The part number **M7S55TAJ-R** refers to a high-performance **Crystal Oscillator** (specifically a SPXO - Simple Packaged Crystal Oscillator) manufactured by **Mercury Electronic**. Below is a detailed breakdown of its electronic characteristics and technical specifications. --- ### 1. Technical Specifications This component is designed for precision timing and frequency control in digital circuits. | Parameter | Specification (Typical) | | :--- | :--- | | **Component Type** | CMOS Output Crystal Oscillator | | **Frequency Range** | 1.0 MHz to 170.0 MHz (Specific to exact sub-model) | | **Supply Voltage (Vdd)** | +3.3V (Common for the '7S' series) | | **Package Size** | 7.0 x 5.0 mm (SMD Ceramic Package) | | **Output Type** | CMOS / TTL compatible | | **Operating Temperature** | -40°C to +85°C (Industrial Grade) | | **Stability** | ±25ppm to ±100ppm | --- ### 2. Part Number Breakdown The nomenclature used by Mercury Electronic helps identify the specific features of the part: * **M7S**: Represents the series/package type (7.0 x 5.0mm Surface Mount Device). * **55**: Typically denotes the supply voltage (e.g., 5.0V or 3.3V variants) and frequency stability. * **T**: Standby or Tri-state function (allows the output to be disabled to save power). * **AJ**: Specific internal coding for temperature range and frequency tolerance. * **R**: Tape & Reel packaging for automated PCB assembly. --- ### 3. Key Electronic Features * **Tri-State Functionality:** Pin 1 is usually the "Enable/Disable" pin. When set to low, the output goes into a high-impedance state, reducing power consumption. * **Low Phase Jitter:** Designed for high-speed data applications where timing precision is critical to avoid data corruption. * **Hermetically Sealed:** The ceramic package is seam-sealed to protect the quartz crystal from environmental humidity and oxidation. --- ### 4. Common Applications Due to its standard 7050 footprint and CMOS output, it is commonly used in: 1. **Networking:** Ethernet switches, routers, and modems. 2. **Computing:** Motherboards, storage servers, and peripheral controllers. 3. **Industrial:** PLC controllers and embedded systems. 4. **Consumer Electronics:** High-definition video equipment and digital audio interfaces. ---