The **CSTCE12M2G52-R0** is a miniature ceramic resonator manufactured by **Murata Electronics**. It belongs to the CERALOCK® family and is widely used for clock oscillation in microcontrollers and other timing circuits. --- ### ## Technical Specifications | Parameter | Specification | | :--- | :--- | | **Oscillating Frequency** | 12.000 MHz | | **Frequency Tolerance** | ±0.5% | | **Frequency Stability** | ±0.2% | | **Operating Temperature** | -20°C to +80°C | | **Load Capacitance** | 10 pF (Built-in) | | **Mounting Type** | Surface Mount (SMD) | | **Package Size** | 3.2 x 1.3 mm | --- ### ## Key Features 1. **Built-in Load Capacitors:** This part includes internal load capacitors (10 pF), which eliminates the need for external capacitors on the PCB. This saves space and reduces the Bill of Materials (BOM) cost. 2. **Small Form Factor:** The 3213 (metric) size is extremely small, making it suitable for high-density circuit designs. 3. **High Stability:** While not as precise as a quartz crystal, ceramic resonators offer much better stability than standard RC (Resistor-Capacitor) oscillators. 4. **Fast Startup:** Ceramic resonators generally have a faster oscillation startup time compared to quartz crystals. --- ### ## Internal Structure and Pinout The device typically has **three terminals**: * **Input (Pin 1):** Connected to the oscillator input of the MCU. * **Ground (Pin 2):** Center pin, connected to the system ground. * **Output (Pin 3):** Connected to the oscillator output of the MCU. ### ## Comparison: Ceramic Resonator vs. Quartz Crystal | Feature | Ceramic Resonator (CSTCE) | Quartz Crystal | | :--- | :--- | :--- | | **Accuracy** | Moderate (±0.5%) | High (±0.001%) | | **Cost** | Low | Higher | | **Size** | Very Small | Varies | | **Components** | Internal Capacitors | External Capacitors Needed | --- ### ## Common Applications * **Microcontrollers:** Providing the clock signal for 8-bit or 16-bit MCUs. * **Consumer Electronics:** Remote controls, toys, and small appliances. * **Communication:** USB peripherals and basic data processing units where extreme timing precision (like high-speed Ethernet) is not required.