The part number **SFSKA6M00CF00-R3** refers to a **Ceramic Filter** manufactured by **Murata Electronics**. Specifically, it belongs to the SFECV/SFSKA series, which are small, high-performance filters used primarily in communication equipment. ### 1. General Specifications This component is an intermediate frequency (IF) filter designed to extract specific frequencies while suppressing noise in radio and television signals. | Feature | Specification | | :--- | :--- | | **Manufacturer** | Murata Electronics | | **Center Frequency (fc)** | 6.000 MHz | | **Type** | Ceramic Filter (Surface Mount Device - SMD) | | **Series** | SFSKA | | **Application** | Sound/Audio IF stages in TV/VCR systems | --- ### 2. Technical Characteristics The "6M00" in the part number indicates its tuned frequency of **6.0 MHz**. In the context of global broadcasting, this frequency is standard for the audio subcarrier in specific television systems (e.g., PAL I). * **Bandwidth:** Designed to provide a specific 3dB bandwidth to allow the audio signal to pass while rejecting adjacent channel interference. * **Insertion Loss:** Engineered to have low loss to maintain signal strength. * **Package Type:** Usually a small, 3-terminal surface mount package (SMD) to save PCB space. * **Impedance:** Typically matched to 330Ω or 470Ω depending on the specific circuit integration. --- ### 3. Application Use Cases These filters are critical in the "Superheterodyne" receiver architecture. 1. **Television Receivers:** Used to filter the FM audio signal from the composite video signal. 2. **FM Demodulation:** Ensures that only the 6.0 MHz subcarrier reaches the audio detector. 3. **Communication Buffers:** Acts as a band-pass filter in low-frequency communication devices. --- ### 4. Part Number Breakdown (Partial) | Segment | Meaning | | :--- | :--- | | **SF** | Surface Filter (Ceramic) | | **SK** | Product Category (Sound Filter) | | **6M00** | Center Frequency (6.000 MHz) | | **R3** | Packaging Code (usually refers to 180mm/7-inch Reel) | ---