TMR Switch Series - High Sensitivity Ultra-Low Power TMR Switch

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The TMR Switch is a digital magnetic switch that integrate Tunneling Magnetoresistance (TMR) and CMOS technology in order to provide a magnetically triggered digital switch with high sensitivity, and ultra-low power consumption. 

It contains TMR magnetic sensor and CMOS signal processing circuitry within the same package, including an on-chip TMR voltage generator for precise magnetic sensing, a TMR voltage amplifier and comparator plus a Schmitt trigger to provide switching hysteresis for noise rejection. 
An internal band gap regulator is used to provide a temperature compensated supply voltage for internal circuits, permitting a wide range of supply voltages. 
It is available in the package SOT23-3.

Features and Benefits:

  • TMR Technology supports Bop of 5 or 7 or 10 or 14 or 17 Gauss available
  • Ultra-Low Power Consumption: 200nA at 50 Hz response or 1.5 uA at 1 kHz response
  • X-axis or Z-axis sensing directions available.
  • Unipolar or Omnipolar or Bipolar (latching) operating modes available
  • Excellent Thermal Stability
  • Open Drain or Push Pull output available
  • SOT23-3 package


  • Proximity Switches
  • Utility Meters including Gas, Water and Heat Meters
  • Position and Speed Sensing
  • Motor and Fan Control
  • Solid State Switches

Access specifications, certifications, check availability and order parts below

Catalog #Switch TypeBop Threshold (Gauss)Brel Threshold (Gauss)Vsupply Current (uA)Frequency Response (Hz)Min. Supply Voltage (V)Max. Supply Voltage (V)Output TypeMin Operating Temp (°C)Max Operating Temp (°C)Sensing AxisPackage TypePart DatasheetPartner ECAD ModelsStockSamplesCompare
Part # Part Description RoHS Pb-free RoHS (2015/ 863/EU) Certificate REACH (SVHC’s) Declaration Halogen Free REACH (SVHC’s)
LF21235TMR LF21235TMR STD TMD SENS RoHS No 04/23/2020 PbFree No 04/23/2020 Yes
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