The **CDBKB455KCAX33-R0** is a specific type of electronic component known as a **Ceramic Discriminator**. It is primarily used in communication equipment for demodulating FM (Frequency Modulation) signals. --- ### 1. General Specifications This component is manufactured by **Murata Electronics** and belongs to the surface-mount device (SMD) category. | Parameter | Specification | | :--- | :--- | | **Component Type** | Ceramic Discriminator | | **Center Frequency (fo)** | 455 kHz | | **Mounting Type** | Surface Mount (SMD) | | **Application** | FM Demodulation / IC Interfacing | | **Packaging** | Tape & Reel (R0 suffix) | --- ### 2. Functional Description A ceramic discriminator is a resonant device that converts frequency variations into voltage variations. In a typical radio receiver circuit: 1. It works in conjunction with an **FM IF (Intermediate Frequency) IC**. 2. It provides the phase-shift required for the quadrature detection of FM signals. 3. The "455K" in the part number signifies its operation at the standard intermediate frequency of **455 kHz**. --- ### 3. Key Electronic Characteristics * **Resonant Impedance:** Engineered to match the requirements of specific FM detector ICs. * **Stability:** High frequency stability against temperature changes and aging. * **Size:** Compact SMD footprint, allowing for high-density circuit board layouts in portable devices like walkie-talkies or cordless phones. --- ### 4. Part Number Breakdown The nomenclature can be decoded as follows: * **CDB**: Ceramic Discriminator. * **KB**: Series designation (specific frequency/bandwidth characteristics). * **455K**: Nominal center frequency (455 kHz). * **CAX33**: Internal design code (refers to specific electrical tolerances and matching ICs). * **R0**: Packaging code (180mm Diameter Plastic Taping). ---