PE43703MLI-Z RF Attenuator Equivalent & Substitute Parts

Part Overview

The PE43703MLI-Z is a fixed RF attenuator manufactured by pSemi, designed for RF signal conditioning applications requiring 31.75dB attenuation across the 9 kHz to 6 GHz frequency range. This component operates at 50 Ohms impedance in a 32-VFQFN Exposed Pad package. The part is currently listed as obsolete, necessitating identification of active equivalent alternatives that maintain functional and mechanical compatibility for ongoing production and maintenance applications.

Substiute Parts

PE43703MLI-Z

pSemiIn Stock: 8164PE43703MLI-Z Datasheet

Current PartRFQ

PE43704B-Z

pSemiIn Stock: 4559PE43704B-Z Datasheet

SimilarRFQ

PE43713B-Z

pSemiIn Stock: 3978PE43713B-Z Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PE43703MLI-Z is determined by the following critical parameters:

Package Compatibility: All substitute parts must use the 32-VFQFN Exposed Pad package to ensure PCB footprint and thermal management compatibility.

Impedance Matching: All candidates maintain 50 Ohms characteristic impedance, required for RF circuit integration without impedance transformation.

Attenuation Capability: Substitute parts must support the required 31.75dB attenuation level. Parts with variable or programmable attenuation ranges that include 31.75dB within their operating range satisfy this requirement.

Frequency Coverage: Substitute parts must cover the minimum frequency range of 9 kHz to 6 GHz. Extended frequency ranges are acceptable as they provide broader application flexibility.

Moisture Sensitivity: All candidates maintain MSL 1 (Unlimited) classification, ensuring equivalent moisture handling and storage requirements.

The identified substitute parts PE43704B-Z and PE43713B-Z meet all substitution criteria while offering the advantage of active product status and RoHS3 compliance.

Parameter Comparison

Engineering Selection Recommendations

PE43704B-Z is suitable for applications requiring extended frequency coverage to 8 GHz. This part provides variable attenuation capability (0dB ~ 31.75dB) with active product status, RoHS3 compliance, and REACH Unaffected certification. The extended frequency range accommodates future design flexibility beyond the original 6 GHz specification.

PE43713B-Z maintains the original 9 kHz to 6 GHz frequency specification while offering variable attenuation (0dB ~ 31.75dB) with active product status, RoHS3 compliance, and REACH Unaffected certification. This part provides the closest functional alignment to the PE43703MLI-Z within the specified frequency band.

Both substitute parts are available in Cut Tape (CT) and Digi-Reel® packaging formats, supporting both prototype and production volume requirements. Selection between PE43704B-Z and PE43713B-Z depends on whether extended 8 GHz frequency coverage is required for the application.

Frequently Asked Questions (FAQ)

Q: Can PE43704B-Z or PE43713B-Z be used as direct replacements for PE43703MLI-Z?

A: Yes. Both parts maintain identical package geometry (32-VFQFN Exposed Pad), impedance (50 Ohms), and moisture sensitivity classification (MSL 1). Both support the required 31.75dB attenuation level and cover the minimum 9 kHz to 6 GHz frequency range. PCB footprints are compatible without modification.

Q: What is the functional difference between the fixed 31.75dB PE43703MLI-Z and the variable 0dB ~ 31.75dB substitutes?

A: The PE43703MLI-Z provides fixed 31.75dB attenuation. The PE43704B-Z and PE43713B-Z offer programmable attenuation across a 0dB to 31.75dB range. Applications requiring only fixed 31.75dB attenuation can operate these parts at the fixed setting without utilizing the variable capability.

Q: How do the frequency ranges differ between PE43704B-Z and PE43713B-Z?

A: PE43704B-Z operates across 9 kHz to 8 GHz, providing 2 GHz additional upper frequency coverage. PE43713B-Z operates across 9 kHz to 6 GHz, matching the original PE43703MLI-Z specification. Selection depends on whether the application requires frequencies above 6 GHz.

Q: Are there compliance differences between the obsolete PE43703MLI-Z and the active substitutes?

A: Yes. PE43704B-Z and PE43713B-Z are both RoHS3 Compliant and REACH Unaffected, whereas the PE43703MLI-Z shows Vendor Undefined status for both certifications. The active substitutes provide documented regulatory compliance suitable for current manufacturing standards.

Q: What packaging options are available for the substitute parts?

A: Both PE43704B-Z and PE43713B-Z are available in Cut Tape (CT) and Digi-Reel® packaging formats, supporting both prototype quantities and production volume orders.