TUSB542RWQR - 5Gbps USB Type-C 2:1 MUX | Texas Instruments
部品番号: TUSB542RWQR ✓ 生産中TUSB542RWQR 概要
A USB Type-C redriver is an interface IC that restores signal integrity after interconnect losses while a 2:1 USB multiplexer routes one SuperSpeed lane pair between two destinations. The TUSB542 belongs to the USB interface controller hierarchy, where signal conditioning, lane routing, connection detection, and low-power management support reliable USB 3.1 Gen-1 communication between a host or device and external peripherals.
The device provides equalization settings up to 9 dB and output-swing control up to 6 dB, allowing engineers to compensate for PCB traces, connectors, and cable losses. Its integrated RX-detect function supports USB Type-C connection management, while signal monitoring enables the host to observe link or connection activity for broader power-management decisions. The dual-channel architecture follows the differential transmit and receive lanes of a USB SuperSpeed interface.
Power consumption is tailored to USB port states. The active current is listed as 100 mA, the U2/U3 low-power state consumes 1.3 mA, and the no-connection state consumes 300 µA. These operating-state figures make the device suitable for systems that spend substantial time idle, including docking stations, notebooks, tablets, docking accessories, and external storage systems.
Typical uses include USB Type-C docking and undocking systems, DisplayPort or Thunderbolt alternate-mode routing designs, external storage peripherals, test equipment, and compact computers where connector or PCB losses can impair 5 Gbps signaling. The 2:1 topology also allows one physical SuperSpeed interface to select between two downstream paths without changing the device’s core redriver function.
Layout is critical because a redriver cannot recover signal integrity that was damaged before the input reaches its pins. Keep the USB differential traces short and matched, provide a continuous reference plane, minimize stubs, and follow the manufacturer’s reference layout and component-placement guidance. Confirm the selected equalization and swing settings against the complete channel response rather than relying only on trace length.
This product analysis combines the manufacturer’s functional specifications with practical guidance for routing, equalization, power management, and drop-in replacement assessment. It highlights where the TUSB542RWQR is a direct fit, which functions require careful validation, and what an engineer should verify before introducing a substitute into an existing USB Type-C design.
ドロップイン代替品: TUSB542RWQR — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
この製品に利用可能なドロップイン代替品はありません。
代替品をリクエストTUSB542RWQR 仕様
| Product Type | USB Type-C SuperSpeed redriver and 2:1 multiplexer |
| USB Standard | USB 3.1 Gen-1 |
| Maximum Data Rate | 5 Gbps |
| Channel Count | 2 channels |
| Multiplexer Configuration | 2:1 |
| インターフェース | USB Type-C |
| 動作電源電圧 | 1.8 V |
| Active Current | 100 mA |
| U2/U3 Current | 1.3 mA |
| No-Connection Current | 300 µA |
| Selectable Equalization | Up to 9 dB |
| Output Swing Adjustment | Up to 6 dB |
| De-emphasis | Supported |
| Integrated Termination | RX-detect termination supported |
| Signal Monitoring | Supported for power management |
| 動作温度範囲 | -40 °C to +85 °C |
| パッケージ | 18-pin X2QFN (RWQ), 2.4 mm × 2.0 mm |
| 実装タイプ | Surface mount |
TUSB542RWQR 18-pin x2qfn (rwq), 2.4 mm × 2.0 mm ピン配置ガイド
TUSB542RWQR (18-pin x2qfn (rwq), 2.4 mm × 2.0 mm パッケージ) のピン配置。 ピン番号、機能、接続図はメーカーのデータシートで定義されています。正確なフットプリントとはんだ付けのガイドラインについては、データシートを参照してください。
詳細なピン配置データはありません: TUSB542RWQR.
詳細は データシート をご参照ください。
主な用途
TUSB542RWQR の用途: 6 件s: USB Type-C Docking Station, External Storage Peripherals, Compact Computer USB Routing, USB Type-C Peripheral Multiplexing, USB Signal Integrity Test Equipment, USB-C Dock and Adapter.
USB Type-C Docking Station
The TUSB542RWQR fits a docking station that routes one USB 3.1 Gen-1 SuperSpeed connection between two downstream paths. Its 2:1 multiplexer architecture combines routing with redriver functionality, while equalization up to 9 dB and output-swing adjustment up to 6 dB help compensate for losses through dock PCB traces and connectors. The 5 Gbps ceiling matches USB 3.1 Gen-1 rather than newer 10 Gbps links. Validate the complete host-to-device channel with every intended cable and peripheral before finalizing equalization and swing settings.
おすすめ
External Storage Peripherals
External storage products can place the TUSB542RWQR between a USB Type-C host connection and an internal USB SuperSpeed path. Redriver operation addresses attenuation and reflections introduced by longer PCB routes or connector transitions, while the 2:1 function allows routing toward two storage-facing paths. The device supports equalization up to 9 dB and swing adjustment up to 6 dB for channel tuning. Its 300 µA no-connection current is particularly useful in portable storage products that spend time disconnected.
おすすめ
Compact Computer USB Routing
A compact notebook or tablet can use the TUSB542RWQR to route USB 3.1 Gen-1 traffic around dense board areas or between internal and external USB Type-C paths. The 18-pin X2QFN (RWQ) package supports space-constrained layouts, and the integrated redriver can improve margin where connector and trace losses threaten signal integrity. Low-power figures of 1.3 mA in U2/U3 and 300 µA with no connection support energy-conscious designs. Confirm that the system’s source and sink devices are limited to 5 Gbps.
おすすめ
USB Type-C Peripheral Multiplexing
The TUSB542RWQR is appropriate for peripheral designs that need one USB Type-C SuperSpeed source to select between two internal destinations. Its integrated 2:1 routing avoids placing a separate mux beside the redriver, while adjustable equalization, de-emphasis, and output-swing control provide channel optimization tools. RX-detect termination and signal monitoring support connection-aware behavior and system power management. The design must ensure that both destinations tolerate the selected operating mode and that control signals are sequenced correctly.
おすすめ
USB Signal Integrity Test Equipment
USB signal-integrity test equipment can use the TUSB542RWQR as a controllable channel-conditioning element between a source and a measurement or compliance fixture. Equalization up to 9 dB and output swing up to 6 dB permit repeatable comparison of receiver margins under different channel conditions. The 2:1 routing function can streamline fixtures that evaluate two cable or board configurations. Use controlled instrumentation for eye-diagram and compliance measurements, and account for fixture loss separately from the channel being evaluated.
おすすめ
USB-C Dock and Adapter
A USB-C dock or adapter benefits from the TUSB542RWQR when internal routing loss or connector transitions threaten 5 Gbps performance. The device combines a two-channel redriver with 2:1 SuperSpeed selection, reducing the need for separate signal-conditioning and routing blocks. Adjustable equalization and swing provide flexibility across different cable and dock architectures, while the three published operating currents support active, low-power, and disconnected states. Verify that the adapter’s advertised USB speed matches the device’s 5 Gbps capability.
おすすめ
エンジニアリング参考データ: TUSB542RWQR — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 |
|---|---|
| Brand | Texas Instruments |
| Package | 18-pin X2QFN (RWQ), 2.4 mm × 2.0 mm |
| Product Type | USB Type-C SuperSpeed redriver and 2:1 multiplexer |
| Maximum Data Rate | 5 Gbps |
| USB Standard | USB 3.1 Gen-1 |
| Channel Count | 2 channels |
| Multiplexer Ratio | 2:1 |
| Equalization | Selectable up to 9 dB |
| Output Swing | Adjustable up to 6 dB |
| Active Current | 100 mA |
主な差別化要因
- Combines 5 Gbps redriver and 2:1 routing （vs TUSB544IRNQR)
- Adjustable channel compensation （vs PI3USB9201)
- Low-power disconnected-state consumption （vs HD3SS3220)
- Integrated system monitoring （vs FSUSB242)
設計ノート
Treat the USB SuperSpeed pairs as controlled-impedance interconnects from the connector or source through the TUSB542RWQR to the destination. Follow the manufacturer’s recommended layout for the 18-pin X2QFN (RWQ) package, keep the differential routes short and symmetrical, maintain a continuous reference plane, and remove unnecessary stubs. Changes in layer geometry, plane splits, or via transitions can consume margin that cannot be recovered by equalization alone.
Determine equalization and output-swing settings from the complete channel response rather than from PCB trace length alone. The TUSB542RWQR supports equalization up to 9 dB and swing adjustment up to 6 dB, but excessive compensation can alter eye geometry or interoperability with the connected USB device. Compare eye diagrams, differential impedance, insertion loss, and reflections with the intended cable, connector, host, and peripheral combinations before freezing the settings.
Budget the device across all three published operating states: 100 mA active, 1.3 mA in U2/U3, and 300 µA with no connection. Provide local supply decoupling and route it through the package pins specified by the manufacturer layout. If system power management depends on signal monitoring or RX-detect behavior, verify that the control logic interprets the device’s signaling correctly during enumeration, lane training, suspend, and disconnect transitions.
Do not treat a device with a similar USB redriver function as interchangeable solely because its data rate appears compatible. A true replacement must preserve the RWQ footprint, pin assignment, control logic, channel count, electrical limits, and 5 Gbps behavior. Review de-emphasis, equalization, termination, monitor outputs, and low-power states during schematic and PCB review rather than checking only the connector-side pins.
コンプライアンス情報
The manufacturer ordering information identifies TUSB542RWQR as active but does not establish RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. Obtain current declarations and quality documentation before releasing a regulated design.
