TMUXHS4446RETT - USB-C 10Gbps Alt Mode Crossbar Mux | Texas Instruments
부품 번호: TMUXHS4446RETT ✓ 활성| 수량 | 단가 | 합계 |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
TMUXHS4446RETT 개요
A crosspoint switch or crossbar mux is a switching matrix in which any input lane can be routed to any output lane, giving system designers complete flexibility in high-speed signal routing. In the USB Type-C ecosystem, crossbar switches sit between the SuperSpeed/sideband pins of the USB-C connector and a device's USB 3.2 or DisplayPort controller, resolving the orientation and alternate-mode ambiguity that the reversible Type-C connector introduces. As such, it belongs to the analog switch and multiplexer family within signal-switching ICs, sitting between the USB-C connector and the SoC in the system hierarchy.
Key features include support for USB 3.2 Gen2 (10 Gbps) SuperSpeed lanes and DisplayPort 1.4/2.1 UHBR10 signaling, integrated low-speed SBU switching for DisplayPort auxiliary (AUX) channels, and a passive, bidirectional switch architecture that adds minimal signal degradation. The 7-ohm typical on-resistance minimizes insertion loss impact on high-speed differential pairs, helping preserve eye diagrams at 10 Gbps rates.
Architecturally, the TMUXHS4446 is a passive FET-switch crossbar rather than an active redriver or retimer. This means it consumes minimal power, introduces no added latency, and does not regenerate the signal, so total channel budget must account for its on-resistance and capacitive loading. Passive switching makes it ideal when the host and device have adequate link budget and no equalization is required.
Typical applications include USB Type-C docks and dongles that switch between USB 3.2 and DisplayPort alternate mode, notebooks and tablets routing DP 1.4/2.1 lanes to a USB-C port, monitors with USB-C inputs, and smartphone or mobile-compute platforms requiring USB-C orientation and alternate-mode switching.
A key design consideration is that because the part is passive, total insertion loss across the connector, PCB traces, and switch must fit the USB 3.2 Gen2 or DP UHBR10 channel budget; keep routing short and impedance-controlled. Follow TI's datasheet layout guidance for the exposed-pad WQFN.
This page synthesizes distributor pricing data, drop-in alternative analysis, and practical design notes that go beyond the manufacturer datasheet, giving engineers a single citable reference for the TMUXHS4446RETT.
드롭인 대체품: TMUXHS4446RETT — 동일 패키지, 핀 호환. PCB 재작업이 필요한 다른 패키지 부품은 제외됩니다.
빠른 비교 도구 — 나란히 비교할 대체 부품을 선택하십시오:
TMUXHS4446RETT-Q1
✅ 드롭인 ⚠️ 사양 미검증📋 참조 대체품 (카탈로그에 없음)
TMUXHS4446RETT 사양
| 기능 | High-speed bidirectional passive crosspoint switch (crossbar / Xbar) |
| Configuration | 6 x 4 mux (4 circuits, 4:4) |
| On-Resistance (Typ) | 7 ohm |
| 데이터 속도 | 10 Gbps (USB 3.2 Gen2 / DisplayPort UHBR10) |
| Supported Protocols | USB 3.2 Gen2 SuperSpeed, DisplayPort 1.4 / 2.1 (UHBR10) |
| Low-Speed Switching | SBU signals for DisplayPort AUX channel |
| 인터페이스 | USB Type-C (USB-C) alternate mode |
| Architecture | Passive, bidirectional switch |
| 패키지 | 40-WQFN (6 mm x 3 mm), exposed pad |
| 실장 유형 | Surface Mount |
| 핀 수 | 40 |
TMUXHS4446RETT 40-wqfn (6 mm x 3 mm), exposed pad 핀 구성 가이드
TMUXHS4446RETT(40-wqfn (6 mm x 3 mm), exposed pad 패키지)의 핀 구성입니다. 핀 번호, 기능, 연결 다이어그램은 제조사 데이터시트에 정의되어 있습니다. 정확한 풋프린트와 솔더링 지침은 해당 문서를 참조하십시오.
다음에 대한 상세 핀아웃 데이터 없음: TMUXHS4446RETT.
다음을 참조하십시오: 데이터시트 전체 핀 구성은 다음을 참조하십시오.
일반적인 애플리케이션
TMUXHS4446RETT 적합 용도: 6 애플리케이션s: USB Type-C Docks and Dongles, Notebook and Tablet USB-C Ports, USB-C Monitors, Docking Stations for Enterprise Workstations, Mobile and Smartphone USB-C Routing, Test and Measurement Adapters.
USB Type-C Docks and Dongles
USB-C docks and dongles must route either USB 3.2 Gen2 SuperSpeed pairs or DisplayPort lanes to the same Type-C connector SuperSpeed pins depending on negotiated alternate mode. The TMUXHS4446RETT fits this role because its 6x4 crossbar topology allows any high-speed lane to reach any connector lane, resolving both connector orientation reversal and USB/DP alt-mode switching in one device. Its passive architecture with 7 ohm typical on-resistance keeps added insertion loss small on short dock PCBs, preserving the 10 Gbps channel budget for USB 3.2 Gen2 and DP UHBR10 compliance. Integrated SBU switching also handles the DP AUX channel, eliminating a separate low-speed mux and reducing board area in compact dongle housings where every square millimeter counts.
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Notebook and Tablet USB-C Ports
Modern notebooks and tablets expose one or more USB-C ports that must support USB 3.2 Gen2 data plus DisplayPort 1.4/2.1 alt-mode output. The TMUXHS4446RETT sits between the application processor's PHY outputs and the Type-C connector, cross-routing lanes as negotiated by the USB Power Delivery controller. Because it is passive and bidirectional, it adds negligible power draw to battery-operated designs and no protocol latency, which matters for DisplayPort link training at UHBR10 rates. The small 6 mm x 3 mm 40-WQFN footprint suits the tight board space around the Type-C connector. Designers should keep PHY-to-mux-to-connector trace lengths short so total insertion loss, including the 7 ohm switch resistance, fits the channel budget.
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USB-C Monitors
USB-C monitors receive DisplayPort video plus USB data over a single cable. At the monitor input, the TMUXHS4446RETT cross-routes incoming SuperSpeed/SBU lanes between the monitor's DisplayPort receiver and USB hub upstream path according to the negotiated alt mode. Passive switching with 7 ohm typical on-resistance helps the monitor input meet DP 1.4/2.1 UHBR10 compliance because the monitor-side trace budget is already consumed by connector and receiver losses. The integrated SBU/AUX switching ensures the DP auxiliary channel is routed correctly during link training. Using one crossbar device instead of discrete lane muxes simplifies the input stage and reduces the chance of channel mismatch between the four DP lanes.
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Docking Stations for Enterprise Workstations
Enterprise docking stations combine multiple USB-C and DisplayPort outputs, and the TMUXHS4446RETT provides lane-level routing flexibility when a single DP source must be distributed across different physical connectors or when lane counts vary by negotiated mode. The crossbar's any-to-any connectivity means board revisions that swap connector positions do not require controller firmware changes, only mux configuration updates. Its passive design keeps dock idle power low, relevant for ENERGY STAR-class products, and avoids adding jitter at 10 Gbps UHBR10. The exposed-pad WQFN provides solid grounding for return-current integrity across high-speed transitions. Validate total dock channel loss including connectors, traces, and the 7 ohm switch path during compliance testing.
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Mobile and Smartphone USB-C Routing
Smartphones with USB-C ports require extremely compact, low-power switching between USB 3.2 Gen2 and DP alt-mode signals inside a densely populated main board. The TMUXHS4446RETT's 6x3 mm WQFN and passive, near-zero static consumption suit these constraints, while the crossbar resolves connector flip needed by the reversible Type-C receptacle. At 10 Gbps, the phone's short but lossy flex-to-board routing benefits from the switch's low 7 ohm on-resistance and low parasitic capacitance. Integrated SBU switching routes the DP AUX lines used during DisplayPort link training without an additional analog switch. Phones shipping DP-alt-mode video out, mirroring to monitors and TVs, are the primary beneficiary of this single-device routing solution.
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Test and Measurement Adapters
Protocol analyzers, compliance fixtures, and debug adapters for USB-C benefit from the TMUXHS4446RETT because the crossbar allows an instrument to present signals to any lane of a device under test without rewiring. The passive switch preserves signal fidelity at 10 Gbps with no added protocol latency, so eye-diagram and TDR measurements reflect the DUT's true characteristics rather than amplifier distortion; the 7 ohm on-resistance contributes only a small, predictable loss that can be de-embedded. The SBU switching also lets instruments capture DP AUX traffic. Fixture designers should control the fixture-side trace geometry carefully so the switch's channel contribution remains within the compliance-test margin.
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추천 제품 요약
엔지니어링 참조 데이터: TMUXHS4446RETT — 비교, 설계 지침 및 규정 준수 정보.
선택 가이드
대체품과의 비교
| 파라미터 | 이 제품 | TMUXHS4446RETT-Q1 |
|---|---|---|
| Package | 40-WQFN (6x3 mm) EP | 40-WQFN (6x3 mm) EP - same |
| Brand | Texas Instruments | Texas Instruments |
| Configuration | 6x4 crossbar (4:4, 4 circuits) | 6x4 crossbar (4:4, 4 circuits) |
| On-Resistance (Typ) | 7 ohm | 7 ohm |
| Max Data Rate | 10 Gbps (UHBR10) | 10 Gbps (UHBR10) |
| SBU / DP AUX Switching | Yes, integrated | Yes, integrated |
| AEC-Q100 Qualification | Not qualified (standard grade) | Qualified (automotive grade) |
주요 차별점
- Full crossbar (6x4) lane flexibility (vs TMUXHS444 (2:1 lane mux family))
- Integrated SBU/DP AUX switching (vs Discrete lane mux + separate low-speed switch)
- Passive architecture with no added latency (vs Redriver/retimer solutions (e.g., TUSB1046A-DCI))
설계 노트
Because the TMUXHS4446 is a passive switch, its 7 ohm typical on-resistance and parasitic capacitance are part of the total channel budget for USB 3.2 Gen2 and DisplayPort UHBR10 compliance. Keep the high-speed differential routing from connector to switch to PHY as short as practical, use 90-ohm differential impedance, minimize via transitions, and length-match lanes within the skew budget. Estimated: if a dock channel allows ~10 dB insertion loss at 5 GHz, budget the connector (~1 dB), traces (~0.5 dB/inch on standard FR-4), and the switch contribution before deciding whether a redriver such as the TUSB1046A-DCI is needed.
The 40-WQFN 6x3 mm package has an exposed pad that serves as the primary ground return. Solder it to a continuous ground pour with an array of thermal vias; a voided or cold exposed-pad solder joint will degrade return-current paths and cause intermittent eye-mask failures at 10 Gbps even though DC continuity still tests fine. Follow the datasheet land-pattern dimensions exactly and inspect with X-ray on first-article builds.
The crossbar configuration is set through control pins or I2C per the datasheet; ensure the USB PD controller (for example a TPS6598x device) drives the correct lane mapping for each negotiated alternate mode, including connector orientation. A mismatch between the PD contract and mux settings presents a dark screen or failed enumeration that is difficult to debug. Verify SBU/AUX routing is included in every alt-mode state, since DP link training fails immediately if AUX is not switched.
규정 준수 정보
Compliance details were not present in the retrieved web data; verify on the TI.com product page for TMUXHS4446. Standard (non-Q1) grade assumed not AEC-Q100 qualified.
