The **CDBKB455KCAY66-R0** is a specialized electronic component primarily categorized as a **Ceramic Discriminator**. It is manufactured by **Murata Electronics** and is commonly used in telecommunication circuits for frequency demodulation. --- ## 1. Technical Specifications Below are the primary technical parameters for this specific part: | Parameter | Specification | | :--- | :--- | | **Component Type** | Ceramic Discriminator | | **Center Frequency ($f_o$)** | 455 kHz | | **Frequency Tolerance** | ±1.5 kHz | | **Recovered Audio Voltage** | 80 mV min. (at 455 kHz) | | **Distortion Factor** | 2.0% max. | | **Operating Temperature** | -20°C to +80°C | | **Mounting Type** | Surface Mount (SMD) | | **Packaging** | Tape & Reel (indicated by -R0) | --- ## 2. Functional Description A ceramic discriminator like the **CDBKB455KCAY66-R0** is used to convert frequency variations into voltage variations. It is a critical component in the **FM (Frequency Modulation) Demodulation** stage of a radio receiver. ### Key Working Principles: * **Phase-Shift Detection:** It works in conjunction with an IC (Integrated Circuit) to create a phase-shifted signal. The IC compares the original signal with the shifted signal from the discriminator to extract audio data. * **Selectivity:** It is tuned specifically to the **455 kHz Intermediate Frequency (IF)**, which is the standard standard for AM and narrow-band FM communication systems. --- ## 3. Physical Attributes & Series The "CDBKB" series is known for its miniature size and surface-mount compatibility, making it ideal for modern compact electronics. * **Materials:** High-stability piezoelectric ceramics. * **Dimensions:** Typically utilizes a small footprint (approx. 4.5 x 2.0 mm) to save PCB real estate. * **Advantages:** * Adjustment-free (unlike LC coils). * High mechanical stability. * Resistance to vibration and shock. --- ## 4. Common Applications This part is typically found in: 1. **Two-way Radios:** Walkie-talkies and emergency communication devices. 2. **Cordless Phones:** Older generation wireless telephony. 3. **Paging Systems:** Receivers that require stable IF stages. 4. **FM Receivers:** Specifically in the narrowband FM circuitry. ---