The **LSMT2-14560-R** is a high-performance, surface-mount (SMT) magnetic buzzer/transducer designed for compact electronic devices. It is widely used in automotive, industrial, and consumer electronics where a loud, clear notification sound is required within a small footprint. --- ### 1. Key Technical Specifications The following table outlines the primary electrical and mechanical characteristics of the component: | Parameter | Specification | | :--- | :--- | | **Transducer Type** | Magnetic / Electromagnetic | | **Operating Voltage** | 3.0V - 7.0V (Typical 5.0V) | | **Rated Current** | Max 80mA | | **Sound Pressure Level (SPL)** | ≥ 85dB at 10cm | | **Resonant Frequency** | 2,700 Hz | | **Coil Resistance** | 31 ± 5 Ω | | **Operating Temperature** | -40°C to +85°C | | **Mounting Type** | Surface Mount (SMD) | --- ### 2. Functional Description Unlike an "active" buzzer, the LSMT2-14560-R is a **transducer**. This means it does not have internal circuitry to generate a tone. - **Drive Requirement:** It requires an external square wave (AC signal) to oscillate the internal diaphragm. - **Magnetic Operation:** When the square wave passes through the internal coil, it creates a fluctuating magnetic field that moves a metal disk, producing sound waves. - **Frequency Tuning:** For maximum volume, the input signal should match the resonant frequency (2.7 kHz). --- ### 3. Application Circuitry To drive this part using a microcontroller (like an Arduino or ESP32), a simple transistor circuit is recommended to protect the I/O pins from the high current draw. ```cpp // Example: Driving the LSMT2-14560-R with Arduino void setup() { pinMode(9, OUTPUT); // Connect to base of NPN transistor } void loop() { tone(9, 2700); // Generate 2700Hz square wave delay(500); // Beep for 0.5 seconds noTone(9); // Silence delay(1000); // Wait for 1 second } ``` --- ### 4. Physical Dimensions & Material - **Size:** Approximately 14mm x 14mm (base) with a height of 6mm. - **Housing:** High-temperature plastic (LCP) capable of withstanding lead-free reflow soldering processes. - **Polarity:** Marked with a "+" sign on the casing to ensure correct phase alignment in multi-speaker setups. ---