TUSB551RWBR - 5Gbps USB 3.0 Redriver | Texas Instruments
MPN： TUSB551RWBR ✗ 停產TUSB551RWBR 概覽
A USB redriver is a signal-conditioning IC placed between a USB transmitter and receiver. It detects low-amplitude or degraded high-speed data, regenerates the signal, applies equalization, and transmits a cleaner waveform to the next device. The TUSB551RWBR belongs to the interface IC hierarchy, where USB redrivers support the physical layer of USB 3.0 systems.
Key features include one-channel SuperSpeed signal conditioning, operation from a 1.8 V supply, support for data rates through 5 Gbps, equalization, low power consumption, and automatic LFPS de-emphasis. Automatic LFPS de-emphasis helps the device support low-power states used during USB link training and device initialization. The fourth-generation redriver architecture also emphasizes output-drive performance for loss-limited USB links.
The device can compensate for channel loss encountered in system interconnects. Equalization increases the voltage margin available to the receiving endpoint, while regenerated edges reduce the timing uncertainty associated with a degraded differential signal. As a single-channel device, it is intended for point-to-point SuperSpeed links rather than multi-lane hub or switch architectures.
Typical uses include USB 3.0 Type-C host and peripheral connections, docking systems, external storage, monitors, test equipment, and embedded USB controllers. It is also useful when a board-to-board or cable path causes the receiver to encounter attenuation, ringing, or an eye-margin problem. Placement close to the transmitter can be preferable when that endpoint already suffers from package or board losses.
The primary design trade-off is signal improvement versus added board area and power. Place the redriver where channel loss is concentrated, provide a continuous reference plane beneath the high-speed pair, and route the differential traces as a controlled-impedance structure. Verify the complete channel with compliance testing rather than relying only on eye-waveform appearance.
This product page combines the manufacturer’s device description with package, interface, temperature, sourcing, and replacement guidance. It also identifies the practical checks needed to distinguish a true same-package substitute from a device that merely supports USB 3.0 or offers similar data-rate capability.
直接替換替代品，適用於 TUSB551RWBR — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此產品無可直接替換的替代品。
申請替代品TUSB551RWBR 規格
| Product Type | Single-channel USB 3.0 SuperSpeed redriver |
| Channel Count | 1 channel |
| Maximum Data Rate | 5 Gbps |
| 供應電壓 | 1.8 V |
| USB Generation | USB 3.0 SuperSpeed |
| Equalization Support | Yes |
| LFPS De-Emphasis | Automatic |
| Architecture Generation | Fourth-generation USB 3.0 redriver |
| 工作溫度範圍 | -40 °C to +85 °C |
| 封裝 | 12-X2QFN (RWB) |
| Package Dimensions | 1.6 mm × 1.6 mm |
| 腳位數 | 12 pins |
| 安裝類型 | Surface mount |
| 生命週期狀態 | NRND; gradual market phase-out reported in the manufacturer support forum |
TUSB551RWBR 1.6 mm × 1.6 mm 腳位配置指南
TUSB551RWBR（1.6 mm × 1.6 mm 封裝）的腳位配置。 腳位編號、功能與連接圖定義於製造商資料手冊中。請參閱該手冊以取得確切的封裝尺寸與焊接指引。
無詳細腳位定義資料： TUSB551RWBR.
請參閱 資料表 以查看完整腳位配置。
典型應用
TUSB551RWBR 適用於 6 應用s: USB 3.0 Type-C Host Connections, USB 3.0 Docking Systems, External Storage and Portable Peripherals, USB 3.0 Test and Measurement Equipment, Board-to-Board USB Links, USB 3.0 Video and Display Peripherals.
USB 3.0 Type-C Host Connections
The TUSB551RWBR fits a point-to-point USB 3.0 SuperSpeed path where connector and board losses reduce receiver margin. Its single-channel architecture, 5 Gbps capability, equalization, and automatic LFPS de-emphasis help recover a cleaner differential signal between the host transmitter and peripheral receiver. Place the device near the loss source, provide a continuous reference plane, and route the differential pair with matched geometry. Validate the completed link with USB eye and compliance testing because redriver placement cannot compensate for an incorrectly terminated connector or discontinuous return path.
推薦
USB 3.0 Docking Systems
TUSB551RWBR can compensate for attenuation introduced by dock PCB routing, internal cables, and connector transitions in USB 3.0 docking stations. Equalization increases signal margin while the regenerated output reduces the timing and amplitude degradation caused by a lossy channel. Automatic LFPS de-emphasis supports low-power signaling during link initialization. Because the redriver handles one SuperSpeed channel, a multi-lane dock may require one device per lane. Confirm lane direction, transmitter and receiver placement, and AC coupling or impedance requirements from the USB architecture before laying out the board.
推薦
External Storage and Portable Peripherals
The TUSB551RWBR is useful in external storage, portable peripherals, and other USB 3.0 systems where cables and connector transitions contribute channel loss. Its 5 Gbps redriver capability regenerates the SuperSpeed differential signal, while equalization improves the amplitude available to the receiver. The 1.6 mm by 1.6 mm 12-X2QFN package supports compact boards, but careful escape routing and exposed-pad grounding are essential. Validate operation over cable length, connector, housing, and temperature conditions representative of the finished product rather than testing only the bare PCB.
推薦
USB 3.0 Test and Measurement Equipment
TUSB551RWBR can be used in USB 3.0 test fixtures, analyzers, and instrumentation when long PCB paths, cable assemblies, or repeated connector transitions weaken the SuperSpeed channel. Regeneration and equalization improve the condition of the signal presented to the device under test, and automatic LFPS de-emphasis supports link-training behavior. Place the redriver where signal degradation begins, not merely near the instrument connector, so the downstream test path receives the greatest practical margin. Perform eye, jitter, and compliance checks with the complete fixture to verify the improvement.
推薦
Board-to-Board USB Links
The TUSB551RWBR is appropriate for board-to-board USB 3.0 links where connector launches, long traces, or multiple switching stages reduce high-speed margin. Equalization and active regeneration can improve the received waveform without changing the host or peripheral controller. Keep the SuperSpeed pair continuous, maintain symmetric clearances, and place the redriver near the transmitter when loss begins there. If a receiver-side redriver is used instead, verify that the direction of signal flow and all control pins match the intended data path. Compliance testing should include both the powered state and low-power transitions.
推薦
USB 3.0 Video and Display Peripherals
TUSB551RWBR can support USB 3.0 video peripherals, display adapters, and other bandwidth-oriented accessories where the connection includes a long internal cable or dense connector path. Its single-channel 5 Gbps redriver restores signal amplitude and helps reduce the eye-closure effects of channel loss. The compact 12-X2QFN package fits space-constrained designs, although its differential escape routing requires a clean reference plane and symmetrical geometry. Evaluate the complete display accessory with its intended cable and host because the available link margin depends on the aggregate interconnect rather than the redriver alone.
推薦
推薦產品摘要
工程參考資料，適用於 TUSB551RWBR — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 |
|---|---|
| Package | 12-X2QFN (RWB), 1.6 mm × 1.6 mm |
| Brand | Texas Instruments |
| Product Type | Single-channel USB 3.0 SuperSpeed redriver |
| Channel Count | 1 channel |
| Maximum Data Rate | 5 Gbps |
| — | 1.8 V |
| Equalization | Supported |
| LFPS De-Emphasis | Automatic |
| Operating Temperature | -40 °C to +85 °C |
| Drop-In Compatibility | No confirmed same-package substitute established |
主要差異化特點
- Compact single-channel SuperSpeed redriver (對比TUSB1002A)
- Integrated automatic LFPS handling (對比TUSB522P)
- 5 Gbps SuperSpeed signal conditioning with equalization (對比TUSB2551PWR)
設計說明
Place the TUSB551RWBR close to the loss source and keep the SuperSpeed differential escape traces short, symmetrical, and continuously referenced. Follow the manufacturer land pattern for the 12-X2QFN RWB package and connect the exposed pad to the appropriate ground structure. Avoid vias, splits, and impedance discontinuities in the differential pair because they can add reflections that offset the redriver’s equalization benefit.
Use receiver eye measurements and channel-loss analysis to decide where the redriver belongs. Compare the link with and without TUSB551RWBR under the intended cable, connector, temperature, and power conditions. Equalization should improve the received differential amplitude and eye opening, but it cannot repair an incorrect connector launch, discontinuous return path, or a receiver already operating beyond its specified electrical limits.
Follow the Texas Instruments manufacturer datasheet for the 1.8 V supply network and decoupling implementation. Place the recommended bypass capacitor adjacent to the device supply pins, use a low-impedance ground connection for the exposed pad, and keep high-current return paths from disturbing the redriver reference. Verify the rail during USB low-power states and full-speed data activity because supply disturbances can affect link training and the measured signal margin.
合規資訊
Compliance attributes are not stated in the accessible product information. The listed operating-temperature range is -40 °C to +85 °C, but that range does not establish AEC-Q100 qualification. Use the manufacturer datasheet and current product compliance documentation for final sourcing and regulatory review.
