A USB Type-C redriver is useful when measured loss in a USB or DisplayPort high-speed channel is eroding signal margin—not as a universal requirement for every USB-C design. Two active examples are TI’s TUSB1044, for USB 3.1 Gen 2 and DisplayPort Alt Mode, and NXP’s PTN37011, which targets USB 3.2 and DisplayPort 2.0.
What a USB-C redriver does—and when you need one
A redriver conditions a high-speed signal to compensate for channel loss and reduce inter-symbol interference. It uses receive equalization and controlled output behavior to restore signal margin, while supporting the protocols and modes specified for the selected device. In a USB Type-C design, it may also sit alongside the routing needed for reversible connector orientation and USB or DisplayPort Alt Mode lanes.
TI describes its TUSB1044 as “a USB Type-C Alt Mode redriver switch supporting data rates up to 10Gbps.” Its product documentation specifies up to 11 dB of linear equalization at 4.05 GHz. Those are device capabilities, not a promise that any board, connector and cable combination will meet its desired margin.
Decide from the channel, not from the connector
Consider a redriver when channel analysis or measurement shows that board and cable loss is impairing the eye or reducing margin. Place it where it can address that loss, and confirm the placement against the chosen silicon vendor’s channel and compliance guidance. A redriver cannot compensate for every layout, cable or interoperability problem.
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Validate the entire path with the intended cable, connector, mux and power-delivery controller, across the required operating conditions. Vendor specifications describe the chip’s capabilities; they do not establish a universal cable-length guarantee or prove compliance for a particular implementation.
Which current USB-C redriver fits the design?
The TUSB1044 and PTN37011 are both listed as active, but they target different protocol generations. The table distinguishes published capabilities from features for which the cited product material does not state a value. “Not stated” means the cited material summarized here does not establish the detail; check the current datasheet before selecting a part.
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| Selection point | TI TUSB1044 | NXP PTN37011 |
|---|---|---|
| USB and DisplayPort support | USB Type-C USB 3.1 Gen 2 and DisplayPort 2.1 Alt Mode. Source: TI TUSB1044 product documentation, current page. | USB 3.2 and DisplayPort 2.0; supports USB Gen1/Gen2 and mixed USB/DP lane modes. Source: NXP PTN37011 product page, 2026. |
| Published maximum data rate | Up to 10 Gbps. Source: TI TUSB1044 product documentation, current page. | USB 3.2 Gen 2 is specified at 10 Gbit/s per lane in the product’s mode descriptions. This is a per-lane rate, not a stated aggregate maximum. Source: NXP PTN37011 product page, 2026. |
| Channels, orientation and lane routing | Four reversible channels; Type-C Alt Mode redriver switch. Source: TI TUSB1044 product documentation, current page. | Mixed USB/DP lane modes are stated; an exact channel count and orientation-handling details are not stated in the cited product summary. Source: NXP PTN37011 product page, 2026. |
| Equalization and output controls | Up to 11 dB linear equalization at 4.05 GHz. Source: TI TUSB1044 product documentation, current page. | Not stated in the cited product summary. Source: NXP PTN37011 product page, 2026. |
| Configuration and sideband | GPIO or I2C configuration for direction/equalization; hot-plug operation is supported. Source: TI TUSB1044 product documentation, current page. | Not stated in the cited product summary. Source: NXP PTN37011 product page, 2026. |
| USB4 or Thunderbolt support | Not stated in the cited TUSB1044 product documentation. Source: TI TUSB1044 product documentation, current page. | Not stated in the cited PTN37011 product summary. Source: NXP PTN37011 product page, 2026. |
| Supply voltage | 3.3 V. Source: TI TUSB1044 product documentation, current page. | Not stated in the cited product summary. Source: NXP PTN37011 product page, 2026. |
| Package and temperature grade | Not stated in the cited product summary. Source: TI TUSB1044 product documentation, current page. | Not stated in the cited product summary. Source: NXP PTN37011 product page, 2026. |
| Compliance evidence and board-level guarantee | No independent compliance-test result or universal cable-length guarantee is established by the cited product information. | No independent compliance-test result or universal cable-length guarantee is established by the cited product information. |
| Lifecycle | Active. Source: TI TUSB1044 product documentation, current page. | Active. Source: NXP PTN37011 product page, 2026. |
Choose for the required mode, not just the headline rate
Start with the USB generation, DisplayPort version and lane-sharing modes the system must support. TUSB1044’s documented combination is USB 3.1 Gen 2 with DisplayPort 2.1 Alt Mode. PTN37011 is described for USB 3.2 and DisplayPort 2.0, including mixed USB/DP lane modes. The cited information does not establish USB4 or Thunderbolt support for either part, so do not infer it from a USB or DisplayPort rate.
Also check the exact package, temperature grade, power states, mux behavior and sideband requirements in the full datasheet and design documentation. Do not treat a missing value in a product summary as equivalent to a confirmed capability.
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How a redriver differs from a retimer
A redriver applies analog signal conditioning, including equalization, to improve margin through a lossy channel. A retimer instead recovers and retransmits a timed signal, so the two approaches have different implementation and protocol requirements. Neither name alone guarantees a result: determine which device type the interface and channel need, then follow that part’s vendor guidance.
For component placement and AC coupling, NXP’s layout note discusses the “last redriver/retimer” in a channel. Its specific capacitor recommendations apply to the documented NXP combo-redriver designs; they are not universal values to copy into a different device family.
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USB-C redriver layout and AC-coupling guidance
Good signal integrity still depends on the full channel. Preserve differential-pair impedance, minimize stubs and maintain clean reference planes. Select placement, routing and coupling components from the chosen device’s datasheet and vendor layout guidance rather than copying a neighboring design.
NXP’s documented capacitor values
NXP application note AN13260 (2021) gives these AC-coupling capacitor values for its documented designs:
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- 0.1 µF between the chipset and the last redriver or retimer.
- 0.22 µF on TX and 0.33 µF on RX between the last redriver or retimer and the Type-C connector.
These values describe the arrangements in AN13260; they are not a substitute for checking the interface requirements and layout rules of the exact part being used.
Configuration, power and validation
For TUSB1044, allow for its 3.3 V supply and GPIO or I2C configuration of direction and equalization. Its documented hot-plug support does not remove the need to account for controller sequencing, power and sideband behavior in the schematic.
After layout, validate the complete signal path in the intended configuration. Include the actual connector, cable, mux and power-delivery controller, and test across the operating temperature required by the product. A vendor feature list is not a substitute for board-level validation.
Evaluation boards and lifecycle checks
TI offers TUSB1044AEVM and TUSB1044RNQEVM evaluation modules. TI’s TUSB1044AEVM material also describes a USB 3.2 x2, 20 Gbps evaluation context; that board-level figure should not be confused with the TUSB1044’s stated maximum supported data rate of 10 Gbps. DigiKey lists an assembled TUSB1044 evaluation board with a 10 Gbps maximum data rate. Check the vendor or distributor listing for the exact board revision and present availability.
Check lifecycle status before committing a new design. NXP marks PTN38003A as no longer manufactured. It is therefore a poor default for a new design unless there is a documented supply plan or redesign path.
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