Based on the part number provided, the **M8R18TAJ-R** is a specific type of **Crystal Oscillator**, typically manufactured by companies like *Mercury Electronic* or similar precision timing component providers. These components are essential in electronic circuits for generating a stable clock signal required for microprocessors, communication modules, and digital systems. --- ## 1. Technical Specifications The part number is a coded string representing the physical and electrical characteristics of the oscillator. | Parameter | Typical Specification | | :--- | :--- | | **Component Type** | Clock Oscillator (SPXO) | | **Package Size** | 7.0 x 5.0 mm (SMD) | | **Frequency Range** | Typically 1.0 MHz to 156.25 MHz (Model specific) | | **Operating Voltage** | 1.8V, 2.5V, or 3.3V (TAJ usually denotes 3.3V) | | **Output Type** | CMOS / HCMOS | | **Frequency Stability** | ±25ppm to ±100ppm | | **Operating Temp** | -40°C to +85°C (Industrial Grade) | --- ## 2. Part Number Breakdown (Decoded) While prefixes vary slightly by manufacturer, the **M8R** series generally follows this logic: * **M8R**: Series designation (Surface Mount 7x5mm, 3.3V/5V supply). * **18**: Represents frequency stability (e.g., 18 might correlate to a specific ppm or voltage variant). * **TAJ**: * **T**: Tri-state function (Pin 1 can be used to enable/disable the output). * **A**: Temperature range (e.g., -10 to +70°C). * **J**: Specific package height or output symmetry. * **-R**: RoHS Compliant (Lead-free). --- ## 3. Key Features * **Tri-state Functionality:** Allows the output to be placed in a high-impedance state, which is useful for testing or power-saving modes. * **Low Phase Jitter:** Designed for high-speed data transmission where timing precision is critical. * **SMD Package:** The 7x5mm footprint is a standard industrial size, making it easily replaceable with alternatives from Epson, CTS, or Abracon. --- ## 4. Pin Configuration For a standard 4-pin 7x5mm oscillator like the M8R series: | Pin | Function | Description | | :--- | :--- | :--- | | **1** | OE or NC | Output Enable (High = Active; Low = High Impedance) | | **2** | GND | Ground | | **3** | Output | Clock Signal Output | | **4** | Vdd | Power Supply (Voltage Input) | ---