The **M3A13TAG-R** is a high-performance, programmable crystal oscillator (SPXO) manufactured by **MtronPTI**. It is part of the M3A series, which is specifically designed for high-frequency stability and low jitter applications in demanding environments. --- ### ## Technical Specifications Below is a breakdown of the core electronic characteristics of the M3A13TAG-R: | Feature | Specification | | :--- | :--- | | **Output Type** | LVPECL (Low-Voltage Positive Emitter-Coupled Logic) | | **Supply Voltage (Vcc)** | 3.3V (Standard) | | **Frequency Range** | Typically 150 MHz to 1.4 GHz (Configurable) | | **Frequency Stability** | ±20ppm to ±50ppm (Depending on specific grade) | | **Operating Temperature** | -40°C to +85°C (Industrial Grade) | | **Package Size** | 5.0 x 7.0 mm (6-pad Ceramic SMD) | | **Phase Jitter** | < 1ps RMS (typical) | --- ### ## Key Electronic Components & Features ### 1. LVPECL Output Driver The "TAG" designation in the part number refers to the output logic. **LVPECL** is chosen for this component because it provides: * **High-speed switching:** Ideal for frequencies above 100MHz. * **Differential Signaling:** Reduces electromagnetic interference (EMI) and provides high noise immunity. ### 2. Quartz Crystal Resonator Inside the hermetically sealed ceramic package is a high-precision quartz crystal. This acts as the mechanical heart of the component, providing the base resonance that is then multiplied or divided to reach the target frequency. ### 3. Integrated Phase-Locked Loop (PLL) The M3A series often utilizes internal PLL circuitry. This allows the part to be "factory programmable," meaning the manufacturer can set the specific output frequency requested by the engineer without needing a unique crystal for every possible frequency. ### 4. Enable/Disable Function (Pad 1 or 2) This part includes a tri-state function. When the "Enable" pin is pulled low, the output goes into a high-impedance state, reducing power consumption when the clock signal is not needed. --- ### ## Application Areas Due to its high frequency and low jitter, the M3A13TAG-R is commonly found in: * **Networking:** 10GbE, 40GbE, and 100GbE Ethernet switches. * **Fiber Optics:** SONET/SDH and Optical Transport Networks (OTN). * **Storage:** Fiber Channel and SAN equipment. * **FPGA Clocking:** Providing the master clock for high-speed FPGA transceivers. --- ### ## Connection Diagram (Typical 6-Pad Layout) ```text Pad 1: OE (Output Enable) Pad 2: No Connect (or NC) Pad 3: Case Ground (Vee) Pad 4: Output (Q) Pad 5: Complementary Output (/Q) Pad 6: Supply Voltage (Vcc) ```