The **M7S22FAJ-R** is a specific part number belonging to a series of **Crystal Oscillators**, typically manufactured by companies like **NDK (Nihon Dempa Kogyo)**. These components are essential in electronic circuits for providing a precise and stable clock signal. --- ### 1. Key Technical Specifications Based on the standard nomenclature for this series, here are the general technical characteristics: | Parameter | Typical Value / Description | | :--- | :--- | | **Component Type** | SPXO (Simple Packaged Crystal Oscillator) | | **Frequency Range** | Usually fixed (e.g., 20MHz to 50MHz range) | | **Supply Voltage (Vcc)** | Typically 1.8V, 2.5V, or 3.3V | | **Output Type** | CMOS / TTL Compatible | | **Package Size** | SMD (Surface Mount Device), often 7.0 x 5.0 mm or 5.0 x 3.2 mm | | **Operating Temperature** | -40°C to +85°C (Industrial Grade) | | **Stability** | ±25ppm to ±50ppm | --- ### 2. Breakdown of the Part Number While specific manufacturer datasheets vary slightly, the alphanumeric code generally breaks down as follows: * **M7S**: Series designation (Standard Clock Oscillator). * **22**: Often refers to the supply voltage (e.g., "22" might denote 2.5V or 3.3V compatibility). * **FAJ**: Internal code for frequency stability and temperature range specifications. * **R**: Typically stands for "RoHS Compliant" or "Tape & Reel" packaging. --- ### 3. Functional Components Internally, the M7S22FAJ-R consists of two main parts integrated into a single ceramic package: 1. **Quartz Crystal Blank:** A precision-cut piece of quartz that vibrates at a specific frequency when an electric field is applied (Piezoelectric effect). 2. **Oscillator IC:** An integrated circuit that provides the necessary amplification and feedback to sustain the vibration and converts it into a digital square wave (CMOS). --- ### 4. Common Applications This part is used in high-reliability environments where a steady "heartbeat" for microprocessors is required: * **Networking:** Routers, switches, and modems. * **Industrial:** Programmable Logic Controllers (PLCs) and automation sensors. * **Computing:** Peripherals, SSD controllers, and interface cards. ---