The **M3V11T1J-R** is a specific part number typically associated with high-precision **Voltage Controlled Crystal Oscillators (VCXO)**, commonly manufactured by specialized frequency control companies like MtronPTI. Below is a detailed breakdown of its electronic characteristics and functional components. --- ### 1. Part Number Specification Breakdown While specific prefixes can vary by manufacturer, the nomenclature for this series generally follows this structure: | Component Code | Meaning | Typical Specification | | :--- | :--- | :--- | | **M3V** | Series Type | Voltage Controlled Crystal Oscillator (VCXO) | | **11** | Operating Voltage | Typically 3.3V DC | | **T** | Temperature Stability | Often denotes ±20ppm to ±50ppm stability | | **1** | Output Type | CMOS / HCMOS compatible | | **J** | Temperature Range | Industrial range (e.g., -40°C to +85°C) | | **-R** | Packaging/Compliance | RoHS Compliant / Tape & Reel | --- ### 2. Core Electronic Components A VCXO like the M3V11T1J-R contains several internal electronic stages integrated into a single surface-mount package: #### A. Quartz Crystal Blank The heart of the component. It is a precision-cut quartz wafer that vibrates at a specific fundamental frequency when an electric field is applied. #### B. Varactor Diode This is the "Control" element. By applying a voltage to the **Control Voltage (Vc)** pin, the capacitance of the internal varactor changes. This shifts the resonant frequency of the quartz crystal slightly, allowing for "frequency pulling." #### C. Oscillator IC (Amplifier & Feedback) An integrated circuit that maintains the oscillation by providing gain and the necessary phase shift. It also includes the output buffer to ensure the signal can drive other digital CMOS inputs without degrading. #### D. Voltage Regulator / Compensation Internal circuitry ensures that minor fluctuations in the supply voltage ($V_{dd}$) do not cause significant frequency drift. --- ### 3. Technical Specifications Table | Feature | Parameter | | :--- | :--- | | **Input Voltage ($V_{dd}$)** | 3.3V DC (±5% or 10%) | | **Frequency Range** | Usually 1.000 MHz to 160.000 MHz (Model dependent) | | **Output Load** | 15pF (Standard CMOS) | | **Pullability** | Typically ±50ppm to ±100ppm | | **Duty Cycle** | 45% / 55% | | **Rise/Fall Time** | < 5ns (Typical for CMOS) | --- ### 4. Typical Application Circuit When integrating this part into a PCB, the following pinout is standard for the SMD package: ```text Pin 1: Voltage Control (Vc) -> Adjusts frequency Pin 2: Tri-state/Enable -> Logic high to enable output Pin 3: Ground (GND) -> System ground Pin 4: Output -> CMOS Signal to MCU/FPGA Pin 5: No Connect (NC) -> Reserved Pin 6: Supply Voltage (Vdd) -> 3.3V Power ``` --- ### 5. Common Use Cases * **Phase-Locked Loops (PLLs):** Used to synchronize two signals. * **Telecommunications:** Clock recovery in SONET/SDH or Ethernet systems. * **Video/Audio:** Fine-tuning clock frequencies to match frame rates or sample rates. * **Frequency Synthesis:** Acting as a tunable reference for higher frequency generation.