Based on the part number **M8R18TCJ-R**, this component is a high-performance **Crystal Oscillator** (often a TCXO - Temperature Compensated Crystal Oscillator) typically manufactured by companies like **NDK** or **Murata** (or specific regional suppliers for automotive/industrial timing). Below is the technical breakdown of the electronic characteristics associated with this specific part series. --- ### 1. Technical Specifications The following table outlines the general electrical characteristics for the M8R series: | Parameter | Typical Value / Range | Unit | | :--- | :--- | :--- | | **Nominal Frequency** | 18.000 (specified by '18') | MHz | | **Supply Voltage (Vcc)** | 1.8V to 3.3V (varies by suffix) | Volts | | **Output Type** | CMOS / Clipped Sine Wave | - | | **Frequency Stability** | ±0.5 to ±2.5 (Temp dependent) | ppm | | **Operating Temperature** | -40 to +85 | °C | | **Package Size** | 2.0 x 1.6 or 2.5 x 2.0 | mm | --- ### 2. Part Number Breakdown (Nomenclature) While exact naming conventions vary slightly by manufacturer, the code generally follows this logic: * **M8R**: The series designation, usually indicating a specific miniature SMD (Surface Mount Device) package and internal IC architecture. * **18**: Indicates the fundamental frequency of **18.000 MHz**. * **T**: Often stands for **Temperature Compensation** (TCXO), ensuring the clock stays precise even as the device heats up. * **CJ**: Specification codes for load capacitance, frequency tolerance, and operating temperature range. * **R**: Typically signifies **Tape & Reel** packaging for automated SMT assembly. --- ### 3. Key Electronic Features * **Low Phase Noise:** Designed for communication modules (GPS, GNSS, Wi-Fi) where signal purity is critical. * **Low Current Consumption:** Optimized for battery-operated mobile devices. * **Tight Stability:** Unlike standard crystals, the "T" (TCXO) circuitry actively compensates for frequency drift caused by environmental temperature changes. --- ### 4. Common Applications 1. **Telecommunications:** Used as a reference clock for RF transceivers. 2. **Navigation Systems:** Essential for GPS modules requiring precise timing to calculate coordinates. 3. **Automotive Electronics:** Used in ADAS (Advanced Driver Assistance Systems) or Infotainment systems. 4. **IoT Devices:** Provides a stable heartbeat for microcontrollers in fluctuating outdoor environments. ---