USB5906T/KD Equivalent & Substitute Parts

Part Overview

The USB5906T/KD is a USB Hub Controller manufactured by Microchip Technology, designed for USB 3.1 interface applications with I2C and SPI communication protocols. This component is packaged in a 100-VQFN (12x12) format with exposed pad and operates across a supply voltage range of 1.2V to 3.3V at temperatures from 0°C to 70°C.

The USB5906T/KD has reached obsolete product status. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for systems utilizing this hub controller architecture.

Substiute Parts

USB5906T/KD

Microchip TechnologyIn Stock: 912USB5906T/KD Datasheet

Current PartRFQ

USB5906CT/KD

Microchip TechnologyIn Stock: 5197USB5906CT/KD Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the USB5906T/KD is determined by the following critical parameters:

• Manufacturer & Base Product Number: Both parts must originate from Microchip Technology and share the USB5906 base product number to ensure design compatibility and functional equivalence.
• Package & Case: Identical 100-VFQFN Exposed Pad packaging with 100-VQFN (12x12) supplier device package ensures mechanical and thermal compatibility.
• Protocol & Function: Both parts must operate as USB Hub Controllers with USB protocol support.
• Standards Compliance: USB 3.1 support is mandatory; USB 2.0 support is permissible as an additional capability.
• Interface Support: I2C and SPI interfaces must be present; additional interfaces (SMBus, UART) do not disqualify substitution.
• Voltage Supply Range: Supply voltage ranges must be compatible with system requirements; the substitute may have a narrower or equivalent range.
• Operating Temperature: 0°C to 70°C operating range must be maintained.
• Regulatory Compliance: RoHS3 compliance and MSL rating must match or exceed the original part specifications.

Parameter Comparison

Engineering Selection Recommendations

The USB5906CT/KD is a direct functional equivalent to the USB5906T/KD and is qualified as a substitute part based on the following engineering criteria:

• Product Status Alignment: The USB5906CT/KD maintains active manufacturing status, ensuring long-term supply chain availability and support compared to the obsolete USB5906T/KD.
• Identical Core Specifications: Both parts share the same base product number, package format, operating temperature range, and regulatory compliance certifications (ROHS3, MSL 3).
• Enhanced Interface Capability: The USB5906CT/KD provides additional interface options (SMBus, UART) while maintaining full compatibility with the required I2C and SPI interfaces of the original design.
• Compatible Voltage Supply: The substitute part's supply voltage ranges (1.08V ~ 1.32V, 3V ~ 3.6V) encompass the original part's specifications (1.2V, 3.3V), ensuring electrical compatibility.
• Regulatory Compliance: Both parts maintain identical RoHS3 compliance and MSL ratings, meeting all environmental and handling requirements.

Selection of the USB5906CT/KD eliminates obsolescence risk while maintaining full design compatibility and electrical performance.

Frequently Asked Questions (FAQ)

Q: Can the USB5906CT/KD be used as a direct replacement for the USB5906T/KD in existing designs?

A: Yes. Both parts share identical functional specifications, package formats, and regulatory compliance. The USB5906CT/KD is manufactured by the same supplier (Microchip Technology) and operates within the same electrical and thermal parameters. No design modifications are required.

Q: What is the difference between the Tape & Reel (TR) and Cut Tape (CT) & Digi-Reel® packaging?

A: Tape & Reel (TR) and Cut Tape (CT) & Digi-Reel® are different distribution and handling formats. TR packaging is supplied on continuous tape reels, while CT packaging is supplied in cut tape segments. Both formats contain identical components; the choice depends on assembly line requirements and order quantities. Digi-Reel® is a proprietary packaging option that may offer additional handling benefits.

Q: Are the additional interfaces (SMBus, UART) on the USB5906CT/KD mandatory for operation?

A: No. The USB5906CT/KD includes SMBus and UART interfaces in addition to the required I2C and SPI interfaces present on the USB5906T/KD. Designs utilizing only I2C and SPI will function identically on both parts. The additional interfaces do not affect compatibility or require implementation.

Q: Does the USB5906CT/KD support both USB 2.0 and USB 3.1 standards?

A: Yes. The USB5906CT/KD supports both USB 2.0 and USB 3.1 standards, while the USB5906T/KD supports USB 3.1 only. This expanded standard support on the substitute part does not affect compatibility with designs requiring USB 3.1 operation.

Q: Are the voltage supply ranges of the USB5906CT/KD compatible with the original design?

A: Yes. The USB5906CT/KD operates at 1.08V ~ 1.32V and 3V ~ 3.6V, which encompasses the original part's 1.2V and 3.3V specifications. The substitute part will operate correctly within the voltage supply parameters of the original design.

Q: What is the Moisture Sensitivity Level (MSL) rating, and does it affect substitution?

A: Both parts carry an MSL rating of 3 (168 Hours), indicating identical moisture sensitivity and handling requirements. No additional precautions are necessary when substituting the USB5906CT/KD for the USB5906T/KD.