The **M3V13TAJ-R** is a high-performance **Voltage Controlled Crystal Oscillator (VCXO)** manufactured by MtronPTI. It is designed for precision timing and frequency control in telecommunications and networking hardware. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Component Type** | VCXO (Voltage Controlled Crystal Oscillator) | | **Output Type** | LVPECL (Low-Voltage Positive Emitter-Coupled Logic) | | **Supply Voltage (Vcc)** | 3.3 V | | **Package Style** | Surface Mount (SMD), 6-pad | | **Frequency Range** | Typically 1.5 MHz to 170 MHz (specific to sub-model) | | **Operating Temperature** | -40°C to +85°C (Industrial Grade) | | **Frequency Stability** | ±20 ppm to ±50 ppm | --- ### 2. Core Functional Components The "electronic parts" within this specific module work together to provide a stable, tunable frequency: 1. **Quartz Crystal Resonator:** The heart of the device, providing the fundamental frequency through mechanical vibration. 2. **Varactor Diode:** This acts as a variable capacitor. By changing the voltage on the "Control Voltage" pin, the capacitance changes, which slightly pulls the crystal frequency up or down. 3. **LVPECL Output Driver:** A high-speed differential output stage. LVPECL is used because it provides excellent noise immunity and very low jitter, which is critical for high-speed data transmission. 4. **Voltage Regulator/Bias Circuitry:** Internal circuitry that ensures the internal oscillator remains stable even if there are slight fluctuations in the input power supply. --- ### 3. Pin Configuration (Typical 6-Pad SMD) | Pin # | Function | Description | | :--- | :--- | :--- | | **1** | **Control Voltage** | The input voltage used to "pull" or adjust the frequency. | | **2** | **Enable/Disable** | Allows the output to be turned on or off for power saving. | | **3** | **GND** | Circuit ground. | | **4** | **Output** | Main LVPECL frequency output. | | **5** | **Complementary Output** | Inverted LVPECL output (for differential signaling). | | **6** | **Vcc** | +3.3V Power Supply. | --- ### 4. Typical Applications * **SONET/SDH/ATM:** Synchronization in fiber optic networks. * **Phase Locked Loops (PLL):** Used as the tunable element in frequency synthesis. * **Wireless Base Stations:** Providing stable clock signals for cellular infrastructure. * **Ethernet Switches:** High-speed data clocking.