Omnipolar switch with push-pull output
The Toshiba TCS40DPR,LF is an omnipolar magnetic switch from the TCS series, packaged in a SOT23F surface-mount package. It detects both north and south pole magnetic fields, switching on when the field exceeds ±4.4 mT and releasing at ±0.9 mT. Supply voltage is 2.3 V minimum, making it suitable for low-voltage battery-powered designs.
Switch-point hysteresis and temperature range
The 3.5 mT hysteresis between trip (±4.4 mT) and release (±0.9 mT) prevents output chatter when the magnetic field hovers near the threshold — a common failure in linear Hall sensors used as switches without software debounce. The switching current is 1.6 mA typical at 25°C, and the maximum output current is 5 mA — enough to drive a logic input or a small LED indicator directly.
Active production and sourcing
The closest functional peer is the TCS40DLR,LF, which uses an open-drain output instead of push-pull. The open-drain variant requires an external pull-up resistor but allows wired-OR connections on a shared bus — the push-pull version cannot be paralleled.