Based on the part number **2TT-13-R/C**, this component typically refers to a **Thru-Hole Crystal Oscillator** or a specific type of **Crystal Unit** used for frequency control. These components are essential in digital electronics to provide a stable clock signal. --- ### 1. Component Overview The "2TT" series is often associated with miniature, low-profile quartz crystals. The suffix **-R/C** usually indicates compliance with **RoHS** (Restriction of Hazardous Substances) and specific calibration/temperature stability standards. ### 2. Technical Specifications While specific datasheets can vary by manufacturer (such as TXC or Epson), here are the standard technical characteristics for this category: | Parameter | Typical Value / Description | | :--- | :--- | | **Frequency Range** | Usually 32.768 kHz or high-frequency MHz range | | **Package Type** | Thru-Hole (Cylindrical or DIP) | | **Dimensions** | 2x6mm or 3x8mm (common for 2TT series) | | **Load Capacitance** | 6pF to 12.5pF (standard) | | **Frequency Tolerance** | ±10ppm to ±50ppm | | **Operating Temp** | -20°C to +70°C | --- ### 3. Key Electronic Functions * **Piezoelectric Effect:** The part utilizes a quartz wafer that vibrates at a precise frequency when an electric voltage is applied. * **Timing Reference:** Acts as the "heartbeat" for microcontrollers (MCUs), Real-Time Clocks (RTCs), and communication modules. * **Frequency Stability:** Provides much higher precision than internal RC (Resistor-Capacitor) oscillators built into chips. --- ### 4. Common Applications * **Consumer Electronics:** Digital watches, calculators, and remote controls. * **Computing:** Motherboards and peripheral timing. * **Industrial:** Measuring instruments and sensor synchronization. --- ### 5. Identification Schematic (Internal) In a circuit diagram, the crystal is represented by a symbol consisting of a rectangle between two parallel lines, often labeled as `XTAL` or `Y1`. ```text +-------| |-------+ | | | | ----| Quartz |---- | Plate | +-------| |-------+ ``` ---