The **M3V68T2CJ-R** is a specific surface-mount component, typically classified as a **Voltage Controlled Crystal Oscillator (VCXO)** or a high-stability clock oscillator. These parts are critical in telecommunications and high-speed data transmission for maintaining precise timing frequencies. --- ### 1. Technical Specifications Below are the typical technical parameters associated with this part number series (often manufactured by companies like **Epson** or **MtronPTI**): | Feature | Specification | | :--- | :--- | | **Component Type** | VCXO (Voltage Controlled Crystal Oscillator) | | **Package Type** | SMD (Surface Mount Device) | | **Standard Frequency** | Varies (e.g., 622.08 MHz, 155.52 MHz) | | **Supply Voltage ($V_{cc}$)** | Typically 3.3V | | **Output Type** | LVPECL or LVDS (Differential signals) | | **Operating Temperature** | -40°C to +85°C (Industrial Grade) | | **Frequency Stability** | ±20 ppm to ±50 ppm | --- ### 2. Key Internal Components The "M3V" series architecture generally consists of three main electronic stages: 1. **Quartz Crystal Blank:** The heart of the component, providing the fundamental resonance. 2. **Varactor Diode:** Used to "pull" or adjust the frequency based on an external control voltage ($V_c$). 3. **Oscillator IC:** An integrated circuit that manages the drive level, temperature compensation, and output buffering (converting the sine wave to a square differential signal). --- ### 3. Pinout Configuration Most oscillators in this series follow a standard 6-pin layout: | Pin Number | Function | Description | | :--- | :--- | :--- | | **1** | **$V_c$ (Control Voltage)** | Adjusts the output frequency. | | **2** | **OE (Output Enable)** | Enables or disables the output signal. | | **3** | **GND** | System Ground. | | **4** | **Output** | Main clock signal. | | **5** | **Complementary Output** | Inverted clock signal (for differential pairs). | | **6** | **$V_{cc}$** | Positive Supply Voltage. | --- ### 4. Application Use-Cases * **SONET/SDH Equipment:** Used in optical networking for jitter attenuation. * **Phase-Locked Loops (PLLs):** Acts as the slave oscillator in a timing loop. * **Base Stations:** Providing timing for 4G/5G cellular infrastructure. * **Digital Video:** Used in broadcast equipment for frame synchronization. --- ### 5. Part Number Decoding (Example) While specific to the manufacturer, the code usually breaks down as follows: * **M3V:** Series identifier (VCXO, 3.3V). * **68:** Frequency stability/Pulling range code. * **T:** Temperature range (Industrial). * **2CJ:** Package size and Output logic code. * **R:** Packaging (Tape & Reel).