The **VCXO2EV-B24.576T3** is a high-precision electronic timing component. Based on its nomenclature, it is a **Voltage Controlled Crystal Oscillator (VCXO)**. These components are essential in circuits where the output frequency needs to be fine-tuned or synchronized with an external signal. --- ### 1. Technical Specifications Breakdown | Feature | Specification | Description | | :--- | :--- | :--- | | **Nominal Frequency** | 24.576 MHz | The primary operating frequency. | | **Component Type** | VCXO | Voltage Controlled Crystal Oscillator. | | **Control Voltage** | Variable | Allows for minor adjustments to the output frequency. | | **Output Type** | CMOS / TTL | Typically provides a square wave output compatible with standard logic. | | **Package Style** | SMD (Surface Mount) | Designed for automated PCB assembly. | | **Stability** | ±20ppm to ±50ppm | Varies by sub-model, representing frequency drift over temperature. | --- ### 2. Key Components & Working Principle A VCXO functions by integrating a quartz crystal with a **Varactor Diode** (a voltage-variable capacitor). 1. **Quartz Crystal:** Provides the stable mechanical resonance at 24.576 MHz. 2. **Varactor Diode:** When a "Control Voltage" is applied to the tuning pin, the capacitance of this diode changes. 3. **Frequency Pulling:** The change in capacitance shifts the resonant frequency of the crystal slightly (usually measured in Parts Per Million - PPM). This allows the system to "lock" onto other frequencies. --- ### 3. Common Applications The specific frequency of **24.576 MHz** is a standard multiple used in high-fidelity audio and telecommunications: * **Audio Systems:** It is exactly $512 \times 48\text{ kHz}$, making it ideal for professional audio Master Clocks (sampling rates of 48kHz, 96kHz, or 192kHz). * **Phase-Locked Loops (PLL):** Used as a reference clock that can be adjusted to match an incoming data stream. * **Jitter Attenuation:** Used to "clean up" noisy clock signals in digital-to-analog converters (DACs). --- ### 4. Pin Configuration (Typical 4 or 6-pin SMD) | Pin | Function | Purpose | | :--- | :--- | :--- | | **VC** | Voltage Control | Input pin to adjust the frequency. | | **GND** | Ground | Negative supply/Reference. | | **OUT** | RF Output | The 24.576 MHz clock signal. | | **Vcc** | Supply Voltage | Power input (usually 3.3V or 5V). | | **OE** | Output Enable | (Optional) Turns the output on or off. |