The **M7S45FCJ-R** is a specific part number belonging to a series of high-performance **Oscillators** (specifically Crystal Oscillators) manufactured by **NDK (Nihon Dempa Kogyo)**. These components are vital in electronics for generating a stable clock signal required for the timing of microprocessors and digital circuits. --- ## 1. Technical Specifications Below is a breakdown of the typical electronic characteristics for the M7S series, specifically the 45FCJ-R variant: | Parameter | Specification | Details | | :--- | :--- | :--- | | **Component Type** | SPXO | Simple Packaged Crystal Oscillator | | **Output Type** | CMOS | Complementary Metal-Oxide-Semiconductor | | **Supply Voltage ($V_{cc}$)** | 3.3V / 5.0V | Dependent on specific sub-rating (Standard is 5.0V) | | **Frequency Stability** | ±50 ppm / ±100 ppm | Variations exist based on the suffix | | **Package Size** | 7.0 x 5.0 mm | Standard 4-pad Ceramic SMD Package | | **Operating Temp** | -10°C to +70°C | Standard industrial/commercial range | | **RoHS Status** | Compliant | Lead-free and environmentally regulated | --- ## 2. Key Features The "M7S" series is known for several architectural advantages: * **Low Power Consumption:** Optimized for battery-operated or energy-efficient devices. * **Tri-state Function:** Includes a Standby/Enable-Disable function on Pin 1, allowing the output to go into a high-impedance state to save power when the clock is not needed. * **Durability:** Housed in a hermetically sealed ceramic package, providing high resistance to moisture and mechanical shock. * **Broad Frequency Range:** While the specific frequency is determined by the full part code, this series supports frequencies from 1 MHz up to 125 MHz. --- ## 3. Pin Configuration The device typically follows the industry-standard 4-pad layout for 7050 (7.0 x 5.0 mm) oscillators: | Pin Number | Function | Description | | :--- | :--- | :--- | | **1** | Standby (ST) | High or Open = Output Active; Low = High Impedance | | **2** | GND | Ground connection | | **3** | OUT | Clock frequency output | | **4** | $V_{cc}$ | Power supply voltage | --- ## 4. Common Applications The M7S45FCJ-R is commonly found in the following electronic systems: * **Networking Gear:** Routers, switches, and modems. * **Industrial Automation:** PLC (Programmable Logic Controllers) and sensor hubs. * **Consumer Electronics:** Audio/Video equipment requiring stable timing. * **PC Peripherals:** USB controllers and interface cards. --- ### Comparison Table: M7S vs. Typical XO | Feature | M7S Series | Standard Generic XO | | :--- | :--- | :--- | | **Reliability** | High (NDK Standard) | Variable | | **Jitter** | Low Peak-to-Peak | Moderate | | **Sealing** | Seam Welded | Often Glue Sealed | ---