Latching Digital Hall-effect Sensor ICs: 005902 Issue 3 SS361RT, SS461R Datasheet FEATURES SS361RT L atching magnetics Enhanced sensitivity SS461R Wide operating voltage range Built-in reverse voltage capability Robust design RoHS-compliant material meets directive 2002/95 POTENTIAL APPLICATIONS Transportation Speed and RPM sensing Tachometer, counter pickup DESCRIPTION Motor and fan control The SS361RT and SS461R are small, versatile, digital Hall- Electronic window lift effect sensor ICs that are operated by the magnetic field from Convertible roof position a permanent magnet or an electromagnet, and designed to Automotive transmission position respond to alternating North and South poles. The SS361RT is Industrial turned on by a North pole while the SS461R is turned on by a Speed and RPM sensing South pole. Tachometer, counter pickup Flow-rate sensing These latching digital Hall-effect sensor ICs have enhanced Brushless dc motor commutation sensitivity of only 50 G typical, at 25C 77 F that often allows Motor and fan control for the use of less expensive magnets or wider air gaps. They Robotics control offer a robust IC design with reverse polarity protection and 150 C 302 F capability. PORTFOLIO These product are available in two package styles: The SS361RT and SS461R are part of Honeywells family of SS361RT: Subminiature SOT-23 surface-mount package on Latching Digital hall-effect Sensor ICs, including: pocket tape and reel which allows for compact design with SS360PT, SS460P, SS460P-T2 automated component placement. SS360NT, SS360ST, SS360ST-10K SS460S, SS460S-T2 SS461R : Flat TO-92-style package with straight leads in bulk SS361CT, SS461C packaging which allows for a compact PC board layout. SS46 SS461A, SS466A Sensing and Productivity SolutionsLatching Digital Hall-effect Sensor ICs SS361RT, SS461R Table 1. Electrical and Environmental Specifications (At Vs = 3.0 Vdc to 24.0 Vdc, 20 mA load, T = -40 C to 150 C -40 F to 302 F except where otherwise specified. A Characteristic Condition Min. Typ. Max. Unit Supply voltage: SS361RT 150 C 302 F 3.0 12.0 VVdc SS361RT -40 C to 125 C -40 F to 257 F 3.0 24.0 SS461RT 3.0 24.0 V = 3 Vdc at 25 C 77 F 3.5 5.0 supply Supply current V = 5 Vdc at 25 C 77 F 4.0 6.0 mA supply 8.0 Output current 20.0 mA V Gauss > 120 0.4 V sat Output leakage current Gauss < -120 10.0 A Rise/fall time 25 C 77 F 1.5 s Thermal resistance: SS361RT single layer, single sided PCB 303 C/W SS461R 233 Magnetic characteristics: Operate (Bop) 5 50 120 Gauss Release (Brp) -120 -50 -5 Differential 50 100 170 Operating temperature -40 -40 150 302 C F Storage temperature -40 -40 150 302 C F Soldering temperature and time: SS361RT infrared reflow process: 245 C 473 F for 10 s max. SS461RT wave soldering process: 250 C to 260 C 482 F to 500 F for 3 s max. NOTICE NOTICE These Hall-effect sensor ICs may have an The magnetic field strength (Gauss) initial output in either the ON or OFF state required to cause the switch to change if powered up with an applied magnetic state (operate and release) will be as field in the differential zone (applied specified in the magnetic characteristics. magnetic field >Brp and <Bop). Honeywell To test the switch against the specified recommends allowing 10 s after supply limits, the switch must be placed in a voltage has reached 5 V (SS361RT) or uniform magnetic field. 3 V (SS461R) for the output voltage to stabilize. Table 2. Absolute Maximum Specifications Characteristic Min. Typ. Max. Unit Supply voltage -28.0 28.0 V Applied output voltage -0.5 28.0 V Output current 20.0 mA Magnetic flux no limit Gauss NOTICE Absolute maximum ratings are the extreme limits the device will momentarily withstand without damage to the device. Electrical and mechanical characteristics are not guaranteed if the specified voltage and/or currents are exceeded, nor will the device necessarily operate at absolute maximum ratings. Sensing and Productivity Solutions 2