The **M3V13T2J-R** is a high-performance **Voltage Controlled Crystal Oscillator (VCXO)** manufactured by **NDK (Nihon Dempa Kogyo)**. It is part of the M3V series, designed for high-frequency stability and low phase jitter in telecommunications and data networking applications. --- ### 1. Key Technical Specifications | Parameter | Specification | |:---|:---| | **Device Type** | Voltage Controlled Crystal Oscillator (VCXO) | | **Output Type** | CMOS | | **Supply Voltage ($V_{CC}$)** | +3.3V DC | | **Frequency Range** | 1.5 MHz to 54 MHz (Specific to model variant) | | **Operating Temperature** | -40°C to +85°C | | **Package Size** | 7.0 x 5.0 mm (6-pad SMD) | | **Frequency Stability** | ±50 ppm (Standard, includes temperature and aging) | --- ### 2. Internal Electronic Components & Function The device is an integrated module consisting of three primary electronic sections: 1. **Crystal Resonator:** A high-precision quartz crystal cut to a specific frequency. This acts as the mechanical heart of the clock signal. 2. **Varactor Diode:** An electronic component that changes its capacitance based on the voltage applied to the **Control Voltage (Vcont)** pin. This allows the user to "pull" or fine-tune the output frequency. 3. **Oscillator IC:** A low-noise CMOS Integrated Circuit that maintains the oscillation of the crystal and buffers the output signal to drive external loads. --- ### 3. Pin Configuration (6-Pad Layout) | Pin # | Name | Description | |:---:|:---|:---| | **1** | **$V_{cont}$** | Control Voltage (Input to adjust frequency) | | **2** | **OE** | Output Enable (High = Active; Low = High Impedance) | | **3** | **GND** | Ground | | **4** | **OUT** | Clock Signal Output (CMOS) | | **5** | **NC** | No Connection | | **6** | **$V_{CC}$** | Power Supply (+3.3V) | --- ### 4. Applications The M3V13T2J-R is typically used in circuits where the clock signal must be synchronized with an external reference or where slight frequency adjustments are needed to maintain data alignment: * **Phase-Locked Loops (PLL):** Used as the adjustable clock source. * **Networking Gear:** Switches, routers, and base stations. * **Digital Video:** Synchronizing audio/video bitstreams to prevent frame drops. * **SDH/SONET:** Telecommunication synchronization. --- ### 5. Part Number Breakdown * **M3V:** Series Name (3.3V VCXO). * **13:** Specific Frequency Stability/Pulling Range characteristic. * **T2J:** Package and Temperature code. * **-R:** Denotes "Tape and Reel" packaging for automated assembly.