The PKMCS1818E20A2R1 is a surface mount common mode choke from Murata Electronics North America. Common mode chokes are designed to suppress common mode noise in various electronic circuits. This particular model is designed for high-speed differential signal lines, such as those found in USB, HDMI, and Ethernet applications.

Applications

• USB Lines: Specifically designed for USB 2.0 and USB 3.0 data lines, reducing common mode noise.
• HDMI Lines: Can be used to filter common mode noise in HDMI connections.
• Ethernet: Employed in Ethernet interfaces to enhance signal integrity by suppressing common mode interference.
• LVDS (Low-Voltage Differential Signaling): Suitable for noise suppression in LVDS interfaces used in display panels and other high-speed data transmission systems.
• General Signal Lines: Can be used in any application where common mode noise needs to be reduced on differential signal lines.

Features

• Surface Mount Device (SMD): Designed for automated assembly processes.
• Compact Size: Small footprint allows for use in densely populated circuit boards.
• High Common Mode Impedance: Offers significant impedance to common mode noise, effectively suppressing it.
• Low Differential Mode Impedance: Minimizes impact on the desired differential signal, ensuring signal integrity.
• RoHS Compliant: Complies with Restriction of Hazardous Substances directive.

Benefits

• Improved Signal Integrity: Reduces common mode noise, leading to cleaner and more reliable signal transmission.
• Reduced EMI (Electromagnetic Interference): Minimizes radiation of noise from the circuit, helping to meet EMC standards.
• Enhanced System Performance: By suppressing noise, the choke contributes to improved overall system performance and reliability.
• Simplified Design: Allows for easier implementation of noise filtering in high-speed data lines.
• Cost-Effective Solution: Provides an efficient and cost-effective way to address common mode noise issues.

Additional Details

The PKMCS1818E20A2R1 has a specific impedance characteristic optimized for the frequency ranges typically used in USB and HDMI applications. It's crucial to refer to the Murata datasheet for detailed specifications, including impedance vs. frequency curves, DC resistance, rated current, and operating temperature range. The device is typically mounted using standard reflow soldering techniques. Careful attention to the layout is important for optimal performance, minimizing parasitic capacitance and inductance. It is designed to handle specific voltage and current levels; exceeding these may damage the component.