 50 120 SS349RT/SS449R 30 80 170 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 characteristics, the switch must be placed in a uniform magnetic field. Table 3. SS340RT/SS440R absolute maximum Ratings characteristic min. Typ. max. unit Supply voltage -28.0 — 28.0 V Applied output voltage -0.5 — 28.0 V Output current — — 20 mA Magnetic flux — — no limit Gauss NOTICE Absolute maximum ratings are the extreme limits that the device will withstand without damage to the device. However, the electrical and mechanical characteristics are not guaranteed as the maximum limits (above recommended operating conditions) are approached, nor will the device necessarily operate at absolute maximum ratings. sensing.honeywell.com 5 SS340RT/SS440R Series figure 1. Typical magnetic vs Temperature performance curves SS341RT/SS441R Typical SS341RT/SS441R Magnetic Performance vs Temperature 100 Operate Point 80 60 Vcc = 12 V Release Point 40 20 0 -40-20 020406080100 120140 Temperature (C) SS343RT/SS443R 180 160 Operate Point 140 120 Vcc = 12 V Release Point 100 80 60 40 20 0 -40-20 020406080100 120 140 Temperature (C) SS349RT/SS449R Typical SS349RT/SS449R Magnetic Performance vs Temperature 350 Operate Point 300 Vcc = 12 V Release Point 250 200 150 100 50 0 -40-20 020406080 100 120 140 Temperature (C) sensing.honeywell.com 6 Magnetic Switch Point (Gauss) Magnetic Switch Point (Gauss) Magnetic Switch Point (Gauss) Unipolar Digital Hall-Effect Sensor ICs figure 2. SS340RT Series maximum Rated Supply voltage vs Temperature figure 3. current Sinking output block diagram figure 4. wiring diagrams +DC + 5 Vdc Load 150 mA R 5 Vdc 5 Vdc 2N3638 +10 Vdc 5 Vdc 47 kΩ 5 Vdc PNP R R + Transistor R1 10 kΩ 1.2 kΩ 2N2222 + 550 Ω R NPN TTL or Sensor Sensor Transistor 100 Ω DTL Gate Sensor LED 50 mA - - - AC 5 Vdc +13 Vdc +15 Vdc HI +15 Vdc HI R R R1 13 Vdc 10 Vdc 2N3638 4.7 kΩ 47 kΩ 47 kΩ PNP PNP PNP Transistor Transistor + + + Transistor R R1 R1 Load Load 750 Ω 1.8 kΩ 680 Ω 100 mA R R Sensor Sensor Sensor SCR TRIAC Relay R R Coil - LOW LOW sensing.honeywell.com 7 SS340RT/SS440R Series figure 5. SS340RT mounting and Tape/Reel dimensions (for reference only. mm/[in].) e 2,90 [0.114] 3 GND (-) NOMINAL  IC CENTER >@  >@ Sensor 1 2 VCC OUTPUT (+) 3X 0,40 TYP. 0,95 [0.016] [0.037] 1,90 [0.075] 6 NOMINAL 1 TO IC SENSING 0,413 SURFACE [0.016] 0,77 1,20 [0.030] 1,45 [0.047] [0.057] 0,787 0,60 [0.031] [0.024] Tape 4,00 [0.157] 4,00 1,50 [0.157] [0.059] 2,00 0,20 [0.079] [0.008] 1,75 [0.069] 8,00 [0.312] 3,50 [0.138] 3,20 [0.125] 0,061 TOP [0.002] COVER TAPE 1,40 3,15 1,00 [0.055] [0.124] [0.039] 10,9 4,00 Reel [0.429] [0.157] MEASURED AT OUTER EDGE 40,0 [1.57] 10 14,4 [0.394] [0.567] MEASURED AT HUB 60,0 [2.362] 2,0 [0.079] 178 MAX. [7.000] 8,40 20,2 MIN. MEASURED 13,0 [0.795] [0.331] AT HUB [0.512] sensing.honeywell.com 8 Unipolar Digital Hall-Effect Sensor ICs figure 6. SS440R mounting dimensions (for reference only. mm/[in].) 2,5 NOMINAL 0,46 [0.100] TO IC [0.018] SENSING SURFACE 4,1 1,6 [0.161] [0.062] NOMINAL IC CENTER 3.0 [0.118] 16 1,83 [0.072] 14,61 [0.575] VS GND OUT 3X 0,3 [0.015] 2X 1,3 3X 0,43 0,76 [0.050] [0.017] [0.03] 3X 0,38 [0.015] order guide catalog listing description Unipolar, digital Hall-effect sensor IC, high sensitivity, SOT-23 package, tape and reel packaging SS341RT (3000 units per reel) Unipolar, digital Hall-effect sensor IC, medium sensitivity, SOT-23 package, tape and reel packaging SS343RT (3000 units per reel) Unipolar, digital Hall-effect sensor IC, low sensitivity, SOT-23 package, tape and reel packaging SS349RT (3000 units per reel) Unipolar, digital Hall-effect sensor IC, high sensitivity, flat TO-92-style package, bulk packaging SS441R (1000 units per bag) Unipolar, digital Hall-effect sensor IC, medium sensitivity, flat TO-92-style package, bulk packaging SS443R (1000 units per bag) Unipolar, digital Hall-effect sensor IC, low sensitivity, flat TO-92-style package, bulk packaging SS449R (1000 units per bag) sensing.honeywell.com 9 addiTional infoRmaTion WARNING The following associated literature is available at sensing.honeywell.com: PERSONAL INJURY • Product line guide DO NOT USE these products as safety or emergency stop • Product range guide: Position Sensors devices or in any other application where failure of the product • Product range guide: Speed Sensors could result in personal injury. • Product range guide: Sensors and Switches for Potential Failure to comply with these instructions could result in Medical Applications death or serious injury. • Product installation instructions WARNING MISUSE OF DOCUMENTATION • The information presented in this product sheet is for reference only. 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