The **CSTCE11M2G55-R0** is a ceramic resonator manufactured by **Murata Electronics**. It belongs to the CERALOCK® family and is widely used for clock generation in microcontrollers and other digital circuits. --- ## 1. General Specifications | Feature | Specification | | :--- | :--- | | **Product Series** | CERALOCK® CSTCE | | **Nominal Frequency** | 11.2 MHz | | **Frequency Tolerance** | ±0.5% | | **Load Capacitance** | 33 pF (Built-in) | | **Temperature Range** | -20°C to +80°C | | **Package Type** | SMD (3.2 x 1.3 mm) | | **Mounting Type** | Surface Mount | --- ## 2. Key Technical Features ### A. Built-in Load Capacitors One of the primary advantages of this specific part is that it includes **built-in load capacitors**. This eliminates the need for two external capacitors on the PCB, saving space and reducing the total Bill of Materials (BOM) cost. ### B. Ceramic vs. Quartz Crystal * **Stability:** It is more stable than an RC oscillator but less precise than a quartz crystal. * **Start-up Time:** Ceramic resonators like this one typically have a faster start-up time than crystals. * **Size:** The SMD 3213 package is extremely small, making it ideal for compact consumer electronics. --- ## 3. Pin Configuration and Circuitry The device has three terminals (pins): 1. **Input:** Connected to the oscillator inverter input. 2. **Ground:** Connected to the system ground (shared by the internal capacitors). 3. **Output:** Connected to the oscillator inverter output. ### Typical Application Circuit ```text MCU / IC +------------+ | OSC_IN |----[ Terminal 1 ] | | | | GND |----[ Terminal 2 (GND) ] | | | | OSC_OUT |----[ Terminal 3 ] +------------+ ``` --- ## 4. Common Applications * **Microcontrollers:** Serving as the main clock source for 8-bit or 16-bit MCUs. * **Consumer Electronics:** Remote controls, toys, and small appliances. * **USB Peripherals:** Devices where a ±0.5% frequency tolerance is acceptable for communication.