The part number **M5R75TQJ-R** refers to a high-performance **Crystal Oscillator** (specifically a differential output oscillator) manufactured by **MtronPTI**. These components are critical for providing precise timing signals in high-speed networking and telecommunications equipment. --- ### 1. Technical Specifications Below is a breakdown of the key electrical and physical characteristics of this component series: | Feature | Specification | | :--- | :--- | | **Output Type** | LVPECL (Low-Voltage Positive Emitter-Coupled Logic) | | **Supply Voltage** | 3.3V (Typical) | | **Package Size** | 5.0 x 7.0 mm (Surface Mount Device) | | **Frequency Range** | Typically 150MHz to 800MHz (depending on specific dash code) | | **Operating Temperature** | -40°C to +85°C (Industrial Grade) | | **Jitter Performance** | Ultra-low phase jitter (often < 1ps RMS) | --- ### 2. Component Breakdown The alphanumeric code follows a specific nomenclature used by MtronPTI: * **M5R**: Represents the series (5x7mm Leadless Ceramic package, 3.3V LVPECL). * **75**: Denotes the frequency stability (typically ±50ppm or ±25ppm depending on internal binning). * **TQ**: Indicates the temperature range and duty cycle requirements. * **J**: Specific internal revision or frequency code. * **-R**: Indicates compliance with **RoHS** (Restriction of Hazardous Substances) standards. --- ### 3. Key Features and Applications #### Key Features * **Differential Signaling:** Uses LVPECL to minimize electromagnetic interference (EMI) and provide high noise immunity. * **Stability:** High precision over a wide temperature range, making it suitable for outdoor or industrial environments. * **Low Jitter:** Essential for high-speed data transmission where timing errors can lead to bit-error rate (BER) increases. #### Common Applications * **Fiber Channel:** Storage area networks. * **Ethernet:** 10G, 40G, and 100G networking hardware. * **SONET/SDH:** Telecommunication infrastructure. * **FPGA Clocking:** Providing the master clock for high-end Xilinx or Altera FPGA boards. --- ### 4. Typical Circuit Integration When using this part in a PCB design, it is usually integrated as follows: ```markdown 1. Power Supply: Place a 0.01µF to 0.1µF bypass capacitor close to the Vcc pin. 2. Termination: LVPECL outputs require specific termination (usually 50 ohms to Vcc-2V). 3. Layout: Keep differential traces (OUT and OUT-complement) symmetrical to prevent phase skew. ```