The **M3V64T2CJ-R** is a specialized electronic component, specifically a **Voltage Controlled Crystal Oscillator (VCXO)** manufactured by Jonson or similar precision timing component specialists. These parts are critical in telecommunications and high-speed data transmission for frequency synchronization. --- ### 1. Component Overview The M3V series represents high-performance oscillators where the output frequency can be adjusted (steered) by an external control voltage. | Feature | Specification Details | | :--- | :--- | | **Component Type** | VCXO (Voltage Controlled Crystal Oscillator) | | **Package Type** | Surface Mount Device (SMD) | | **Output Type** | CMOS / TTL Compatible | | **Supply Voltage** | Typically 3.3V (indicated by the 'V' or '3' series) | | **Common Frequency** | Usually customized (e.g., 27MHz, 122.88MHz, etc.) | --- ### 2. Part Number Breakdown (Typical Coding) While naming conventions vary slightly by manufacturer, the code generally follows this logic: * **M3V**: Series identifier for a 3.3V VCXO. * **64**: Stability/Temperature code (often refers to ±50ppm or specific operating ranges). * **T**: Operating temperature range (e.g., -40°C to +85°C). * **2**: Frequency pullability range (how much the frequency can change via voltage). * **CJ**: Package size and Output logic (e.g., 5.0x7.0mm ceramic). * **-R**: RoHS Compliant (Lead-free) or Tape & Reel packaging. --- ### 3. Key Technical Functions #### A. Frequency Pulling The "Voltage Control" aspect allows the circuit to fine-tune the clock frequency. This is essential for **Phase-Locked Loops (PLLs)** where the local clock must perfectly match an incoming data stream's clock. #### B. Low Phase Jitter Components like the M3V64T2CJ-R are engineered for low jitter, meaning the "timing noise" is minimal. This ensures that high-speed digital systems do not experience data errors. #### C. Tri-State Function Most versions of this part include an "Enable/Disable" pin (Pin 1 or 2), allowing the output to be turned off without powering down the entire system, which is useful for power saving and testing. --- ### 4. Typical Application Circuit In a standard PCB layout, the part utilizes four to six pins: ```markdown Pin 1: Control Voltage (V_c) -> Adjusts Frequency Pin 2: Enable/Disable (E/D) -> Logic High/Low Pin 3: Ground (GND) -> Common Pin 4: Output -> To Processor/FPGA Pin 5: No Connect (N/C) -> (Package dependent) Pin 6: Supply Voltage (Vdd) -> +3.3V ``` --- ### 5. Common Applications * **Networking:** Base stations, routers, and switches. * **Video:** Professional broadcast equipment (SDI/HDMI timing). * **Instrumentation:** Frequency synthesizers and test equipment.