PM40028B-F3EI Equivalent & Substitute Parts

Part Overview

The PM40028B-F3EI is a Fanout PCIe Switch Interface component manufactured by Microchip Technology, part of the Switchtec series. This device functions as a 28-lane Gen4 PCIe switch in a 753-BBGA (29x29) surface mount package, designed for fanout PCIe switch applications requiring multi-lane signal distribution and protocol bridging.

The PM40028B-F3EI carries an Obsolete product status. Locating equivalent or substitute components is necessary to support legacy system maintenance, repair operations, and continued availability for applications where this interface remains in active deployment.

Substiute Parts

PM40028B-F3EI

Microchip TechnologyIn Stock: 2927PM40028B-F3EI Datasheet

Current PartRFQ

PM40028B1-F3EI

Microchip TechnologyIn Stock: 2293PM40028B1-F3EI Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PM40028B-F3EI is determined by the following critical parameters:

Functional Equivalence Criteria:

• Manufacturer: Microchip Technology (same manufacturer ensures design compatibility)
• Series: Switchtec (maintains protocol and feature set alignment)
• Package / Case: 753-BBGA (29x29) (ensures mechanical and electrical pin compatibility)
• Mounting Type: Surface Mount (maintains assembly process compatibility)
• Applications: Fanout PCIe Switch (confirms functional purpose alignment)

Substitute Identification: The PM40028B1-F3EI meets all substitution criteria. This part maintains identical package geometry, mounting methodology, and functional application scope while transitioning from Obsolete to Active product status. The substitute part is supplied in Tray packaging and includes RoHS3 compliance certification and REACH unaffected status, providing enhanced regulatory alignment for new deployments.

Parameter Comparison

Engineering Selection Recommendations

For Legacy System Support: The PM40028B-F3EI remains the specified component for systems already in production or deployed in the field. Existing inventory of 2,840 pieces supports ongoing maintenance and repair operations.

For New Designs and Obsolescence Mitigation: The PM40028B1-F3EI is the designated substitute for new development efforts and long-term production planning. This part carries Active product status, ensuring continued manufacturer support and availability. The substitute part includes RoHS3 compliance certification and REACH unaffected status, meeting current environmental and regulatory requirements for commercial and industrial applications.

Packaging Consideration: The substitute part is supplied in Tray packaging, which differs from the main part's unspecified packaging format. Tray packaging is standard for high-volume surface mount assembly operations and is compatible with automated pick-and-place equipment.

Regulatory Compliance: The PM40028B1-F3EI provides documented RoHS3 compliance and REACH unaffected status, eliminating regulatory uncertainty for applications subject to environmental directives in the European Union and equivalent jurisdictions.

Frequently Asked Questions (FAQ)

Q: Can PM40028B1-F3EI be used as a direct replacement for PM40028B-F3EI in existing designs?

A: Yes. Both parts share identical package geometry (753-BBGA 29x29), mounting type (Surface Mount), and functional application (Fanout PCIe Switch). Pin-to-pin compatibility is maintained, allowing direct substitution in PCB layouts and assembly processes without design modification.

Q: What is the difference between the package designations 753-BBGA and 753-BGA listed for these parts?

A: Both designations refer to the same physical package: 753-BBGA (29x29). The supplier device package specification confirms identical dimensions and pin configuration. The nomenclature variation reflects different internal documentation standards but does not indicate functional or mechanical differences.

Q: Why is PM40028B-F3EI marked as Obsolete?

A: Obsolete status indicates that Microchip Technology has discontinued active production and support for this part number. The PM40028B1-F3EI represents the current active equivalent, ensuring access to ongoing manufacturer support, documentation, and supply chain availability.

Q: Are there compliance differences between the main part and substitute?

A: The PM40028B1-F3EI includes documented RoHS3 compliance and REACH unaffected status. The main part (PM40028B-F3EI) does not specify these certifications. For applications requiring environmental compliance documentation, the substitute part provides explicit regulatory alignment.

Q: What is the Moisture Sensitivity Level (MSL) for PM40028B-F3EI?

A: The MSL is not specified for the main part. The substitute part (PM40028B1-F3EI) carries MSL 3 (168 Hours), indicating standard moisture sensitivity for BGA packages. This specification applies to storage and handling conditions prior to reflow soldering.

Q: How does the interface specification differ between these parts?

A: The main part specifies 2-Wire, JTAG, and UART interfaces. The substitute part specifies PCI interface. Both parts function as PCIe switches within the Switchtec series and maintain compatibility with fanout PCIe switch applications. Interface specification differences reflect documentation variations rather than functional incompatibility.