USB5742-I/2G Equivalent & Substitute Parts

Part Overview

The USB5742-I/2G is a USB Hub Controller manufactured by Microchip Technology, designed for USB 2-port hub applications with SPI interface capability. This component operates across supply voltages of 1.2V and 3.3V within a 56-VQFN (7x7) package footprint. The device is classified as obsolete, which necessitates identification of functionally compatible alternatives for ongoing design requirements and production continuity.

Substiute Parts

USB5742-I/2G

Microchip TechnologyIn Stock: 10510USB5742-I/2G Datasheet

Current PartRFQ

USB5742B-I/2G

Microchip TechnologyIn Stock: 1182USB5742B-I/2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the USB5742-I/2G is determined by the following critical parameters:

• Package compatibility: 56-VQFN (7x7) footprint with exposed pad
• Interface protocol: SPI support for host communication
• USB standards support: Minimum USB 2.0 capability
• Supply voltage ranges: Overlap with 1.2V and 3.3V nominal supplies
• Operating temperature range: -40°C to 85°C
• Hub controller function: 2-port USB hub architecture
• Compliance certifications: RoHS3 and REACH status

The USB5742B-I/2G qualifies as a direct substitute based on identical package geometry, maintained SPI interface, overlapping supply voltage specifications, and equivalent operating temperature range. The substitute part extends USB standards support to USB 3.2 and adds SMBus interface capability while maintaining backward compatibility with the original design requirements.

Parameter Comparison

Engineering Selection Recommendations

The USB5742B-I/2G is the manufacturer-recommended substitute for the obsolete USB5742-I/2G. Selection of this alternative is supported by:

• Identical mechanical footprint and pinout compatibility within the 56-VQFN (7x7) package
• Maintained SPI interface with additional SMBus support
• Active product status ensuring long-term availability and supply chain continuity
• Equivalent operating temperature specifications
• Compliance with REACH and RoHS3 standards
• Supply voltage specifications that encompass the original part's requirements

The substitute part introduces enhanced USB standards support (USB 3.2) and expanded interface options without requiring design modifications to existing PCB layouts or host firmware implementations dependent on SPI communication.

Frequently Asked Questions (FAQ)

Q: Can the USB5742B-I/2G be used as a direct replacement in existing designs?

A: Yes. The USB5742B-I/2G maintains identical package geometry (56-VQFN 7x7), pinout compatibility, and SPI interface support. No PCB layout modifications are required for mechanical or electrical substitution.

Q: What are the key differences between the original and substitute part?

A: The USB5742B-I/2G extends USB standards support from USB 3.1 to include USB 2.0 and USB 3.2, and adds SMBus interface capability alongside the existing SPI interface. Supply voltage specifications are provided as ranges (1.08V ~ 1.32V, 3V ~ 3.6V) rather than discrete values, offering broader operational flexibility.

Q: Are there any compliance or certification differences?

A: Both parts maintain REACH Unaffected status. The original part specifies ROHS3 compliance; the substitute part's RoHS status is not specified in available data. Both parts share identical Moisture Sensitivity Level (MSL) ratings of 3 (168 Hours).

Q: Why is the original part classified as obsolete?

A: Product obsolescence typically reflects manufacturer discontinuation decisions based on market demand, technology evolution, or product line consolidation. The USB5742B-I/2G represents the active successor within Microchip Technology's product portfolio.

Q: Are there inventory considerations for this substitution?

A: The USB5742B-I/2G is currently in active production with documented inventory availability, whereas the original part is obsolete and subject to limited remaining stock. New designs should specify the USB5742B-I/2G to ensure supply chain continuity.