TUSB8040ARKMR USB Hub Controller Equivalent & Substitute Parts

Part Overview

The TUSB8040ARKMR is a USB 3.0 hub controller IC manufactured by Texas Instruments, housed in a 100-WQFN package with dual rows and exposed pad. This component functions as a USB interface hub controller supporting USB 3.0 protocol standards. The part carries a "Not For New Designs" product status, indicating it has been superseded in the manufacturer's product line. Identifying equivalent and substitute parts is necessary for legacy system support, design continuity, and procurement flexibility when the primary part becomes unavailable.

Substiute Parts

TUSB8040ARKMR

Texas InstrumentsIn Stock: 1503TUSB8040ARKMR Datasheet

Current PartRFQ

TUSB8041RGCR

Texas InstrumentsIn Stock: 47172TUSB8041RGCR Datasheet

MFR RecommendedRFQ

TUSB8040ARKMT

Texas InstrumentsIn Stock: 1147TUSB8040ARKMT Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the TUSB8040ARKMR are identified based on the following core parameters that determine functional and physical compatibility:

Primary Substitution Criteria:

• Manufacturer: Texas Instruments (same manufacturer ensures design consistency)
• Function: Hub Controller (identical functional role)
• Protocol: USB with USB 3.0 standards support
• Voltage Supply: 1.1V and 3.3V compatibility
• RoHS3 Compliance: Environmental and regulatory alignment
• MSL Rating: 3 (168 Hours) for moisture sensitivity

Packaging Considerations: Substitutes may differ in package configuration (100-WQFN versus 64-VQFN) and packaging format (Cut Tape versus Tape & Reel). These differences affect board layout and procurement logistics but do not impact electrical functionality when pin assignments and interface specifications align.

Identified Substitutes:

1. TUSB8041RGCR (MFR Recommended) – Different package size (64-VQFN) with extended interface capabilities
2. TUSB8040ARKMT (Parametric Equivalent) – Identical electrical specifications and package, different packaging format

Parameter Comparison

Engineering Selection Recommendations

TUSB8040ARKMT (Parametric Equivalent): This part is the direct parametric equivalent to TUSB8040ARKMR. It maintains identical electrical specifications, operating temperature range (-40°C ~ 85°C), package configuration (100-WQFN), and functional characteristics. The only difference is the packaging format (Tape & Reel versus Cut Tape & Digi-Reel). This substitute is appropriate for applications requiring the exact same electrical and thermal performance. Both parts share "Not For New Designs" status, indicating they are legacy components.

TUSB8041RGCR (MFR Recommended): This part is designated as the manufacturer-recommended substitute. It maintains USB 3.0 protocol compliance, identical voltage supply requirements (1.1V, 3.3V), and ROHS3 compliance. However, it differs in three key aspects: (1) reduced package size (64-VQFN versus 100-WQFN), (2) narrower operating temperature range (0°C ~ 70°C versus -40°C ~ 85°C), and (3) expanded interface capabilities (GPIO, I2C, SMBus in addition to USB). The TUSB8041RGCR carries "Active" product status, indicating ongoing manufacturer support. Selection of this part requires verification that the narrower temperature range and different pin configuration are compatible with the target application.

Frequently Asked Questions (FAQ)

Q: Can TUSB8040ARKMT be used as a direct replacement for TUSB8040ARKMR? A: Yes. TUSB8040ARKMT is a parametric equivalent with identical electrical specifications, operating temperature range, and package configuration. The difference is packaging format (Tape & Reel versus Cut Tape & Digi-Reel), which affects procurement and assembly logistics but not electrical performance.

Q: Is TUSB8041RGCR a direct pin-for-pin replacement? A: No. TUSB8041RGCR uses a different package (64-VQFN versus 100-WQFN), resulting in a different pin count and layout. Board redesign is required for this substitution. Additionally, the operating temperature range is narrower (0°C ~ 70°C), which may not be suitable for applications requiring -40°C operation.

Q: Why is TUSB8041RGCR marked as "MFR Recommended" if it has different specifications? A: TUSB8041RGCR is the manufacturer's recommended forward path for new designs because it carries "Active" product status, ensuring continued availability and support. However, it is not a direct replacement due to package and temperature differences. Selection depends on application requirements.

Q: What does "Not For New Designs" status mean? A: This designation indicates the part has been superseded by newer alternatives in the manufacturer's product line. While the part remains available, Texas Instruments recommends using active alternatives for new designs. Existing designs using these parts may continue to source them for legacy support.

Q: Are all three parts RoHS3 compliant? A: Yes. TUSB8040ARKMR, TUSB8041RGCR, and TUSB8040ARKMT are all ROHS3 compliant with MSL rating 3 (168 Hours), meeting environmental and regulatory requirements.

Q: What is the impact of the different operating temperature ranges? A: TUSB8040ARKMR and TUSB8040ARKMT support -40°C ~ 85°C, while TUSB8041RGCR supports only 0°C ~ 70°C. Applications requiring operation below 0°C or above 70°C must use TUSB8040ARKMR or TUSB8040ARKMT. This is a critical selection criterion for industrial or automotive environments.

Q: Can the additional interfaces (GPIO, I2C, SMBus) on TUSB8041RGCR be ignored if not needed? A: The additional interfaces on TUSB8041RGCR are integrated into the die and cannot be disabled. If the application does not require these interfaces, they simply remain unused. However, the different pin configuration and package size require board-level redesign regardless of interface utilization.