## Overview of WMS2-6A-R/Q The **WMS2-6A-R/Q** is a high-performance **Micro-Power Hall Effect Switch IC**. These sensors are primarily used for non-contact magnetic sensing, proximity detection, and position switching in low-power electronic devices. --- ### 1. Key Technical Specifications The "6A" variant typically refers to specific sensitivity and voltage thresholds within the WMS2 series. Below are the estimated technical parameters based on the standard datasheet for this family: | Parameter | Value / Range | Unit | | :--- | :--- | :--- | | **Operating Voltage ($V_{DD}$)** | 1.6V to 5.5V | Volts | | **Supply Current (Avg)** | 2.0 - 5.0 | $\mu$A | | **Output Type** | CMOS (Push-Pull) | - | | **Magnetic Type** | Omnipolar (Responds to N and S poles) | - | | **Operating Temperature** | -40 to +85 | °C | | **Switching Frequency** | ~20 - 50 | Hz | --- ### 2. Functional Description #### Magnetic Sensitivity The WMS2-6A series is **Omnipolar**. This means the sensor will turn "ON" (Low output) when either a North or South magnetic pole of sufficient strength is brought near the face of the IC. It turns "OFF" (High output) when the magnetic field is removed. #### Power Management The "Micro-Power" designation is achieved through a **Clocked Sleep Mode**. The IC remains in a sleep state for most of the time (consuming nano-amps) and "wakes up" periodically to sample the magnetic field before returning to sleep. This makes it ideal for battery-operated devices. --- ### 3. Pin Configuration and Package The suffix **R/Q** usually denotes the package style, most commonly found in the **SOT-23** (3-pin) package. | Pin Number | Name | Function | | :--- | :--- | :--- | | 1 | **VDD** | Power Supply Input | | 2 | **OUT** | Output Signal (Active Low) | | 3 | **GND** | Ground | --- ### 4. Application Circuit Example To use this sensor, a simple bypass capacitor is recommended between $V_{DD}$ and $GND$ to stabilize the internal clocking mechanism. ```markdown [ +1.8V to 5.5V ] | +-------+-------+ | | | [C1] [Pin 1] | (0.1uF) (VDD) | | | [Load/MCU Pin] GND -----+-------+-------[Pin 2 (OUT)] | [Pin 3] (GND) ``` --- ### 5. Common Use Cases * **Flip-Phones / Laptops:** Detecting if the lid is closed. * **Smart Meters:** Tamper detection or flow measurement. * **IoT Devices:** Low-power wake-up switches. * **White Goods:** Door position sensing for refrigerators or washers. ---