PE43503MLI RF Attenuator Equivalent & Substitute Parts

Part Overview

The PE43503MLI is an RF attenuator manufactured by pSemi, designed for applications requiring variable attenuation across a wide frequency range. This component operates from 9 kHz to 6 GHz with attenuation control from 0 dB to 31 dB and maintains 50 Ohm impedance throughout its operating range. The part is currently classified as Obsolete, making identification of compatible substitute components essential for ongoing system support and new design implementations.

Substiute Parts

PE43503MLI

pSemiIn Stock: 50458PE43503MLI Datasheet

Current PartRFQ

PE43711B-Z

pSemiIn Stock: 17595PE43711B-Z Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PE43503MLI is determined by the following critical parameters:

• Attenuation Range: Substitute must support 0 dB to 31 dB minimum
• Frequency Range: Substitute must cover 9 kHz to 6 GHz minimum
• Impedance: Substitute must maintain 50 Ohm characteristic impedance
• Package Type: Substitute must use 24-VFQFN Exposed Pad package
• Series Compatibility: Substitute should belong to pSemi UltraCMOS® family

The PE43711B-Z meets all substitution criteria. It operates within the same frequency band, maintains identical impedance characteristics, uses the same package configuration, and belongs to the same UltraCMOS® product family. The PE43711B-Z provides an extended attenuation range of 0 dB to 31.75 dB, which encompasses the PE43503MLI specification and ensures full functional compatibility.

Parameter Comparison

Engineering Selection Recommendations

The PE43711B-Z is the qualified substitute for the obsolete PE43503MLI based on the following factors:

Product Status: The PE43711B-Z maintains Active product status with ongoing manufacturer support, ensuring long-term availability and supply chain continuity compared to the Obsolete PE43503MLI.

Regulatory Compliance: The PE43711B-Z carries ROHS3 Compliance certification, meeting current environmental and material restriction requirements for electronic components in regulated markets.

Functional Equivalence: Both components share identical electrical specifications across frequency range, impedance, package configuration, and moisture sensitivity classification. The PE43711B-Z provides extended attenuation capability (31.75 dB maximum versus 31 dB), which represents a functional superset of the original part.

Supply Availability: Current inventory of PE43711B-Z (17,500 units) provides immediate procurement options for replacement and new applications.

Frequently Asked Questions (FAQ)

Q: Can PE43711B-Z be used as a direct replacement for PE43503MLI in existing designs?

A: Yes. Both components use identical 24-VFQFN Exposed Pad packaging, operate across the same 9 kHz to 6 GHz frequency range, and maintain 50 Ohm impedance. Pin-to-pin compatibility and electrical performance are equivalent within the specified attenuation range of 0 dB to 31 dB.

Q: What is the significance of the extended attenuation range in PE43711B-Z?

A: The PE43711B-Z supports attenuation up to 31.75 dB compared to 31 dB in the PE43503MLI. This extended range provides additional design flexibility and does not create incompatibility; it represents enhanced capability within the same functional category.

Q: Are there packaging or handling differences between these components?

A: No. Both components are classified as MSL 1 (Unlimited moisture sensitivity level), indicating identical moisture handling and storage requirements. Both use the same 24-VFQFN Exposed Pad package format.

Q: Why is PE43503MLI marked as Obsolete?

A: Product obsolescence typically reflects manufacturer discontinuation decisions. The PE43711B-Z represents the active continuation within the pSemi UltraCMOS® RF attenuator product line, offering equivalent or enhanced functionality for ongoing applications.

Q: What compliance certifications apply to the substitute part?

A: The PE43711B-Z carries ROHS3 Compliance and REACH Unaffected status. Both components share the same ECCN (EAR99) and HTSUS (8542.39.0001) classifications for export and tariff purposes.