## Technical Overview: CSTCE12M0G55-R0 The **CSTCE12M0G55-R0** is a specific model of a **Ceramic Resonator** manufactured by **Murata Electronics**. It belongs to the CERALOCK® family, which is widely used as a timing component in microcontrollers and other digital circuits. --- ### 1. Key Technical Specifications | Parameter | Specification | |:---|:---| | **Nominal Frequency** | 12.000 MHz | | **Frequency Tolerance** | ±0.5% | | **Operating Temperature** | -20°C to +80°C | | **Load Capacitance** | 33 pF (Internal) | | **Mounting Type** | Surface Mount (SMD) | | **Package Size** | 3.2 x 1.3 mm | | **Frequency Aging** | ±0.3% (over 10 years) | --- ### 2. Internal Components and Design Unlike a standard quartz crystal which requires external load capacitors to oscillate, the **CSTCE** series features **Built-in Load Capacitors**. * **Piezoelectric Element:** A ceramic substrate that vibrates at a specific frequency when a voltage is applied. * **Built-in Capacitance:** The "-55" suffix in the part number indicates specific internal load capacitors (33pF). This simplifies PCB design and saves space. * **3-Terminal Design:** 1. **Input** (Terminal 1) 2. **Ground** (Terminal 2 - Center) 3. **Output** (Terminal 3) --- ### 3. Comparison: Ceramic Resonator vs. Quartz Crystal | Feature | Ceramic Resonator (CSTCE) | Quartz Crystal | |:---|:---|:---| | **Accuracy** | Moderate (±0.5%) | High (±0.001%) | | **Cost** | Low | Higher | | **Start-up Time** | Very Fast | Slower | | **Size** | Smaller (Integrated Caps) | Larger (Requires External Caps) | --- ### 4. Typical Application Circuit In a microcontroller (MCU) circuit, the resonator is connected to the `OSC_IN` and `OSC_OUT` pins. ```markdown Microcontroller +-------------+ | | | OSC_IN |----[ Terminal 1 ] | | | | GND |----[ Terminal 2 ] (GND) | | | | OSC_OUT |----[ Terminal 3 ] | | +-------------+ ``` --- ### 5. Common Use Cases * **Consumer Electronics:** Remote controls, toys, and small appliances. * **Computer Peripherals:** USB devices, keyboards, and mice. * **Industrial:** Simple sensor nodes where high-precision timing (like Real-Time Clocks) is not required.