The **CSTCC3M45G56-R0** is a surface-mount ceramic resonator produced by **Murata Manufacturing Co., Ltd.** It belongs to the CERALOCK® family, which is widely used as a cost-effective alternative to quartz crystals for providing a stable clock signal to microcontrollers and other digital circuits. --- ## 1. Core Technical Specifications The part number encodes specific characteristics of the component. Below are the key electrical and physical parameters: | Parameter | Specification | | :--- | :--- | | **Oscillation Frequency** | 3.45 MHz | | **Initial Tolerance** | ±0.5% | | **Temperature Stability** | ±0.3% (within -20°C to +80°C) | | **Built-in Capacitance** | 47 pF (Internal load capacitors) | | **Mounting Type** | Surface Mount (SMD) | | **Package Size** | 7.2 x 3.0 mm (approx. "CC" style) | | **Aging Rate** | ±0.3% over 10 years | --- ## 2. Key Features and Design ### Integrated Load Capacitors Unlike traditional 2-pin quartz crystals that require external capacitors (C1 and C2) to complete the oscillation circuit, the **CSTCC** series features **three terminals**. The middle pin is connected to ground, while the outer pins connect to the XTAL input/output of the microcontroller. This saves PCB space and reduces component count. ### Stability vs. Cost * **Precision:** It is more accurate than an internal RC oscillator but less precise than a quartz crystal. * **Startup Time:** Ceramic resonators typically have a faster startup time than quartz crystals, which is beneficial for low-power applications that frequently enter and exit sleep modes. --- ## 3. Circuit Configuration To use this part in a design, the following typical circuit is applied: ```text [MCU] ___________ | | | OSC_IN (1)----[ Resonator ]----(3) OSC_OUT | | | | GND (GND)-------(2) [Middle Pin] |___________| | ▼ Ground ``` --- ## 4. Common Applications * **Microcontrollers:** Serving as the system clock for 8-bit or 16-bit MCUs. * **Consumer Electronics:** Remote colors, small appliances, and toys. * **Industrial Equipment:** Simple timing for control logic where high-precision (like real-time clocks) is not required. ---