The **CSTCE14M7V51-R0** is a miniature surface-mount (SMD) ceramic resonator developed by Murata Electronics. It belongs to the **CERALOCK®** product line, specifically the CSTCE series, which features built-in load capacitors to simplify circuit design. --- ## 1. Technical Specifications Below are the primary technical characteristics of the component: | Parameter | Specification | | :--- | :--- | | **Oscillation Frequency** | 14.7456 MHz | | **Frequency Tolerance** | ±0.5% | | **Frequency Stability** | ±0.3% | | **Operating Temperature** | -20°C to +80°C | | **Built-in Capacitance** | 5 pF | | **Package Size** | 3.2 x 1.3 mm (EIA 1205) | | **Mounting Type** | Surface Mount (SMD) | --- ## 2. Key Features and Design ### Internal Structure The "V" in the part number indicates a specific high-frequency structural design. Unlike standard quartz crystals, ceramic resonators utilize the mechanical vibration of piezoelectric ceramics. * **Built-in Capacitors:** This part includes two 5pF internal load capacitors. This eliminates the need for two external capacitors on your PCB, saving space and reducing the Bill of Materials (BOM) cost. * **Three-Terminal Design:** The center pin is grounded, while the two outer pins are the input/output for the oscillation circuit. ### Comparison: Ceramic vs. Quartz * **Size:** Ceramic resonators like the CSTCE are generally smaller and thinner than traditional quartz crystals. * **Cost:** Significantly cheaper than quartz. * **Start-up Time:** They have a faster start-up time (typically <1ms) compared to quartz crystals. * **Accuracy:** They are less accurate than quartz (±0.5% vs. ±0.005%). They are suitable for microcontrollers but not for high-precision timing like Real-Time Clocks (RTC). --- ## 3. Application and Usage This specific frequency (14.7456 MHz) is highly common in digital electronics for one primary reason: **Baud Rate Generation.** * **UART Communication:** 14.7456 MHz is an integer multiple of standard baud rates (like 9600, 19200, 115200). Using this frequency ensures 0% error in serial communication timing. * **Microcontrollers:** Used as the external clock source for 8-bit or 32-bit MCUs (AVR, PIC, STM32) in industrial and consumer electronics. * **USB/Peripherals:** Used in devices where high-speed serial data transfer is required but extreme frequency stability over years is not critical. --- ## 4. Part Number Breakdown ```text CST CE 14M7 V 5 1 -R0 | | | | | | | | | | | | | └── Packaging (Plastic Taping) | | | | | └────── Capacitance Tolerance (Standard) | | | | └───────── Built-in Capacitance (5pF) | | | └──────────── Frequency / Initial Tolerance Type | | └──────────────── Nominal Frequency (14.7456 MHz) | └───────────────────── Series Name (Small SMD type) └────────────────────────── Ceramic Resonator (CERALOCK) ```