## Technical Overview: CSTCE13M5V53-R0 The **CSTCE13M5V53-R0** is a specific model of a **Ceramic Resonator** manufactured by Murata Electronics. It belongs to the CERALOCK® family, which are high-reliability timing devices used as an alternative to quartz crystals in microcomputer peripheral circuits. --- ### 1. Key Technical Specifications | Parameter | Specification | | :--- | :--- | | **Nominal Frequency** | 13.56 MHz | | **Frequency Tolerance** | ±0.5% | | **Resonant Impedance** | 30 $\Omega$ (Max) | | **Built-in Load Capacitance** | 15 pF | | **Temperature Range** | -20°C to +80°C | | **Mounting Type** | Surface Mount (SMD) | | **Package Size** | 3.2 x 1.3 mm (1205 size) | --- ### 2. Functional Characteristics #### Built-in Capacitance Unlike traditional quartz crystals that require external load capacitors to start and maintain oscillation, the **CSTCE** series features built-in load capacitors. This provides several advantages: * **Space Saving:** Reduces the number of external components on the PCB. * **Cost Reduction:** Lowers BOM (Bill of Materials) costs. * **Stability:** Improves oscillation stability by minimizing stray capacitance. #### Frequency vs. Stability Ceramic resonators occupy a middle ground between RC (Resistor-Capacitor) oscillators and Quartz Crystals: * **Higher Accuracy than RC:** They are far more stable and precise than simple RC circuits. * **Lower Accuracy than Quartz:** They have wider tolerances (±0.5%) compared to quartz crystals (usually measured in PPM), making them unsuitable for high-precision timing (like Real-Time Clocks) but perfect for general microcontroller clocking. --- ### 3. Pin Configuration & Circuitry The device is a **3-terminal** component. | Pin Number | Function | Connection | | :--- | :--- | :--- | | **1** | Input | Connected to MCU Osc_In | | **2** | Ground | Connected to System GND | | **3** | Output | Connected to MCU Osc_Out | #### Typical Application Circuit ```text [ Microcontroller ] / \ [Osc_In] [Osc_Out] | | | [CSTCE] | +----[ 1 ] [ 3 ]----+ [ 2 ] | [GND] ``` --- ### 4. Common Applications * **NFC/RFID Readers:** 13.56 MHz is the standard frequency for Near Field Communication (NFC). * **Microcontrollers (MCUs):** Serving as the main system clock for 8-bit or 16-bit processors. * **Consumer Electronics:** Remote controls, toys, and small home appliances. * **Automotive:** Non-safety critical systems like infotainment or body control modules.