The **M5R18TQJ-R** is a specific part number belonging to the **M5R series** of high-performance quartz crystal oscillators, typically manufactured by suppliers like **Hosonic Electronic**. These components are critical for providing a stable clock signal in digital circuits. --- ### 1. Technical Specifications Below are the general technical parameters associated with this specific part series: | Feature | Specification | | :--- | :--- | | **Component Type** | Quartz Crystal Oscillator (SPXO) | | **Package Type** | SMD (Surface Mount Device) | | **Package Size** | 7.0 x 5.0 mm (Standard 7050 size) | | **Supply Voltage** | Typically 1.8V, 2.5V, or 3.3V (varies by suffix) | | **Output Type** | CMOS / HCMOS | | **Frequency Stability** | ±25ppm to ±50ppm (standard) | | **Operating Temp** | -40°C to +85°C (Industrial Grade) | --- ### 2. Breakdown of the Part Number While specific manufacturer codes can vary slightly, the nomenclature generally follows this logic: * **M5R**: Series identifier (usually referring to the 7.0x5.0mm footprint). * **18**: Often refers to the operating voltage (e.g., 1.8 Volts). * **T**: Frequency Stability indicator (e.g., ±50ppm). * **Q**: Operating Temperature Range (e.g., Industrial -40 to +85°C). * **J**: Output symmetry/Enable-Disable function. * **-R**: RoHS Compliant / Tape & Reel packaging. --- ### 3. Key Functions and Applications The M5R18TQJ-R serves as the "heartbeat" for electronic systems. Its primary roles include: 1. **Clock Generation:** Providing a precise square wave frequency for microprocessors and FPGAs. 2. **Timing Synchronization:** Ensuring data packets in networking equipment (Ethernet, Switches) are processed at the correct intervals. 3. **Frequency Control:** Used in telecommunications to maintain stable carrier frequencies. #### Typical Applications: * **Networking:** Routers, switches, and fiber optic modules. * **Computing:** Server motherboards and peripheral controllers. * **Industrial:** PLC (Programmable Logic Controllers) and automation sensors. --- ### 4. Hardware Integration (Typical Pinout) Standard 7050 (7x5mm) oscillators use a 4-pad configuration: ```text Pad 1: Tri-state (Enable/Disable) Pad 2: Ground (GND) Pad 3: Output (Clock Signal) Pad 4: Supply Voltage (Vdd) ``` ---