PEMI1QFN/HR,315

Overview

The PEMI1QFN/HR,315 is a single-channel passive RC (Pi) EMI filter network manufactured by NXP USA Inc. It integrates a 45-ohm resistor and a 21-picofarad capacitor in a compact surface-mount package. The device provides second-order filtering for signal lines while incorporating electrostatic discharge (ESD) protection capabilities. Designed for high-frequency noise suppression, it operates within standard industrial temperature ranges and meets RoHS compliance standards.

Feature Summary

• Integrates a 45-ohm series resistor with parallel capacitors to form a Pi-filter topology
• Includes built-in ESD protection for safeguarding sensitive downstream components
• Utilizes a small-footprint SMD package suitable for space-constrained PCB layouts

Applications

• High-speed data line filtering in consumer electronics
• Signal conditioning for USB or similar interface ports
• EMI suppression on clock or control lines in automotive modules

Procurement Notes

Verify the specific suffix HR against the official NXP datasheet to confirm the 45-ohm/21-pF configuration. Ensure the ordering part number matches the required ESD rating and package variant. Cross-reference the manufacturer's latest documentation for any updates to pinout or electrical characteristics before finalizing procurement specifications.

Selection Notes

Select this component when a combined EMI filtering and ESD protection solution is required for single-ended signals. The fixed 45-ohm resistance and 21-pF capacitance values are optimized for specific impedance matching and cutoff frequency requirements. Evaluate the parasitic effects of the SMD package on high-speed signal integrity during the design phase.

Part Context

This component belongs to the PEMI1QFN family of integrated passive filter networks from NXP Semiconductors. These devices are designed to replace discrete R-C components and standalone ESD diodes, reducing board space and assembly complexity. The family offers various configurations with different resistance and capacitance values to suit diverse signal line applications.

Replacement Considerations

Direct substitutes include other variants within the PEMI1QFN family such as PEMI1QFN/LR,315 or PEMI1QFN/RM,315, provided their specific R-C values match the circuit requirements. Verify that alternative parts maintain equivalent ESD protection levels and package dimensions to ensure mechanical compatibility.