The **CSTCC2M12G56-R0** is a specific surface-mount ceramic resonator manufactured by **Murata Electronics**. It belongs to the CERALOCK® family, which are components used to provide stable clock signals for microprocessors and other digital circuits. --- ## 1. Technical Specifications Below are the primary electrical and physical parameters for this part: | Parameter | Specification | | :--- | :--- | | **Oscillation Frequency** | 2.12 MHz | | **Frequency Tolerance** | ±0.5% (Typical) | | **Operating Temperature Range** | -20°C to +80°C | | **Load Capacitance (Built-in)** | 47 pF (Internal capacitors included) | | **Frequency Stability** | ±0.3% over temperature | | **Mounting Type** | Surface Mount (SMD) | | **Package Type** | Chip (Non-Washable) | --- ## 2. Key Features and Functions ### A. Integrated Capacitors Unlike traditional quartz crystals that require two external "load capacitors" to complete the oscillation circuit, the **CSTCC** series has these capacitors **built-in**. * **Advantage:** Saves PCB space and reduces component count. * **Terminal Layout:** It typically has 3 terminals (Input, Ground, Output). ### B. Ceramic vs. Quartz Crystal The CSTCC is a **Ceramic Resonator**. While it serves the same purpose as a quartz crystal (generating a clock signal), it has different characteristics: * **Starting Time:** Ceramic resonators start oscillating much faster than quartz crystals. * **Size:** They are generally smaller and thinner. * **Precision:** They are less precise than quartz but much cheaper and more durable against physical shock. ### C. Application Usage This specific 2.12 MHz frequency is commonly used in: * Low-speed microcontrollers. * Automotive electronics (Remote Keyless Entry). * Consumer electronics (Remote controls, basic appliances). --- ## 3. Circuit Configuration To use this part, it is typically connected to the `OSC_IN` and `OSC_OUT` pins of an IC. Because the capacitors are internal, the center pin must be connected to **Ground (GND)**. ```mermaid graph LR A[MCU OSC_IN] --- B(Resonator Terminal 1) C[GND] --- D(Resonator Terminal 2 / Center) E[MCU OSC_OUT] --- F(Resonator Terminal 3) ``` --- ## 4. Part Number Breakdown * **CSTCC**: Series name (SMD ceramic resonator with built-in caps). * **2M12**: Frequency (2.12 MHz). * **G**: Frequency tolerance code. * **56**: Specific internal design/capacitance code. * **R0**: Packaging code (usually refers to Tape and Reel).