PE43404MLI-Z

Overview

The PE43404MLI-Z is a 4-bit RF Digital Step Attenuator (DSA) manufactured by pSemi. It operates within a frequency range of 0 Hz to 2 GHz and features a characteristic impedance of 75 Ohms. The device provides a fixed attenuation value of 15 dB. It is housed in a 20-WFQFN exposed pad package, designed for surface-mount applications in wireless communication systems requiring precise signal level control.

Feature Summary

• Implements 4-bit digital step attenuation architecture for controlled signal reduction
• Engineered with 75 Ohm impedance matching for specific transmission line compatibility
• Operates across a wide frequency spectrum extending from DC to 2 GHz
• Utilizes UltraCMOS technology for low power consumption and high reliability

Applications

• RF signal conditioning in cable television distribution networks
• Attenuation stages in 75 Ohm impedance test and measurement equipment
• Signal level management in broadband access infrastructure
• Front-end module integration for RF path loss compensation

Procurement Notes

Verify the exact part number suffix against official pSemi documentation to confirm the RoHS-compliant variant. Ensure that the 75 Ohm impedance specification aligns with your system design requirements, as this differs from standard 50 Ohm components. Confirm the 20-WFQFN package dimensions match your PCB footprint constraints before finalizing procurement orders.

Selection Notes

Select this component when a fixed 15 dB attenuation is required at 75 Ohms within the 2 GHz bandwidth. It serves as an alternative to variable attenuators when static loss is sufficient. Consider the 20-lead QFN package size for space-constrained layouts. Validate thermal performance under continuous wave conditions if operating near maximum power limits.

Part Context

This device belongs to the pSemi family of RF integrated circuits built on UltraCMOS silicon-on-insulator technology. It complements other attenuators and switches in the portfolio, offering specialized impedance options. The PE43404MLI-Z targets niche applications requiring 75 Ohm interfaces, distinguishing it from the more common 50 Ohm variants found in general-purpose wireless systems.

Replacement Considerations

Direct substitutes must match the 15 dB attenuation, 75 Ohm impedance, and 20-WFQFN package. Verify pinout compatibility and thermal characteristics. Cross-reference with other pSemi 75 Ohm DSA models if available. Ensure any replacement maintains the same frequency response up to 2 GHz.