4273-52

Overview

The pSemi 4273-52 is an SPDT broadband RF switch operating from 5 MHz to 3 GHz. It features a 75 Ohm impedance topology and utilizes UltraCMOS technology on a sapphire substrate. The device operates within a supply voltage range of 2.7 V to 3.3 V and supports surface mount installation in an SC-70-6 package. It functions across a temperature range of -40°C to +85°C, providing high isolation for CATV applications.

Feature Summary

• UltraCMOS technology on sapphire substrate
• Single line control interface
• 75 Ohm impedance design

Applications

• CATV signal routing
• Broadband RF switching
• Telecommunications equipment

Procurement Notes

Verify the current production status before procurement as this component may be discontinued. Confirm that the 75 Ohm impedance specification aligns with your system requirements, as many standard RF designs utilize 50 Ohm interfaces. Ensure the SC-70-6 package dimensions fit your PCB layout constraints. Cross-reference the datasheet for any specific ordering code variations or alternative part numbers if availability is restricted.

Selection Notes

Select this component when a 75 Ohm impedance match is required for CATV or broadband applications up to 3 GHz. The single-line control simplifies driver circuitry compared to multi-control switches. Consider the UltraCMOS process benefits for low power consumption and high isolation. Verify that the 2.7 V to 3.3 V supply range matches your system's available voltage rails.

Part Context

This part belongs to the UltraCMOS series by pSemi, leveraging silicon-on-insulator technology on a sapphire substrate. This family is designed for high-performance RF switching with low insertion loss and high isolation. The 4273-52 specifically targets 75 Ohm systems, distinguishing it from standard 50 Ohm variants in the portfolio.

Replacement Considerations

Check for PE4273-00, PE4273-51, or PE4273-52 as potential substitutes, noting that Peregrine Semiconductor has indicated discontinuation reviews for these listed codes. Verify functional compatibility regarding impedance and package type before substitution.