## Analysis of CFUKF455KA2X-R0 The **CFUKF455KA2X-R0** is a high-performance ceramic filter manufactured by Murata Electronics. It belongs to the **CFUKF** series, which are small, lightweight filters designed for use in the intermediate frequency (IF) stages of communication equipment. --- ### 1. Key Technical Specifications The following table outlines the primary electronic characteristics of this component: | Parameter | Specification | | :--- | :--- | | **Center Frequency (fo)** | 455.0 kHz | | **Bandwidth at 6dB (min)** | ±7.5 kHz | | **Bandwidth at 50dB (max)** | ±15.0 kHz | | **Insertion Loss (max)** | 6.0 dB | | **Stop Band Attenuation (min)** | 60 dB (within fo ±100kHz) | | **Input/Output Impedance** | 1500 $\Omega$ | | **Mounting Type** | Surface Mount (SMD) | --- ### 2. Functional Description Ceramic filters like the CFUKF455KA2X-R0 utilize the **piezoelectric effect** to convert electrical signals into mechanical vibrations and back into electrical signals. * **Selectivity:** Its primary role is to provide high selectivity in the 455 kHz IF stage, effectively filtering out noise and adjacent channel interference. * **Design:** It features a "GDT" (Group Delay Time) design characteristic, which helps minimize signal distortion, making it ideal for digital communication. * **Form Factor:** As an SMD component, it is designed for automated pick-and-place assembly, saving significant space on the PCB compared to traditional leaded filters. --- ### 3. Application Areas This part is commonly found in: * **Land Mobile Radios:** Handheld and vehicle-mounted two-way radios. * **Cordless Phones:** Standard communication devices. * **AM Receivers:** High-end AM radio processing. * **Digital Data Communication:** Equipment requiring precise signal filtering at the 455 kHz frequency. --- ### 4. Part Number Breakdown | Prefix | Series | Frequency | Design/Tolerance | Packaging | | :--- | :--- | :--- | :--- | :--- | | **CFU** | Ceramic Filter Unit | **455** (kHz) | **KA2X** (Bandwidth/Characteristics) | **R0** (Tape & Reel) | ---