The **CSBFB500KJ58-R1** is a surface-mount (SMD) ceramic resonator belonging to the CSBFB series, manufactured by **Murata Electronics**. It is primarily used as a frequency-control component in electronic circuits, functioning similarly to a quartz crystal but with a smaller footprint and lower cost. --- ### 1. Technical Specifications The following table highlights the key electrical and physical characteristics of this part: | Parameter | Specification | | :--- | :--- | | **Manufacturer** | Murata Electronics | | **Frequency** | 500 kHz | | **Frequency Tolerance** | ±0.5% | | **Resonant Impedance** | 40 $\Omega$ (Max) | | **Loading Capacitance** | 100 pF (Built-in) | | **Operating Temperature** | -20°C to +80°C | | **Mounting Type** | Surface Mount (SMD) | | **Package Size** | 5.0mm x 3.1mm | --- ### 2. Key Features and Components * **Ceramic Material:** Utilizes the mechanical resonance of piezoelectric ceramics (usually Lead Zirconate Titanate). * **Built-in Load Capacitors:** This specific model includes internal loading capacitors, which simplifies the PCB design by eliminating the need for external capacitors in the oscillation circuit. * **CERALOCK® Technology:** This is Murata's brand name for these resonators, known for being highly stable and resistant to mechanical vibration. * **Small Form Factor:** The "FB" designation indicates a small, low-profile package suitable for high-density surface mounting. --- ### 3. Application Areas Because the frequency is relatively low (500 kHz), it is typically used in the following scenarios: 1. **Microcontroller (MCU) Clocking:** Provides the heartbeat for 8-bit or 16-bit microcontrollers that do not require high-speed processing. 2. **Remote Controls:** Used in infrared (IR) transmission circuits. 3. **Communication Equipment:** Often found in the IF (Intermediate Frequency) stages of radio receivers or pagers. 4. **Consumer Electronics:** Used in toys, household appliances, and simple timing circuits. --- ### 4. Circuit Implementation To use this part, it is typically connected across the `OSC_IN` and `OSC_OUT` pins of an integrated circuit. ```mermaid graph LR A[Pin 1: Input] --- B(Ceramic Resonator) B --- C[Pin 3: Output] D[Pin 2: Ground] --- B ``` *Note: Since capacitors are built-in, Pin 2 must be connected to the system ground.*