The **CSTCC2M45G56-R0_V01** is a surface-mount ceramic resonator produced by **Murata Manufacturing Co., Ltd.** It is part of the CERALOCK® family, designed to provide a stable clock signal for microcontrollers and other timing-sensitive circuits. --- ## 1. Technical Specifications The following table highlights the core electrical and physical characteristics of the component: | Feature | Specification | | :--- | :--- | | **Nominal Frequency** | 2.45 MHz | | **Frequency Tolerance** | ±0.5% | | **Resonant Impedance** | 50 Ω (Maximum) | | **Loading Capacitance** | 47 pF (Built-in) | | **Operating Temperature** | -20°C to +80°C | | **Mounting Type** | Surface Mount (SMD) | | **Package Size** | 7.2 x 3.0 mm (approx.) | --- ## 2. Key Internal Components The CSTCC series is unique because it integrates several functions into a single package: 1. **Piezoelectric Ceramic Element:** The core of the device that vibrates at a specific frequency when an electrical signal is applied. 2. **Built-in Load Capacitors:** Unlike traditional quartz crystals that require external capacitors ($C_1$ and $C_2$) to complete the oscillation circuit, this part has them built-in. This saves PCB space and reduces BOM (Bill of Materials) cost. 3. **Protective Resin/Case:** A ceramic or resin package that protects the vibrating element from environmental factors. --- ## 3. Applications Due to its 2.45 MHz frequency and integrated design, it is commonly used in: * **Microcontrollers:** Serving as the system clock for 8-bit or 16-bit MCUs. * **Consumer Electronics:** Remote controls, white goods (washers/dryers), and toys. * **Communication Equipment:** Low-speed data processing units. --- ## 4. Typical Oscillation Circuit The device features three terminals. The typical connection layout is as follows: ```text [ Microcontroller ] / \ OSC_IN OSC_OUT | | (1)---------------(3) | (2) | [ GND ] ``` * **Terminal 1:** Input * **Terminal 2:** Ground (Common for built-in capacitors) * **Terminal 3:** Output ---