The **SFSKA5M50CF00-R3** is a specialized electronic component categorized as a **Ceramic Discriminator**, manufactured by Murata Electronics. It is primarily used in FM (Frequency Modulation) detection circuits to convert frequency variations into audio signals. --- ### 1. Technical Specifications The following table summarizes the key electrical characteristics of the component: | Parameter | Specification | | :--- | :--- | | **Center Frequency (fo)** | 5.5 MHz | | **Recovered Audio Voltage** | 240mV min. (at Δf=±50kHz) | | **Distortion Factor** | 1.0% max. | | **Operating Temperature** | -20°C to +80°C | | **Package Type** | Surface Mount (SMD) | | **Standard Application** | Television sound IF (Intermediate Frequency) | --- ### 2. Functional Description The SFSKA5M50CF00-R3 belongs to the **CERALOCK®** family of piezoelectric components. Its primary functions include: * **FM Demodulation:** It acts as the resonant element in a quadrature detection circuit. When paired with a compatible IC, it allows for the extraction of audio information from a 5.5 MHz carrier wave. * **Intermediate Frequency (IF) Processing:** The 5.5 MHz frequency is the standard "Sound IF" used in various analog television broadcast systems (specifically PAL B/G standards). * **Miniaturization:** Unlike traditional LC (Inductor-Capacitor) coils, this ceramic discriminator requires no manual adjustment and takes up significantly less PCB space. ### 3. Application Areas * **Television Receivers:** Used in the audio processing stage of analog TV sets. * **Video Equipment:** VCRs or tuners that process 5.5 MHz sound subcarriers. * **Communication Receivers:** Any narrowband FM system operating at the 5.5 MHz intermediate frequency. --- ### 4. Circuit Integration In a typical circuit, this part is connected to an FM IF IC (such as those from Sanyo, Toshiba, or NXP). Because it is a surface-mount device (SMD), it is suitable for automated high-speed assembly. It eliminates the need for "tuning" during the manufacturing process, which reduces labor costs and improves reliability compared to adjustable coils.