USB5906/KD Equivalent & Substitute Parts

Part Overview

The USB5906/KD is a USB Hub Controller IC manufactured by Microchip Technology, designed for USB 3.1 interface applications with I2C and SPI communication protocols. This component operates in the 100-VQFN (12x12) package format and supports dual supply voltages of 1.2V and 3.3V. The product is currently classified as obsolete, which necessitates identification of functionally compatible alternatives for ongoing design requirements and production continuity.

Substiute Parts

USB5906/KD

Microchip TechnologyIn Stock: 874USB5906/KD Datasheet

Current PartRFQ

USB5906C/KD

Microchip TechnologyIn Stock: 4093USB5906C/KD Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the USB5906/KD is determined by the following critical parameters:

• Package Compatibility: Identical 100-VQFN (12x12) Exposed Pad format ensures PCB footprint and assembly process compatibility
• Functional Equivalence: Hub Controller function with USB protocol support
• Interface Protocol Support: I2C and SPI interfaces must be present; additional interfaces do not disqualify a substitute
• USB Standards Support: USB 3.1 support is required; backward compatibility with USB 2.0 is acceptable
• Supply Voltage Range: Operating voltage specifications must encompass or align with the original 1.2V and 3.3V requirements
• Operating Temperature: 0°C to 70°C range must be supported
• Compliance Standards: RoHS3 compliance and MSL 3 rating required for manufacturing and storage compatibility

The USB5906C/KD meets all substitution criteria as a direct equivalent from the same manufacturer with enhanced interface capabilities and active product status.

Parameter Comparison

Engineering Selection Recommendations

The USB5906C/KD is the qualified substitute for the obsolete USB5906/KD. Both components share identical package geometry, thermal characteristics, and compliance certifications. The USB5906C/KD maintains full backward compatibility with the original design while offering extended interface capabilities (SMBus and UART support) and refined supply voltage specifications (1.08V–1.32V and 3V–3.6V ranges).

The substitute part's active product status ensures long-term availability and manufacturing support, eliminating supply chain risk associated with the obsolete original part. Voltage specification ranges in the USB5906C/KD encompass the original 1.2V and 3.3V operating points, confirming electrical compatibility in existing circuit designs.

Frequently Asked Questions (FAQ)

Q: Can the USB5906C/KD be used as a direct replacement for the USB5906/KD in existing designs?

A: Yes. Both parts share identical package dimensions (100-VQFN 12x12), operating temperature range (0°C–70°C), and compliance certifications (ROHS3, MSL 3). The USB5906C/KD supply voltage ranges (1.08V–1.32V, 3V–3.6V) encompass the original part's 1.2V and 3.3V specifications, ensuring electrical compatibility without circuit modification.

Q: What are the key differences between USB5906/KD and USB5906C/KD?

A: The primary differences are product status and interface capabilities. The USB5906/KD is obsolete; the USB5906C/KD is active. The USB5906C/KD adds SMBus and UART interface support beyond the original I2C and SPI interfaces. Both support USB 3.1; the USB5906C/KD adds USB 2.0 backward compatibility.

Q: Are there any packaging or storage considerations when switching to the USB5906C/KD?

A: No. Both parts carry identical MSL 3 (168 Hours) moisture sensitivity ratings and RoHS3 compliance. Storage and handling procedures remain unchanged. Verify tray packaging compatibility with your assembly process if the original part was supplied in alternative packaging.

Q: Does the USB5906C/KD support the same communication protocols as the original part?

A: Yes. The USB5906C/KD includes all protocols supported by the USB5906/KD (I2C and SPI) plus additional protocols (SMBus and UART). Existing firmware and protocol implementations require no modification.

Q: What is the inventory status of the USB5906C/KD?

A: The USB5906C/KD is actively manufactured and stocked with 4001 units available as new original inventory, providing reliable supply continuity compared to the obsolete USB5906/KD.