42551-51

Overview

The PE42551-51 is an SPDT RF switch IC from pSemi, designed for high-performance applications up to 6 GHz. It features a 50 Ohm characteristic impedance and is housed in a compact 20-QFN (4x4 mm) package with exposed pads. The device utilizes UltraCMOS technology to deliver low insertion loss and high isolation. It supports CMOS-compatible control logic and operates on a single 3.0 V power supply, making it suitable for space-constrained wireless systems requiring reliable signal routing.

Feature Summary

• Integrates CMOS control logic for direct interface with digital controllers
• Utilizes UltraCMOS silicon-on-insulator technology for enhanced linearity
• Provides high isolation performance across the operational frequency range

Applications

• Wireless local area network (WLAN) infrastructure
• Software-defined radio systems
• Test and measurement instrumentation

Procurement Notes

Verify the specific ordering suffix '-51' against the manufacturer's official datasheet to confirm package type and tape/reel specifications. Ensure compatibility with the target PCB footprint for the 20-QFN exposed pad configuration. Cross-reference the part number with authorized distributors to validate authenticity and current availability status before finalizing procurement orders.

Selection Notes

Select this component when a single-pole double-throw configuration is required for frequencies up to 6 GHz. Consider its UltraCMOS process for superior linearity compared to standard CMOS switches. Evaluate the 20-QFN package dimensions against board space constraints. Verify that the system control voltage aligns with the device's CMOS-compatible input requirements.

Part Context

The PE42551-51 belongs to pSemi's portfolio of UltraCMOS RF switches, which leverage patented silicon-on-insulator technology. This family targets high-frequency applications demanding low loss and high isolation. The -51 suffix typically denotes specific packaging or testing variations within the product line, distinguishing it from other pin-compatible or functionally similar variants.

Replacement Considerations

Consult official cross-reference guides for verified substitutes. Ensure replacement parts match the SPDT topology, 6 GHz maximum frequency, and 20-QFN package outline. Verify equivalent electrical parameters such as insertion loss and isolation levels to maintain system performance integrity.