Product Overview
The 44E is a high-voltage, high-sensitivity unipolar Hall effect switch designed with bipolar semiconductor technology. It features a voltage regulator for operation between 3.8V and 40V, temperature compensation, a small signal amplifier, a Schmitt trigger, and an open-collector output. This sensor is optimized for south pole response, where the output latches low when the magnetic flux density exceeds the operate point (Bop) and switches high when the flux density drops below the release point (Brp). Available in TO92S and SOT23-3L packages, both RoHS compliant, the 44E is suitable for applications such as brushless motor commutation, flow sensors, position sensors, speed sensors, and distance sensors.
Product Attributes
- Brand: SLKormicro (implied by website URL)
- RoHS Compliant: Yes
Technical Specifications
| Model | Package | Packaging | Operating Temperature (TA) | Description |
| SL44E-9 | TO92S | 1000 / Bag | -40C to 125C | High Voltage High Sensitivity Unipolar Hall Switch |
| SL44E-3 | SOT23-3L | 3000 / Reel | -40C to 125C | High Voltage High Sensitivity Unipolar Hall Switch |
| Feature | Value | Unit | Notes |
| Sensitivity (Typical) | 50/30 | Gauss | |
| Supply Voltage Range | 3.8 to 40 | V | |
| ESD Performance | 4 | kV | |
| Operating Temperature Range | -40 to 125 | C | |
| Output Type | Collector Open | | Requires pull-up resistor |
| Operate Point (Bop) | 33 to 60 | Gauss | Typical: 50 Gauss |
| Release Point (Brp) | 13 to 50 | Gauss | Typical: 30 Gauss |
| Hysteresis (Bhys) | 10 to 40 | Gauss | Typical: 20 Gauss |
| Supply Voltage (VSUP) | 3.8 to 40 | V | Electrical Characteristics |
| Quiescent Current (ISUP) | 6 to 9 | mA | VSUP=5V |
| Output Leakage Current (Ile) | 10 | uA | |
| Output Saturation Voltage (Vsat) | 0.4 | V | Iout=20mA, conductive state |
| Sink Current (Isink) | 30 | mA | |
| Rise Time (Tr) | 1 | us | CL=20pF |
| Fall Time (Tf) | 1.5 | us | CL=20pF |
| Parameter | Symbol | Min | Max | Unit |
| Supply Voltage | VDD | -0.3 | 60 | V |
| Output Current | Isink | 0 | 40 | mA |
| Output Voltage | Vout | -0.5 | 60 | V |
| Operating Temperature | Ta | -40 | 125 | C |
| Storage Temperature | Ts | -50 | 165 | C |
Pin Description
| Pin Number (TO92S) | Pin Number (SOT23-3L) | Name | Function |
| 1 | 1 | VSUP | Power Supply |
| 2 | 2 | GND | Ground |
| 3 | 3 | VOUT | Collector open output, requires pull-up resistor |
Package Dimensions
TO92S Package Dimensions (mm)
| Symbol | Min | Typical | Max |
| A | 2.90 | 3.00 | 3.10 |
| b | 0.35 | 0.39 | 0.40 |
| b1 | 0.44 | | |
| c | 0.36 | 0.38 | 0.40 |
| D | 4.00 | 4.10 | 4.20 |
| E | 1.42 | 1.52 | 1.62 |
| E1 | 0.75 | | |
| e | 1.27 | | |
| e1 | 1.27 | | |
| L | 2.54 | | |
| L1 | 13.50 | 14.50 | 15.50 |
| 1 | 6 | | |
| 2 | 3 | | |
| 3 | 45 | | |
| 4 | 3 | | |
| h | 3.6 | | |
SOT23-3L Package Dimensions (mm / Inches)
| Symbol | Min (mm) | Max (mm) | Min (Inches) | Max (Inches) |
| A | 1.05 | 1.25 | 0.041 | 0.049 |
| A1 | 0 | 0.1 | 0 | 0.004 |
| A2 | 1.05 | 1.15 | 0.041 | 0.045 |
| b | 0.3 | 0.5 | 0.012 | 0.02 |
| c | 0.100 | 0.2 | 0.004 | 0.008 |
| D | 2.82 | 3.02 | 0.111 | 0.119 |
| E | 1.5 | 1.7 | 0.059 | 0.067 |
| E1 | 2.65 | 2.95 | 0.104 | 0.116 |
| e | 0.950 TYP | | 0.037 TYP | |
| e1 | 1.8 | 2 | 0.071 | 0.079 |
| L | 0.3 | 0.6 | 0.012 | 0.024 |
| x | 1.460 TYP | | 0.057 TYP | |
| y | 0.800 TYP | | 0.032 TYP | |
| z | 0.600 TYP | | 0.024 TYP | |
| 0 | 8 | 0 | 8 |
Precautions
- Hall sensors are sensitive devices. Take electrostatic discharge (ESD) protection measures during use and storage.
- Minimize mechanical stress on the device casing and leads during installation and use.
- Recommended soldering temperature should not exceed 350C, with a duration not exceeding 5 seconds.
- To ensure the safety and stability of the Hall chip, it is not recommended to operate beyond the specified parameters for extended periods.
