US1881
                                                                          Hall Latch – High Sensitivity

Features and Benefits                                                 Application Examples

   Wide operating voltage range from 3.5V to 24V                         Automotive, Consumer and Industrial
   High magnetic sensitivity – Multi-purpose                             Solid-state switch
   CMOS technology                                                       Brushless DC motor commutation
   Chopper-stabilized amplifier stage                                    Speed detection
   Low current consumption                                               Linear position detection
   Open drain output                                                     Angular position detection
   Thin SOT23 3L and flat TO-92 3L                                       Proximity detection
     both RoHS Compliant packages

Ordering Information

Part No.                            Temperature Code                             Package Code

US1881                              E (-40°C to 85°C)                            SE (TSOT-3L)
US1881                              E (-40°C to 85°C)                            UA (TO-92)

US1881                              K (-40°C to 125°C)                           SE (TSOT-3L)
US1881                              K (-40°C to 125°C)                           UA (TO-92)

US1881                              L (-40°C to 150°C)                           SE (TSOT-3L)
US1881                              L (-40°C to 150°C)                           UA (TO-92)

 1 Functional Diagram                                            2 General Description

                                                                 The    Melexis    US1881      is  a   Hall-effect  latch
                                                                 designed in mixed signal CMOS technology.

                                                                 The    device  integrates   a  voltage  regulator,  Hall
                                                                 sensor    with  dynamic   offset   cancellation   system,
                                                                 Schmitt trigger and an open-drain output driver, all
                                                                 in a single package.

                                                                 Thanks   to   its   wide   operating   voltage   range   and
                                                                 extended   choice   of   temperature   range,   it   is   quite
                                                                 suitable   for  use   in  automotive,    industrial  and
                                                                 consumer applications.

                                                                 The   device   is   delivered   in   a   Thin   Small   Outline
                                                                 Transistor (TSOT) for surface mount process and
                                                                 in a Plastic Single In Line (TO-92 flat) for through-
                                                                 hole mount.
                                                                 Both 3-lead packages are RoHS compliant.

3901001881                                            Page 1 of 12                                        Data Sheet
Rev 015                                                                                                  Jan/06

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