Littelfuse TMR Switches
Littelfuse TMR Switches are digital magnetic switches that integrate tunneling magnetoresistance (TMR) and CMOS technology. This technology provides a magnetically triggered digital switch with high sensitivity, and ultralow power consumption. This Littelfuse series contains a TMR magnetic sensor and CMOS signal processing circuitry within the same package. An on-chip TMR voltage generator is also included for precise magnetic sensing. A TMR voltage amplifier and comparator plus a Schmitt trigger provide switching hysteresis for noise rejection.
Features
- 5, 7, 10, 14, or 17 Gauss BOP
- 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, omnipolar, or bipolar (latching) operating modes
- Excellent thermal stability
- Open drain or push-pull output available
- SOT23-3 package
Applications
- 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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View Results ( 8 ) Page
| Part Number | Datasheet | Operating Supply Current | Operating Supply Voltage | Maximum Output Current |
|---|---|---|---|---|
| LF21215TMR |  |
1.5 uA | 3 V | 9 mA |
| LF21115TMR | |
200 nA | 3 V | 9 mA |
| LF21235TMR | |
1.5 uA | 3 V | 9 mA |
| LF22214TMR | |
1.5 uA | 3 V | 20 mA |
| LF32115TMR | |
200 nA | 3 V | 20 mA |
| LF11115TMR | |
200 nA | 3 V | 9 mA |
| LF21112TMR | |
200 nA | 1.8 V to 5.5 V | |
| LF11215TMR | |
1.5 uA | 1.8 V to 5.5 V |
Published: 2019-12-16
| Updated: 2026-09-18