The **M8R13FAJ-R** is an electronic component, specifically a **Surface Mount Device (SMD) Quartz Crystal Oscillator**. It is commonly used in electronic circuits to provide a stable clock signal or frequency reference. Below is a detailed breakdown of its specifications and electronic characteristics. --- ### 1. General Specifications The part number typically follows a specific nomenclature from manufacturers (such as **MtronPTI** or similar timing component specialists). | Feature | Specification Details | | :--- | :--- | | **Component Type** | Crystal Oscillator (XO) | | **Mounting Type** | Surface Mount (SMD/SMT) | | **Package Size** | 5.0 x 7.0 mm (Commonly) | | **Output Type** | CMOS / TTL | | **Voltage Supply** | Typically 3.3V or 5.0V | | **Frequency Stability** | ±25ppm to ±100ppm (depending on grade) | --- ### 2. Pin Configuration Standard 4-pin or 6-pin configurations are used for these oscillators. For the M8R series, the 4-pin layout is standard: | Pin Number | Function | Description | | :--- | :--- | :--- | | **1** | E/D or NC | Enable/Disable (Tri-state) or No Connect | | **2** | GND | Case Ground/Circuit Ground | | **3** | Output | Frequency Output Signal | | **4** | Vcc | Supply Voltage (+) | --- ### 3. Key Electronic Characteristics * **Tri-State Function:** Pin 1 allows the output to be placed in a high-impedance state. This is useful for testing or power-saving modes where the clock signal needs to be "turned off" without removing power from the Vcc pin. * **Load Capacitance:** These units are designed to drive specific capacitive loads, usually **15pF to 50pF**. * **Duty Cycle:** Typically maintains a **40/60% to 45/55%** symmetry, ensuring the digital pulse is consistent for timing-sensitive microprocessors. * **Startup Time:** High-speed startup, usually within **10ms**, ensuring the system begins processing immediately after power-on. --- ### 4. Common Applications Due to its reliability and standard footprint, the M8R13FAJ-R is found in: * **Networking Gear:** Routers, switches, and modems. * **Embedded Systems:** Microcontrollers (MCUs) requiring an external clock source. * **Industrial Control:** PLCs and automation sensors. * **Consumer Electronics:** Set-top boxes and digital imaging devices. --- ### 5. Implementation Example When designing a PCB for this part, a bypass capacitor is essential to reduce noise on the power line. ```c // Typical Schematic Connection // [Vcc] ----+---- [Pin 4 (Vcc)] // | // [0.1uF Cap] // | // [GND] ----+---- [Pin 2 (GND)] ``` ---