TUSB1044IRNQR Equivalent & Substitute Parts

Part Overview

The TUSB1044IRNQR is a USB-C ReDriver interface component manufactured by Texas Instruments, designed for 10Gbps multi-protocol linear applications. This single-channel ReDriver operates at 3V to 3.6V supply voltage and is housed in a 40-WQFN (6x4) surface mount package. The component is Active in product status and RoHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating.

Substitute parts are identified when equivalent electrical and mechanical parameters align with the main part's functional requirements, enabling direct replacement in compatible circuit designs.

Key Parameters

Parameter	TUSB1044IRNQR
Manufacturer	Texas Instruments
Type	ReDriver
Applications	USB
Data Rate (Max)	10Gbps
Signal Conditioning	Input Equalization
Voltage - Supply	3V ~ 3.6V
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package / Case	40-WFQFN Exposed Pad
RoHS Status	ROHS3 Compliant
MSL Rating	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts for the TUSB1044IRNQR are identified based on the following allowed electrical and mechanical parameters:

Supply voltage range: 3V ~ 3.6V
Surface mount packaging with exposed pad configuration
ReDriver or Buffer/ReDriver functional type
RoHS3 compliance and MSL 1 rating
Active product status

The substitute parts listed (MAX14950CTO+, MAX14954ETO+, MAX4950ACTX+) share the core supply voltage specification and compliance certifications. However, these parts differ in channel count, package dimensions, and application focus (PCIe vs. USB), which affects their direct substitutability in specific circuit implementations.

Parameter Comparison

Parameter	TUSB1044IRNQR	MAX14950CTO+	MAX14954ETO+	MAX4950ACTX+
Manufacturer	Texas Instruments	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated	Analog Devices Inc./Maxim Integrated
Type	ReDriver	Buffer, ReDriver	Buffer, ReDriver	Buffer, ReDriver
Applications	USB	PCIe	PCIe	PCIe
Number of Channels	1	4	4	2
Voltage - Supply	3V ~ 3.6V	3V ~ 3.6V	3V ~ 3.6V	3V ~ 3.6V
Operating Temperature	-40°C ~ 85°C	0°C ~ 70°C	-40°C ~ 85°C	0°C ~ 70°C
Signal Conditioning	Input Equalization	Input Equalization, Output De-Emphasis	Input Equalization, Output De-Emphasis	Input Equalization, Output De-Emphasis
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	40-WFQFN Exposed Pad	42-WFQFN Exposed Pad	42-WFQFN Exposed Pad	36-WFQFN Exposed Pad
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

All listed substitute parts maintain RoHS3 compliance and MSL 1 (Unlimited) moisture sensitivity ratings, meeting the same environmental and regulatory standards as the TUSB1044IRNQR.

MAX14954ETO+ aligns most closely with the TUSB1044IRNQR in operating temperature range (-40°C ~ 85°C), supporting extended temperature applications. This part is suitable for designs requiring identical thermal performance specifications.

MAX14950CTO+ and MAX4950ACTX+ operate within the 0°C ~ 70°C temperature range, which is narrower than the main part. These options are applicable only in designs where the reduced temperature range is acceptable.

All substitute parts are Active in product status with confirmed inventory availability, ensuring supply chain continuity.

Frequently Asked Questions (FAQ)

Q: Can MAX14950CTO+ directly replace TUSB1044IRNQR in all applications?

A: Direct replacement depends on application requirements. Both parts share the 3V ~ 3.6V supply voltage and RoHS3 compliance. However, MAX14950CTO+ operates at 0°C ~ 70°C versus TUSB1044IRNQR's -40°C ~ 85°C range. Additionally, MAX14950CTO+ is a 4-channel PCIe ReDriver, while TUSB1044IRNQR is a single-channel USB ReDriver. Substitution is valid only if the design does not require extended temperature operation and can accommodate the different channel architecture.

Q: What is the primary difference between TUSB1044IRNQR and the Maxim substitute parts?

A: The TUSB1044IRNQR is optimized for USB-C 10Gbps applications with single-channel configuration. The Maxim parts (MAX14950CTO+, MAX14954ETO+, MAX4950ACTX+) are PCIe-focused ReDrivers with multi-channel designs (2 or 4 channels). All share the 3V ~ 3.6V supply voltage specification and surface mount packaging with exposed pads.

Q: Is MAX14954ETO+ a suitable substitute for extended temperature range applications?

A: Yes. MAX14954ETO+ operates at -40°C ~ 85°C, matching the TUSB1044IRNQR's temperature range. Both parts are RoHS3 compliant with MSL 1 ratings. However, MAX14954ETO+ is a 4-channel PCIe ReDriver, so circuit design modifications may be required to accommodate the different channel count and application focus.

Q: What packaging considerations apply when selecting a substitute?

A: TUSB1044IRNQR uses a 40-WQFN (6x4) package. Substitute parts use different WFQFN packages: MAX14950CTO+ and MAX14954ETO+ use 42-TQFN (4.6x9), and MAX4950ACTX+ uses 36-TQFN (6x6). PCB layout modifications are required for any package change. Pin assignments and signal routing must be verified against each part's datasheet before implementation.

Q: Are all substitute parts in active production?

A: Yes. TUSB1044IRNQR, MAX14950CTO+, MAX14954ETO+, and MAX4950ACTX+ are all Active in product status with confirmed inventory availability, ensuring long-term supply chain support.

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