The **M3V23V2AJ-R** is a high-performance **VCXO (Voltage Controlled Crystal Oscillator)** manufactured by **NDK (Nihon Dempa Kogyo)**. It is primarily used in telecommunications and networking infrastructure where precision frequency control and low jitter are critical. --- ### 1. Key Technical Specifications The following table summarizes the primary electrical and physical characteristics of this component: | Parameter | Specifications | | :--- | :--- | | **Component Type** | Voltage Controlled Crystal Oscillator (VCXO) | | **Nominal Frequency** | Generally tailored (often 122.88 MHz or similar high-freq) | | **Supply Voltage (Vcc)** | +3.3V DC (Typical) | | **Output Type** | LV-PECL (Low-Voltage Positive Emitter-Coupled Logic) | | **Frequency Stability** | ±50 ppm (Total frequency stability) | | **Control Voltage Range** | 0.3V to 3.0V (Typical for 3.3V supply) | | **Package Size** | 7.0 x 5.0 mm (6-pad SMD) | | **Operating Temperature** | -40°C to +85°C (Industrial Grade) | --- ### 2. Functional Electronic Parts & Design The "M3V" series integrates several internal electronic stages into a single surface-mount package: * **AT-Cut Quartz Crystal:** The core resonant element providing the fundamental frequency. * **Varactor Diode:** A voltage-variable capacitor used in the feedback loop. By changing the voltage at the "Control" pin, the capacitance changes, allowing the output frequency to be "pulled" or tuned. * **LV-PECL Output Buffer:** This differential output stage is designed for high-speed data transmission. It provides high noise immunity and fast rise/fall times, making it ideal for driving long traces or high-speed clock inputs. * **Integrated Circuit (IC):** An internal ASIC handles the oscillation circuit, temperature compensation, and voltage regulation to ensure stability across varying environmental conditions. --- ### 3. Application Areas Because of the **LV-PECL** output and high frequency, this part is commonly found in: 1. **Optical Transmitters:** Used for clock recovery and synchronization in fiber optic modules. 2. **Base Stations (LTE/5G):** Providing stable reference clocks for RF signal processing. 3. **SONET/SDH Equipment:** Handling high-speed digital hierarchy timing. 4. **PLL Circuits:** Acting as the controlled oscillator in Phase-Locked Loops to synchronize different clock domains. --- ### 4. Part Number Breakdown (Typical NDK Format) * **M3V:** Series identifier (VCXO, 7.0x5.0mm). * **23:** Typically refers to specific output logic and supply voltage (3.3V, LV-PECL). * **V2AJ:** Internal code for frequency tolerance, pulling range, and temperature range. * **-R:** Indicates the part is supplied on **Tape and Reel** for automated assembly.