## Technical Overview of CSTCE19M2V53-R0 The **CSTCE19M2V53-R0** is a high-precision **Ceramic Resonator** manufactured by Murata Electronics. It belongs to the CERALOCK® series and is primarily used as a clock source for microcontrollers. --- ### 1. Key Technical Specifications | Feature | Specification | | :--- | :--- | | **Nominal Frequency** | 19.200 MHz | | **Frequency Tolerance** | ±0.5% | | **Frequency Stability** | ±0.3% (over temperature) | | **Operating Temperature** | -20°C to +80°C | | **Capacitance (Built-in)** | 15 pF (Internal Load Capacitors) | | **Package Type** | SMD (Surface Mount Device) | | **Dimensions** | 3.2 x 1.3 mm (Small Form Factor) | --- ### 2. Physical Structure and Pinout Unlike standard crystals that require external load capacitors, this "CERALOCK" part features **built-in load capacitors**. This saves PCB space and reduces the external component count. * **Terminal Configuration:** 3-terminal structure. * **Pin 1:** Input * **Pin 2:** Ground (GND) * **Pin 3:** Output --- ### 3. Comparison: Ceramic Resonator vs. Quartz Crystal | Feature | Ceramic Resonator (CSTCE) | Quartz Crystal | | :--- | :--- | :--- | | **Cost** | Lower | Higher | | **Start-up Time** | Faster | Slower | | **Precision** | Moderate (±0.5%) | High (±0.001%) | | **Footprint** | Smaller (Integrated Caps) | Larger (Requires Ext. Caps) | --- ### 4. Application Areas The 19.2 MHz frequency is commonly used in: 1. **Microcontroller Clocking:** Providing the heartbeat for 8-bit, 16-bit, and 32-bit MCUs. 2. **Consumer Electronics:** Remote controls, toys, and small appliances. 3. **Communication:** Low-speed data transfer protocols where high precision isn't critical. 4. **USB Interfaces:** Often used in non-high-speed USB peripherals. --- ### 5. Circuit Integration When designing a PCB for this part, the middle pin must be connected directly to the system ground. The input and output pins are connected to the `OSC_IN` and `OSC_OUT` pins of the microcontroller. ```c // Example code conceptualization (Setting MCU clock to use external resonator) // Note: Register names vary by MCU (e.g., STM32, AVR) void SystemClock_Config(void) { RCC_OscInitTypeDef RCC_OscInitStruct = {0}; // Enable High Speed External (HSE) clock RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE; RCC_OscInitStruct.HSEState = RCC_HSE_ON; // Uses the 19.2MHz resonator HAL_RCC_OscConfig(&RCC_OscInitStruct); } ```