PE43501MLI-Z

Overview

The PE43501MLI-Z is a high-linearity, 5-bit RF Digital Step Attenuator (DSA) manufactured by pSemi. It operates within a frequency range of 9 kHz to 6 GHz and provides a total attenuation range of 7.75 dB in 0.25 dB steps. The device features a maximum insertion loss of 2.8 dB and supports a 50 Ω characteristic impedance. It utilizes a serial-addressable CMOS control interface and is housed in a 5x5 mm, 32-lead QFN package with a height of 0.85 mm. The component is designed for robust performance across temperatures from -40 °C to +85 °C.

Feature Summary

• HaRP-enhanced architecture ensures high linearity and stable attenuation accuracy over varying frequencies and temperatures.
• CMOS-compatible serial-addressable digital control interface simplifies system integration and programming.
• UltraCMOS process technology on sapphire substrate delivers low insertion loss and minimal power consumption.
• Integrated on-board regulator maintains consistent performance independent of supply voltage variations.

Applications

• Test and measurement equipment requiring precise signal level adjustment
• Point-to-point communication systems needing variable gain control
• Very Small Aperture Terminal (VSAT) applications
• Wireless infrastructure components demanding high linearity

Procurement Notes

Verify the specific ordering suffix to ensure the correct package variant and tape-and-reel configuration. Confirm RoHS compliance status and lead finish specifications against current manufacturer documentation. Ensure the procurement channel sources genuine pSemi products to guarantee performance reliability and technical support availability.

Selection Notes

Select this component when a compact 5-bit attenuator with fine 0.25 dB resolution is required up to 6 GHz. It is suitable for designs prioritizing low insertion loss and high linearity within a small QFN footprint. Consider the CMOS interface compatibility for microcontroller-based control schemes in space-constrained RF front-end modules.

Part Context

The PE43501 belongs to the Peregrine series of RF digital step attenuators, leveraging patented UltraCMOS silicon-on-insulator technology. This family emphasizes high performance in small form factors, targeting modern wireless communications where size, power efficiency, and signal integrity are critical design constraints.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult official pSemi resources for cross-reference data or updated product line information before considering alternative components.