The **CSTCE20M0V13C99-R0** is a specific surface-mount (SMD) ceramic resonator produced by **Murata Manufacturing Co., Ltd.** It is part of the CERALOCK® product line, commonly used as a cost-effective alternative to quartz crystals for providing a clock signal to microcontrollers and digital circuits. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Nominal Frequency** | 20.000 MHz | | **Initial Tolerance** | ±0.1% | | **Temperature Stability** | ±0.08% | | **Operating Temperature** | -40°C to +125°C | | **Built-in Load Capacitance** | 15 pF (Internal) | | **Resonant Impedance** | 40 Ω (Maximum) | | **Package Size** | 3.2 x 1.3 mm (SMD 3213) | --- ### 2. Functional Characteristics #### A. Built-in Load Capacitors The "V" in the part number indicates that this resonator features **built-in load capacitors**. Unlike standard quartz crystals that require two external capacitors (typically 15-33pF) to form the oscillation circuit, this part integrates them internally. * **Benefit:** Reduces the overall component count on the PCB. * **Benefit:** Saves board space and simplifies the trace routing. #### B. Frequency Precision While it offers high stability for a ceramic component, it is important to note that ceramic resonators are generally less precise than quartz crystals. * **Quartz Crystal:** Often ±10 to ±50 ppm. * **CSTCE20M0V13C99-R0:** ±1000 ppm (0.1%). * **Usage:** Ideal for MCUs where timing is not critical for high-speed RF or precise USB communication, but perfect for standard logic processing. #### C. Environmental Durability The part is designed for high reliability and can withstand extreme temperatures (up to 125°C), making it suitable for automotive and industrial applications. --- ### 3. Pinout and Internal Diagram This is a **3-terminal** device. ```text Top View +-----------+ | (1) (3) | Pins (1) and (3): Input/Output (Oscillation) | (2) | Pin (2): Ground (GND) +-----------+ ``` --- ### 4. Typical Application Circuit Because the capacitors are built-in, the connection to a Microcontroller (MCU) is straightforward: ```c MCU (Microcontroller) +-------------------+ | | | OSC_IN OSC_OUT | +----+--------+-----+ | | +------+--------+------+ | | | | [1] [2] [3] Resonator (CSTCE20M0V13C99-R0) | | | | (GND) | +---------------+ ``` --- ### 5. Part Number Breakdown * **CSTCE**: Series (SMD Ceramic Resonator with built-in caps). * **20M0**: Frequency (20.000 MHz). * **V**: Built-in capacitance type. * **13**: Capacitance value code (15 pF). * **C99**: Individual specification (Internal Murata code). * **R0**: Packaging (Plastic tape ø180mm reel).