USB5742/2G - 2-Port SS/HS USB 3.1 SmartHub Controller | Microchip
N.º da peça: USB5742/2G ✓ Ativo| Qtd. | Preço unitário | Total |
|---|---|---|
| 1 | $7.39 | $7,39 |
| 10 | $6.8 | $68,00 |
| 100 | $5.95 | $595,00 |
| 500 | $5.1 | $2.550,00 |
| 1.000 | $4.45 | $4.450,00 |
USB5742/2G Visão geral
A SmartHub is a USB hub controller IC with integrated bridge logic and configurable firmware that adds value features beyond the basic USB hub function defined by the USB-IF. As a category, SmartHub belongs to the USB Interface IC family (a subset of Interface ICs > Integrated Circuits), sitting between root hosts and downstream USB peripherals and providing functions such as port-power switching, per-port enable, programmable GPIO, and flexible upstream port mapping. The USB5742 specifically implements Microchip's fifth-generation USB 2.0 hub feature controller operating in parallel with a SuperSpeed transaction translator, decoupling 5 Gbps SuperSpeed signalling from legacy 480 Mbps traffic and removing the legacy FS/LS signalling bottleneck of older USB-IF transaction translator rules.
Key features include full USB Battery Charging v1.2 support including CDP/DCP modes, integrated 5 V VBUS switch drivers with per-port overcurrent protection, USB Link Power Management (LPM) Addendum compliance for U1/U2/U3 low-power states, role-swapping for reversible Type-C wiring, and Microchip's proprietary Multi-Transaction Translator (Multi-TT) for full 480 Mbps bandwidth on all downstream ports simultaneously. The device operates from a single 3.3 V supply, integrates a 5 V to 3.3 V regulator for internal logic, and the -40C to +85C industrial temperature grade supports embedded OEM use.
Typical applications include two-port docking stations, embedded USB expansion for industrial PCs, automotive rear-seat USB chargers, USB Type-A wall chargers with smart-charging, and head-unit infotainment connectivity modules. The SPI host interface allows an external MCU to enumerate attached devices, customize charging profiles, and read port events.
When designing with the USB5742/2G, ensure the 56-VQFN exposed pad is properly soldered to a contiguous ground plane of at least 1 square inch to meet the 90 mA unconfigured VBUS-current budget. Bypass the 3.3 V rail with 10 uF + 100 nF ceramic capacitors placed within 5 mm of the supply pin, and follow USB-IF HS/SS routing rules (90-ohm differential impedance, intra-pair skew under 15 ps).
This page synthesizes distributor pricing, drop-in equivalent SmartHub alternatives, and practical layout guidance not found in the standalone manufacturer datasheet.
Alternativas drop-in para USB5742/2G — mesmo encapsulamento, compatível pino a pino. Peças de encapsulamento diferente que exigem retrabalho na PCB são excluídas.
Ferramenta de comparação rápida — selecione peças alternativas para comparação lado a lado:
USB5742B/2G
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
USB5742T/2G
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
USB5742T-I/2G
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
USB5742-I/2G
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
USB5742B-I/2G
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
USB5742/2GX01
✅ Drop-In📋 Alternativa de referência (fora do catálogo)
USB5742/2G Especificações
| Product Type | USB 3.1 Gen 1 SmartHub Hub Controller |
| Manufacturer | Microchip Technology |
| Family | SmartHub USB 3.x Hub Controller |
| Number of Downstream Ports | 2 |
| USB Specification Compliance | USB 3.1 Gen 1 (USB 3.2 Gen 1 equivalent); USB 2.0 LPM Addendum |
| Supported USB Speeds | SuperSpeed 5 Gbps; Hi-Speed 480 Mbps; Full-Speed 12 Mbps; Low-Speed 1.5 Mbps |
| Host Interface | SPI / SMBus configuration port |
| Upstream Port | USB Type-A receptacle / fixed 5 Gbps port |
| Número de pinos | 56 |
| Encapsulamento | VQFN-56 (7x7 mm) with exposed thermal pad |
| Tipo de montagem | Surface Mount |
| Tensão de alimentação | 3.3 V (single rail); integrated 5 V-to-3.3 V regulator |
| Faixa de temperatura de operação | -40 C to +85 C (industrial grade) |
| USB Battery Charging Support | Charging v1.2 (SDP / CDP / DCP modes) |
| VBUS Per-Port Switch | Integrated 5 V switch driver with overcurrent protection |
| Status RoHS | Compliant |
| Multi-TT / Multi-Transaction Translator | Yes (per-port, parallel TT) |
Guia de Configuração de Pinos do USB5742/2G vqfn-56 (7x7 mm) with exposed thermal pad
Configuração de pinos para USB5742/2G (pacote vqfn-56 (7x7 mm) with exposed thermal pad). A numeração dos pinos, funções e diagramas de conexão estão definidos no datasheet do fabricante. Consulte-o para o footprint exato e diretrizes de soldagem.
Nenhum dado detalhado de pinagem disponível para USB5742/2G.
Consulte a ficha técnica para a configuração completa dos pinos.
Aplicações típicas
USB5742/2G é adequado para 7 aplicaçãos: Embedded USB Expansion Module (Industrial PCs), Two-Port USB 3.1 Docking Station, USB Charging Hub (Wall / Desktop Multi-Port Charger), Automotive Rear-Seat USB Ports / Infotainment, Medical Imaging / Diagnostic Workstation, Embedded Test / Programming Station, DVR / NVR External USB Storage Hub.
Embedded USB Expansion Module (Industrial PCs)
Used as a 2-port internal USB 3.1 hub on industrial PC motherboards, factory-automation controllers, and ruggedized thin clients. The USB5742/2G's -40C to +85C industrial temperature range and SuperSpeed 5 Gbps per-port throughput enable dual-camera vision inspection streams plus Hi-Speed HID input devices without upstream bandwidth contention. Multi-TT allocates full 480 Mbps to each downstream port, preventing older FS/LS HID devices from bottlenecking SS traffic. The single 3.3 V supply and integrated 5 V VBUS switches remove the external high-side switch array, dropping BOM cost and PCB area. The SPI configuration port lets the host CPU reprogram port-power profiles at boot to match attached peripheral mix, supporting industrial OEM differentiation without firmware changes to the hub itself.
Recomendado
Two-Port USB 3.1 Docking Station
Provides downstream SuperSpeed connectivity for docking stations targeting laptops, thin clients, and POS terminals. The USB5742/2G's upstream 5 Gbps pipe aggregates data from two SS peripherals (external SSD plus display adapter) and delivers to the host at full 5 Gbps aggregate, with USB Battery Charging v1.2 CDP mode enabling 1.5 A downstream charging while data is active. Multi-TT ensures a connected USB 2.0 audio headset and SS SSD share bandwidth correctly. The exposed thermal pad of the 56-VQFN simplifies ground-plane layout. Docking station OEMs benefit from Microchip's role-swap support for Type-C reversible cable routing, reducing SKU count for legacy Type-A and modern Type-C docks through the same hub silicon.
Recomendado
USB Charging Hub (Wall / Desktop Multi-Port Charger)
The USB5742/2G's USB Battery Charging v1.2 SDP/CDP/DCP modes make it a fit for desktop charging hubs that also expose data upstream when desired. Per-port integrated 5 V VBUS switches with overcurrent protection eliminate external high-side switches, allowing up to 2.4 A per port while staying within USB-IF and UL 60950 safety limits. Host-side SPI configuration lets the OEM push custom charging profiles (Apple 2.4 A legacy mode, BC 1.2 CDP, proprietary Samsung DCP) into the hub's OTP. The industrial -40C to +85C temperature grade supports chargers operated in enclosed cabinets or vehicle dashboards. Pairing with a USB Type-C port-controller delivers modern cable roles while leveraging a mature, well-supported USB5742 hub core.
Recomendado
Automotive Rear-Seat USB Ports / Infotainment
USB5742/2G drops directly into rear-seat entertainment / cabin-charging head units needing two SS ports with USB-IF BC 1.2 charging. The -40C to +85C industrial temperature grade covers the cabin use case; designers targeting full AEC-Q100 qualification should evaluate Microchip's USB5742B-I/2G automotive-revision variant or wait for dedicated AEC-Q100 grade availability. Multi-TT enables simultaneous SS media streaming from a tablet plus BC 1.2 charging on the second port without bandwidth starvation. Link Power Management Addendum support reduces quiescent current when backseat ports are idle with the engine running, easing load-dump survival. The 56-VQFN integrates cleanly into the noisy automotive power environment when paired with TVS protection and common-mode chokes on SuperSpeed pairs.
Recomendado
Medical Imaging / Diagnostic Workstation
USB5742/2G provides two SuperSpeed ports for medical imaging peripherals such as endoscopy USB cameras, ultrasound probes, and patient data card readers. SuperSpeed 5 Gbps supports uncompressed medical video streams up to HD resolution; Hi-Speed Multi-TT isolates HID-class input devices (foot pedals, custom keyboards) from SS isochronous traffic. The -40C to +85C industrial temperature range and proven Microchip hub reliability make it a fit for IEC 60601-1 compliant certified equipment when paired with proper isolation. SPI/SMBus access to port status supports regulated audit trails of connected peripherals. Long-term availability from Microchip's automotive-grade silicon revisions supports medical-device life-cycle requirements.
Recomendado
Embedded Test / Programming Station
Manufacturing test fixtures and in-line device programmers benefit from the USB5742/2G's deterministic per-port bandwidth, USB-IF BC 1.2 CDP/SDP modes, and Microchip's USB 2.0 hub feature controller heritage. Multi-TT removes the legacy 64-byte FS packet bottleneck when simultaneously stress-testing SS and HS devices, enabling higher test-cell throughput. The SPI configuration port supports host-driven port-reset/port-isolate sequences used by automated test equipment to recover downstream devices without manual unplug. The exposed thermal pad of the 56-VQFN simplifies chassis-mount integration in ICT fixtures and the industrial temperature grade covers factory-floor thermal environments.
Recomendado
DVR / NVR External USB Storage Hub
Surveillance DVRs and NVRs use the USB5742/2G to expand internal USB 3.1 ports for external backup storage, where 5 Gbps aggregate throughput enables rapid archiving of video segments without constraining the surveillance pipeline. The 2 downstream ports support dual external HDDs or SSDs in RAID configurations, while Multi-TT isolates HID-based PTZ control keyboards from storage traffic. USB BC 1.2 modes allow fan-less HDD enclosures to be bus-powered when configured for SDP, simplifying installation in distributed surveillance cabinets. Microchip's predictable long-term supply and industrial temperature grade suit 24/7 operation in unattended server-room environments.
Recomendado
Resumo dos produtos recomendados
Dados de referência de engenharia para USB5742/2G — comparação, orientação de projeto e informações de conformidade.
Guia de seleção
Comparação com alternativas
| Parâmetro | Este produto | USB5742B/2G | USB5742T/2G | USB5742T-I/2G | USB5742B-I/2G | USB5742/2GX01 |
|---|---|---|---|---|---|---|
| Brand | Microchip Technology | Microchip Technology (same) | Microchip Technology (same) | Microchip Technology (same) | Microchip Technology (same) | Microchip Technology (same) |
| Package | VQFN-56 (7x7 mm) | VQFN-56 (7x7 mm) - same | VQFN-56 (7x7 mm) - same | VQFN-56 (7x7 mm) - same | VQFN-56 (7x7 mm) - same | VQFN-56 (7x7 mm) - same |
| Number of Downstream Ports | 2 | 2 | 2 | 2 | 2 | 2 |
| USB Speed Support | SS 5 Gbps + HS 480 Mbps (with Multi-TT) | SS 5 Gbps + HS 480 Mbps (with Multi-TT) | SS 5 Gbps + HS 480 Mbps (with Multi-TT) | SS 5 Gbps + HS 480 Mbps (with Multi-TT) | SS 5 Gbps + HS 480 Mbps (with Multi-TT) | SS 5 Gbps + HS 480 Mbps (HFC disabled) |
| Silicon Revision | A1 (legacy) | B1 (current) | A1 (legacy, T&R variant) | A1 industrial (T&R) | B1 industrial | X01 (HFC disabled) |
| Temperature Grade | Industrial -40C to +85C | Industrial -40C to +85C | Industrial -40C to +85C | Industrial -40C to +85C | Industrial -40C to +85C | Industrial -40C to +85C |
| Hub Feature Controller (HFC) | Enabled (default) | Enabled | Enabled | Enabled | Enabled | Disabled (host MCU required) |
| USB Battery Charging v1.2 Support | Yes (SDP / CDP / DCP) | Yes | Yes | Yes | Yes | Yes |
Principais diferenciais
- Mature 5th-generation USB 2.0 hub feature controller legacy (vs Generic 2-port USB 3.x hubs)
- Integrated per-port 5 V VBUS switches with overcurrent (vs Discrete hub controllers requiring external high-side switches)
- Multi-Transaction Translator (Multi-TT) per port (vs Single-TT or shared-TT USB 2.0 hubs)
Notas de projeto
Estimated: at 3.3 V x 0.2 A active supply plus switching losses on integrated 5 V VBUS switches, the 56-VQFN dissipates approximately 1.0 W at full SuperSpeed throughput per port. With typical VQFN-56 7x7 mm theta_JA around 32 C/W on a 4-layer 1-oz PCB with a 1 sq-in ground copper pour under the exposed pad, junction temperature rises roughly 32 C above ambient. For sustained operation above ambient 70 C, expand the underside ground pour to at least 2 sq-in and ensure the exposed pad is soldered with multiple thermal vias (0.3 mm pitch). This eliminates thermal throttling of the integrated 5 V VBUS switches at 1.5 A per port.
Follow USB-IF SuperSpeed routing rules: 90-ohm differential impedance for SuperSpeed pairs with intra-pair skew under 15 ps, no 90-degree bends, and continuous reference plane on layer 2. Place the 100 nF high-frequency bypass capacitor within 5 mm of the VDD pin and a 10 uF bulk capacitor at the regulator output. Keep SuperSpeed traces length-matched within 150 mil (3.8 mm) to maintain common-mode balance. Place the 12 MHz reference crystal within 5 mm of the XIN/XOUT pads with a guard ring tied to analog ground. Maintain 4 mm separation between SuperSpeed pairs and DC-DC switch-node copper to avoid radiated SS jitter.
Do not assume USB Battery Charging v1.2 modes are enabled by default in OTP - they must be configured via the SPI/SMBus port during production programming or pre-loaded by Microchip at order. Also note that selecting the X01 SKU disables the internal Hub Feature Controller, requiring the host MCU to enumerate all downstream ports manually; X01 is not a drop-in replacement for firmware expecting an autonomous hub. Finally, do not populate downstream VBUS caps above 22 uF per port, as the soft-start behaviour of the integrated switches is tuned for that range and larger values trigger false overcurrent faults during plug-in. Verify cable-attach behaviour with your specific charger/load combination.
Informações de conformidade
RoHS compliant per Microchip product environmental compliance statement. The /2G part is the standard industrial version; /2G automotive-grade testing would require microchip-part-specific AEC-Q100 documentation, which has not been confirmed for this SKU in the verified web data - see USB5742B-I/2G or AEC-Q100 specific variants if automotive is required.
