The **M3A13FAD-R** belongs to the family of high-performance crystal oscillators, typically manufactured by **MtronPTI**. These components are critical for providing a stable clock signal in high-reliability communications and aerospace electronics. --- ### 1. Technical Specifications Table The part number "M3A" typically follows a specific nomenclature for SMD (Surface Mount Device) oscillators. | Parameter | Specification (Typical) | | :--- | :--- | | **Component Type** | Crystal Oscillator (XO) | | **Package Size** | 5.0 x 7.0 mm (6-pad SMD) | | **Output Type** | LVPECL (Low-Voltage Positive Emitter-Coupled Logic) | | **Supply Voltage** | 3.3V DC | | **Frequency Stability** | ±50 ppm (standard for '13' series) | | **Operating Temperature** | -40°C to +85°C (Industrial Grade) | | **RoHS Status** | Compliant (indicated by -R) | --- ### 2. Breakdown of the Part Number The alphanumeric code identifies specific electronic characteristics: * **M3A:** Series designator for 3.3V LVPECL Surface Mount Oscillators. * **13:** Code for Frequency Stability and Operating Temperature range (usually ±50ppm over -40/+85°C). * **F:** Frequency code or specialized internal tuning. * **AD:** Likely denotes specific output Enable/Disable functionality (Tri-state). * **-R:** Indicates RoHS compliance (Lead-free). --- ### 3. Key Electronic Features * **LVPECL Output:** This differential signaling method is used for high-speed data transfer. It offers excellent noise immunity and low jitter, making it ideal for fiber optics and Ethernet backplanes. * **Tri-State Functionality:** Pin 1 is usually an "Enable/Disable" pin. When low, the output goes to a high-impedance state, allowing for power saving and bus sharing. * **Hermetically Sealed:** The internal quartz crystal is housed in a ceramic package with a metal lid to protect against atmospheric moisture and aging. --- ### 4. Circuit Implementation When integrating this part into a PCB design, the following termination is typically required for the LVPECL output: ```c // Standard LVPECL Termination Schematic Logic [VCC (3.3V)] -- [50 Ohm Resistor] -- [Output Pin] | [Transmission Line] | [VCC - 2V] -- [50 Ohm Resistor] ----| ``` ---