USB5742/2G Equivalent & Substitute Parts

Part Overview

The USB5742/2G is a USB Hub Controller manufactured by Microchip Technology, designed for USB 2-port hub applications with a 56-VQFN package. This component integrates SPI interface capability and operates across dual voltage supplies (1.2V and 3.3V). The part is currently classified as obsolete, which necessitates identification of functionally compatible alternatives for ongoing design support and procurement planning.

Substiute Parts

USB5742/2G

Microchip TechnologyIn Stock: 33486USB5742/2G Datasheet

Current PartRFQ

USB5742B/2G

Microchip TechnologyIn Stock: 1255USB5742B/2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the USB5742/2G is determined by the following critical parameters:

Package Compatibility: Both the main part and substitute must use the 56-VQFN (7x7) Exposed Pad package to ensure PCB footprint compatibility without redesign.

Functional Equivalence: The substitute must perform USB hub controller functionality with support for multiple USB ports and maintain SPI interface capability for host communication.

Voltage Supply Ranges: The substitute must operate within overlapping or compatible voltage supply specifications. The USB5742/2G requires 1.2V and 3.3V supplies; compatible substitutes must support these voltage levels or provide equivalent dual-supply operation.

Operating Temperature Range: The substitute must maintain the 0°C ~ 70°C operating temperature specification to ensure thermal compatibility in the target application.

Compliance Standards: Both parts must maintain ROHS3 compliance and equivalent moisture sensitivity ratings to ensure regulatory and manufacturing process compatibility.

The USB5742B/2G meets all substitution criteria through identical package geometry, equivalent hub controller functionality, overlapping voltage supply specifications, matching temperature range, and equivalent compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

The USB5742B/2G is the direct substitute for the obsolete USB5742/2G. Selection of this alternative is supported by the following engineering factors:

Product Status Transition: The USB5742B/2G maintains active product status with current manufacturing and supply chain support, eliminating obsolescence risk associated with the USB5742/2G.

Regulatory Compliance: Both parts maintain ROHS3 compliance and identical MSL ratings, ensuring no additional qualification or manufacturing process changes are required.

Package Continuity: Identical 56-VQFN (7x7) Exposed Pad packaging eliminates PCB redesign requirements and maintains mechanical compatibility with existing designs.

Voltage Supply Compatibility: The USB5742B/2G voltage supply ranges (1.08V ~ 1.32V and 3V ~ 3.6V) encompass the USB5742/2G specifications (1.2V and 3.3V), ensuring direct electrical compatibility without power supply modifications.

Interface Enhancement: The USB5742B/2G adds SMBus interface capability while retaining SPI support, providing expanded host communication options without compromising existing SPI-based implementations.

Frequently Asked Questions (FAQ)

Q: Can the USB5742B/2G be used as a direct replacement for the USB5742/2G without PCB modifications?

A: Yes. Both parts use identical 56-VQFN (7x7) Exposed Pad packaging, ensuring footprint compatibility. The voltage supply ranges of the USB5742B/2G encompass the USB5742/2G specifications, allowing direct substitution without PCB redesign.

Q: What are the key differences between USB5742/2G and USB5742B/2G?

A: The USB5742B/2G is the active successor with expanded USB standards support (USB 2.0 and USB 3.2 versus USB 3.1), additional SMBus interface capability, and refined voltage supply ranges. Both maintain identical package geometry and operating temperature specifications.

Q: Are there any compliance or certification differences between these parts?

A: No. Both parts maintain ROHS3 compliance, identical MSL ratings (3, 168 Hours), and equivalent regulatory certifications. No additional qualification is required when transitioning from USB5742/2G to USB5742B/2G.

Q: Does the USB5742B/2G require firmware or software changes?

A: Firmware compatibility depends on the specific application implementation. The USB5742B/2G retains full SPI interface support, ensuring compatibility with existing SPI-based host communication protocols. The addition of SMBus capability is optional and does not affect SPI operation.

Q: What is the moisture sensitivity level, and how does it affect handling?

A: Both parts carry MSL rating 3 (168 Hours), indicating the component can be exposed to moisture for up to 168 hours at 85°C/85% relative humidity before soldering. Standard moisture control procedures during storage and assembly apply to both parts equally.