LF11115TMR - TMR Switch Series

Littelfuse TMR Switch A2159
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Littelfuse products are not designed for, and shall not be used for, any purpose (including, without limitation, automotive, military, aerospace, medical, life-saving, life-sustaining or nuclear facility applications, devices intended for surgical implant into the body, or any other application in which the failure or lack of desired operation of the product may result in personal injury, death, or property damage) other than those expressly set forth in applicable Littelfuse product documentation. Warranties granted by Littelfuse shall be deemed void for products used for any purpose not expressly set forth in applicable Littelfuse documentation. Littelfuse shall not be liable for any claims or damages arising out of products used in applications not expressly intended by Littelfuse as set forth in applicable Littelfuse documentation. The sale and use of Littelfuse products is subject to Littelfuse Terms and Conditions of Sale, unless otherwise agreed by Littelfuse. "Littelfuse" includes Littelfuse, Inc., and all of its affiliate entities.

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
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