The **M3E14XPD-R** is a high-performance, differential output crystal oscillator (XO) designed primarily for high-speed networking and telecommunications applications. It belongs to the M3E family manufactured by **MtronPTI**. --- ## 1. Technical Specifications The M3E14XPD-R is characterized by its use of **LVPECL** (Low-Voltage Positive Emitter-Coupled Logic) and its compact surface-mount design. | Parameter | Specification | | :--- | :--- | | **Logic Type** | LVPECL (Differential) | | **Supply Voltage (Vcc)** | 3.3 V | | **Frequency Range** | Typically 50 MHz to 250 MHz (varies by sub-model) | | **Package Size** | 5.0 x 7.0 mm (6-pad SMD) | | **Stability** | ±20ppm to ±100ppm (Operating Temperature dependent) | | **Operating Temperature** | -40°C to +85°C (Industrial Grade) | | **Jitter Performance** | Ultra-low sub-picosecond phase jitter | --- ## 2. Key Electronic Features ### A. LVPECL Output The "XP" in the part number signifies its **LVPECL** output. This is a differential signaling standard that provides: * **High Speed:** Excellent for clocking high-speed serial links. * **Noise Immunity:** Being differential, it is resistant to common-mode noise. * **Low Jitter:** Critical for maintaining signal integrity in 10GbE or Fiber Channel apps. ### B. Phase Noise and Jitter The internal circuitry is optimized for **low phase noise**. In modern digital systems, high jitter causes bit errors; the M3E series is engineered to provide a clean clock reference for SerDes (Serializer/Deserializer) and FPGAs. ### C. Tri-State Functionality The device includes an "Enable/Disable" function (often on Pin 1). * **High (or Floating):** The oscillator outputs the signal. * **Low:** The output enters a high-impedance state, reducing power consumption and allowing for system testing. --- ## 3. Pin Configuration The M3E14XPD-R follows the industry-standard 6-pad 5x7mm layout: | Pin Number | Function | Description | | :--- | :--- | :--- | | **1** | E/D or NC | Enable/Disable (Tri-state) | | **2** | NC | No Connection | | **3** | GND | Case Ground | | **4** | Output | Main Clock Output | | **5** | Comp Output | Complementary Clock Output | | **6** | Vcc | Supply Voltage (+3.3V) | --- ## 4. Typical Applications Due to its stability and high-frequency capabilities, it is commonly found in: * **Ethernet Switches/Routers:** 1G, 10G, and 40G interfaces. * **Fiber Channel:** Storage Area Networks (SAN). * **SONET/SDH:** Optical transmission equipment. * **Data Centers:** Server motherboards and acceleration cards.