PEMI1QFN/HE,315

Overview

The PEMI1QFN/HE,315 is an EMI/RFI filter manufactured by NXP USA Inc., classified under LC and RC networks. It functions as a single-channel RC Pi filter designed for surface-mount applications. The component features a resistance value of 45 Ohms and a total capacitance of 8.5 pF. It is housed in a compact SOT-883 package, also identified as SC-101, suitable for space-constrained designs. This device provides effective suppression of electromagnetic interference through its specific passive network configuration.

Feature Summary

• Integrates a resistive-capacitive Pi-filter topology for signal line protection
• Provides combined EMI attenuation and electrostatic discharge (ESD) mitigation capabilities
• Utilizes a low-profile surface-mount SOT-883 package for board space efficiency

Applications

• High-speed data interface lines requiring noise suppression
• Portable electronic devices with limited PCB real estate
• Consumer electronics subject to strict EMI regulations

Procurement Notes

Verify the exact suffix HE against the manufacturer's current datasheet to confirm the 45 Ohm resistance specification. Ensure the SOT-883 footprint matches the design layout. Confirm RoHS compliance status if required by specific regional standards. Cross-reference the part number with official NXP documentation to avoid confusion with similar variants like PEMI1QFN/HR or PEMI1QFN/CR which have different electrical characteristics.

Selection Notes

Select this component when a dedicated EMI filter with integrated ESD protection is needed for single-ended signals. The 45 Ohm resistance and 8.5 pF capacitance define the cutoff frequency and impedance matching. Consider the SOT-883 package size relative to available board space. Evaluate the insertion loss requirements against the filter's performance at target frequencies. Ensure the operating voltage range aligns with the system's signal levels.

Part Context

This component belongs to NXP's PEMI1 series of EMI/RFI filters. These devices are engineered to protect sensitive circuits from high-frequency noise and transient events. The series offers various resistance values and package options to suit different application needs. The HE variant specifically denotes the 45 Ohm resistance configuration within the QFN form factor family.

Replacement Considerations

Direct substitutes include other PEMI1QFN variants from NXP such as PEMI1QFN/HR,315 or PEMI1QFN/CE,315, provided their specific resistance values match the circuit requirements. Verify that any alternative maintains the same SOT-883 footprint and pinout compatibility.