PE43503MLI

Overview

The PE43503MLI is a 6-bit RF Digital Step Attenuator (DSA) manufactured by pSemi. It provides a total attenuation range of 31.5 dB with a minimum step size of 0.5 dB. The device operates within a frequency range from 9 kHz to 55 GHz and maintains a characteristic impedance of 50 ohms. Key electrical specifications include a maximum insertion loss of 5.9 dB. The component is designed for high linearity and low power consumption, utilizing CMOS-compatible serial control interfaces.

Feature Summary

• High linearity performance enabled by HaRP-enhanced technology
• CMOS compatible serial-addressable control interface
• Maintains high attenuation accuracy over varying frequencies and temperatures
• Low insertion loss and low power consumption characteristics

Applications

• Wireless communication base stations
• Signal repeaters and relay systems
• RF signal conditioning in test equipment

Procurement Notes

Verify the specific ordering suffix when sourcing components. The PE43503MLI-Z designation indicates RoHS compliance, whereas the standard PE43503MLI may differ in environmental certification. Confirm package availability and ensure the supplier provides official datasheets matching the exact part number variant to avoid discrepancies in lead times or material composition.

Selection Notes

Select this component for applications requiring wideband attenuation up to 55 GHz. The 6-bit resolution offers fine control suitable for precision RF systems. Consider the 24-lead QFN exposed pad package for thermal management and compact board space. Ensure the system voltage aligns with the on-board regulator requirements to maintain stable performance without external voltage variations.

Part Context

This model belongs to the PE4350x series of digital step attenuators from pSemi. These devices are built using UltraCMOS technology, a silicon-on-insulator process on sapphire substrate. This family is characterized by high reliability and consistent performance across industrial temperature ranges, serving as a core component in modern RF front-end designs.

Replacement Considerations

Public documentation identifies PE43503MLI-Z and EK43503-01 as related variants within the same product family. Verify functional equivalence before substitution, as ordering codes may indicate differences in packaging, compliance status, or manufacturing revisions.