42551-52

Overview

The pSemi 42551-52 is a single-pole double-throw (SPDT) RF switch utilizing UltraCMOS technology. It operates within a frequency range of 9 kHz to 6 GHz with a nominal impedance of 50 Ohms. The device requires a supply voltage between 2.5 V and 3 V. Key electrical parameters include an insertion loss of 0.9 dB, an input third-order intercept point (IIP3) of 50 dBm, and an operating temperature range from -40°C to +85°C. It is housed in a 20-pin QFN package measuring 4x4 mm.

Feature Summary

• Single-pole double-throw configuration for signal routing
• Broadband operation covering DC to 6 GHz
• High linearity performance for signal integrity
• Low power consumption via UltraCMOS architecture

Applications

• Wireless infrastructure base stations
• Test and measurement equipment
• Mobile handset front-end modules
• Wi-Fi and Bluetooth transceivers

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm the specific suffix matches the required specifications. Check for obsolescence status as availability may vary. Ensure storage conditions comply with moisture sensitivity levels. Validate that the received part number corresponds exactly to the requested design requirements before integration.

Selection Notes

Select this component when broadband coverage up to 6 GHz is required. Consider the 50 Ohm impedance match for standard RF systems. Evaluate the IIP3 rating against system linearity needs. Verify the 20-QFN footprint compatibility with PCB layout constraints. Assess thermal management capabilities within the specified operating temperature range.

Part Context

This part belongs to the pSemi UltraCMOS family, known for integrating RF switches on CMOS processes. It complements other SPDT variants in the portfolio. The 42551 series offers high isolation and low insertion loss. It serves as a critical switching element in modern wireless communication architectures requiring reliable signal path control.

Replacement Considerations

Consult official substitution lists for verified alternatives. Cross-reference pinouts and electrical parameters carefully. Ensure package dimensions match existing board layouts. Verify functional equivalence in terms of frequency range and power handling. Review datasheets for any differences in control logic or supply requirements.