QPF4219SR

RF Front End (LNA + PA) Overview

The QPF4219SR is an integrated front-end module (FEM) designed for Wi-Fi 5 (802.11ac) systems operating in the 2.4 GHz band. It integrates a power amplifier, low-noise amplifier with bypass mode, SPDT switch, voltage regulator, and DC power detector. The device supports a supply voltage of 5 V and utilizes an LGA-24 package suitable for SMD/SMT installation. Key electrical parameters include a gain of 31 dB, a noise figure of 2 dB, and operation within the 2.402 GHz to 2.472 GHz frequency range.

RF Front End (LNA + PA) Feature Summary

• Integrates a 2.4 GHz power amplifier, low-noise amplifier with bypass mode, single-pole double-throw switch, voltage regulator, and DC power detector in a single compact component.

RF Front End (LNA + PA) Applications

• Access points
• Wireless routers
• Customer equipment
• Customer premises equipment
• Internet of Things devices

RF Front End (LNA + PA) Procurement Notes

The QPF4219SR is officially listed as an End-of-Life product by the manufacturer. Procurement verification must confirm current availability through authorized distributors or secondary markets. Designers should review the official discontinuance notification for timeline details and transition recommendations. Ensure that any sourced units are verified for authenticity and storage conditions due to moisture sensitivity classification.

RF Front End (LNA + PA) Selection Notes

Select this component for Wi-Fi 5 applications requiring a highly integrated solution to minimize board space and external matching components. The inclusion of a built-in voltage regulator and DC power detector simplifies system design. Consider the LGA-24 package constraints and moisture sensitivity requirements during layout and assembly planning. Verify compatibility with 2.4 GHz protocol standards before finalizing the selection.

RF Front End (LNA + PA) Part Context

The QPF4219SR belongs to the Qorvo QPF4219 series of integrated front-end modules. This series is specifically engineered for 2.4 GHz wireless connectivity solutions. The SR suffix typically denotes specific packaging or tape-and-reel configurations for surface-mount assembly. It represents a consolidated approach to RF front-end design, replacing discrete components with a unified module to enhance performance consistency.

RF Front End (LNA + PA) Replacement Considerations

As the QPF4219SR is discontinued, engineers must evaluate alternative integrated front-end modules from the same family or newer generations. Publicly confirmed substitutes within the Qorvo portfolio may include models such as the QPF4216 or QPF4230, depending on specific gain and integration requirements. Cross-reference pinouts and electrical specifications to ensure functional equivalence in the target application.