TUSB8020B-Q1 - Automotive 2-Port USB 3.0 Hub 5Gbps | TI
N.º de pieza: TUSB8020B-Q1 ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $4.95 | $4,95 |
| 10 | $4.45 | $44,50 |
| 25 | $4.12 | $103,00 |
| 100 | $3.65 | $365,00 |
| 250 | $3.3 | $825,00 |
TUSB8020B-Q1 Descripción general
A USB 3.0 hub is a protocol-aware repeater and transaction router defined by the Universal Serial Bus 3.0 specification. It sits in the hierarchy: hub controller -> USB interface IC -> interface IC -> semiconductor. Hubs enumerate as a device on the upstream bus and present one or more downstream ports, forwarding SuperSpeed packets with minimal latency while managing enumeration, power switching, and error handling for attached devices.
Key features include USB 2.0 Multi Transaction Translator (MTT) architecture with two transaction translators and four asynchronous endpoint buffers per translator, support for USB Battery Charging Specification Revision 1.2 (BC 1.2) enabled per port via REG_6h(batEn[1:0]), and per-port or ganged power switching with over-current protection. Configuration is handled through SMBus, I2C, GPIO straps, or internal EEPROM/bootloader settings, giving designers flexible deployment options in embedded systems.
The device integrates the SuperSpeed PHY and link-layer logic, supporting 5.0 Gbps differential signaling on both upstream and downstream lanes. AEC-Q100 automotive qualification makes it suitable for in-vehicle infotainment USB ports, telematics modules, and ADAS peripheral connectivity where temperature range and quality standards are mandatory.
Typical applications include automotive head-unit and infotainment USB charging/connectivity ports, telematics gateways, industrial HMI panels with USB device access, and docking solutions requiring BC 1.2 charging detection.
Design consideration: configure power-switch polarity and over-current inputs correctly (for example OVERCUR1z and PWRCTL_POL/SS_DN1 straps) when the mainboard does not supply VBUS to external devices, per TI E2E guidance.
Alternativas directas para TUSB8020B-Q1 — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
TUSB8020BIPHPQ1
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
TUSB8020BPHP
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
TUSB4020BI-Q1
⚡ Mismo encapsulado📋 Alternativa de referencia (no en el catálogo)
TUSB4020BI
⚡ Mismo encapsulado📋 Alternativa de referencia (no en el catálogo)
TUSB8020B-Q1 Especificaciones
| Función | Two-Port USB 3.0 Hub Controller |
| USB Standard | USB 3.0 (SuperSpeed 5.0 Gbps), USB 2.0 compatible |
| Number of Downstream Ports | 2 |
| Velocidad de datos | 5.0 Gbps SuperSpeed |
| Interfaz | USB, GPIO, I2C, SMBus |
| Battery Charging Support | USB BC 1.2 (per-port enable via REG_6h(batEn[1:0])) |
| Transaction Translators | 2 (Multi Transaction Translator, MTT) |
| Power Switching | Per-port or ganged with over-current protection |
| Temperatura de funcionamiento | -40C to +85C |
| Automotive Qualification | AEC-Q100 (Q1) |
| Encapsulado | 48-HTQFP (7x7 mm) |
| Tipo de montaje | Surface Mount |
| Configuration | SMBus / I2C / GPIO / EEPROM |
Configuración de pines de TUSB8020B-Q1
| Pin 1 | VDD33 — 3.3 V power supply |
| Pin 2 | GND — Ground |
| Pin 3 | SS_TX1P — SuperSpeed downstream port 1 TX positive |
| Pin 4 | SS_TX1N — SuperSpeed downstream port 1 TX negative |
| Pin 5 | SS_RX1P — SuperSpeed downstream port 1 RX positive |
| Pin 6 | SS_RX1N — SuperSpeed downstream port 1 RX negative |
| Pin 7 | OVERCUR1z — Over-current indication, downstream port 1 (active low) |
| Pin 8 | PWRCTL_POL/SS_DN1 — Power control polarity strap / SS downstream 1 |
| Pin 9 | GANGED/SMBA2/HS_UP — Ganged mode / SMBus address / HS upstream strap |
| Pin 10 | SCL — SMBus/I2C clock |
| Pin 11 | SDA — SMBus/I2C data |
| Pin 12 | RESETz — Reset (active low) |
| Pin 13 | XI — Crystal input / reference clock in |
| Pin 14 | XO — Crystal output |
| Pin 15 | SS_UP_TXP — SuperSpeed upstream TX positive |
| Pin 16 | SS_UP_TXN — SuperSpeed upstream TX negative |
| Pin 17 | SS_UP_RXP — SuperSpeed upstream RX positive |
| Pin 18 | SS_UP_RXN — SuperSpeed upstream RX negative |
| Pin 19 | DP_UP — USB 2.0 upstream D+ |
| Pin 20 | DM_UP — USB 2.0 upstream D- |
Aplicaciones típicas
TUSB8020B-Q1 es adecuado para 6 aplicacións: Automotive Infotainment USB Ports, Telematics and Connectivity Gateways, ADAS and Data-Logging Modules, Industrial HMI and Panel PCs, USB Docking and Charging Modules, Medical and Lab Instrument USB Connectivity.
Automotive Infotainment USB Ports
The TUSB8020B-Q1 fits head-unit and rear-seat infotainment USB connectivity because it combines 5.0 Gbps SuperSpeed data throughput with USB BC 1.2 charging signatures on each downstream port, enabled per port via REG_6h(batEn[1:0]). Its AEC-Q100 qualification and -40C to +85C range meet automotive cabin reliability requirements. Placed between the head unit SoC USB port and the vehicle connector panel, the hub expands one upstream port into two user-accessible ports while per-port power switching allows the MCU to disable ports when not in use.
Recomendado
Telematics and Connectivity Gateways
Telematics control units need to expose USB for diagnostics, dongles, and data logging while surviving harsh vehicle environments. The TUSB8020B-Q1 provides two 5.0 Gbps downstream ports with simultaneous SuperSpeed and high-speed/full-speed handling on the upstream link, so legacy USB 2.0 and modern USB 3.0 devices enumerate correctly. Its SMBus/I2C configuration interface lets the gateway MCU set port power policies at boot, and per-port over-current inputs protect the vehicle power rail from faulty cables or devices.
Recomendado
ADAS and Data-Logging Modules
ADAS prototyping kits and vehicle data loggers offload large sensor recordings to USB 3.0 storage. The TUSB8020B-Q1 sustains SuperSpeed 5.0 Gbps transfers on its two downstream ports, enough to stream recorded camera and radar data to SSD media. Because it operates from -40C to +85C and is AEC-Q100 qualified, it can be placed in enclosures near the windshield or under the dashboard without derating concerns. The Multi Transaction Translator (MTT) with two translators also keeps low-speed debug adapters from blocking high-speed traffic.
Recomendado
Industrial HMI and Panel PCs
Industrial touch panels expose USB for keyboards, scanners, and service access. The TUSB8020B-Q1, though automotive qualified, is equally at home in industrial HMI designs: two 5.0 Gbps ports handle modern peripherals while the MTT architecture with four asynchronous endpoint buffers per transaction translator keeps mixed-speed devices responsive. GPIO or EEPROM configuration enables production-line programming without an I2C host, and per-port or ganged power switching simplifies compliance with USB power budgets on 24 V industrial systems.
Recomendado
USB Docking and Charging Modules
Docking modules that combine data and charging benefit from the TUSB8020B-Q1 per-port BC 1.2 battery charging support and per-port power switching. Each downstream port can independently present a charging signature via REG_6h(batEn[1:0]) while still supporting full 5.0 Gbps data when a host is present. Over-current inputs such as OVERCUR1z allow external power switches to signal fault conditions back to the hub, so a shorted device disables only its own port rather than the shared rail.
Recomendado
Medical and Lab Instrument USB Connectivity
Bench instruments and patient-adjacent diagnostic devices use USB hubs to connect scanners, printers, and data interfaces. The TUSB8020B-Q1 provides simultaneous SuperSpeed and high-speed/full-speed enumeration, ensuring both modern storage and legacy HID devices work on the same downstream ports. Its EEPROM-based configuration allows OEM-specific VID/PID programming for branding, and the wide -40C to +85C rating covers unconditioned laboratory transport environments. The 48-HTQFP surface-mount package supports compact board designs inside instrument chassis.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para TUSB8020B-Q1 — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | TUSB8020BIPHPQ1 | TUSB8020BPHP | TUSB4020BI-Q1 |
|---|---|---|---|---|
| Package | 48-HTQFP (7x7 mm) | 48-HTQFP (7x7 mm) - same | 48-HTQFP (7x7 mm) - same | 48-HTQFP (7x7 mm) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| USB Standard | USB 3.0 (5.0 Gbps SuperSpeed) | USB 3.0 (5.0 Gbps) | USB 3.0 (5.0 Gbps) | USB 2.0 only (480 Mbps) |
| Number of Ports | 2 downstream | 2 downstream | 2 downstream | 2 downstream |
| Automotive Qualification | AEC-Q100 (Q1) | AEC-Q100 (Q1) | Commercial grade | AEC-Q100 (Q1) |
Diferenciadores clave
- AEC-Q100 automotive qualification (frente a TUSB8020BPHP)
- SuperSpeed 5.0 Gbps throughput (frente a TUSB4020BI-Q1)
- Per-port BC 1.2 battery charging (frente a TUSB4020BI-Q1)
Notas de diseño
Configure the power-management straps correctly when the mainboard does not supply VBUS to external devices. Per TI E2E guidance (thread 862044), OVERCUR1z must be properly terminated if over-current sensing is unused, and PWRCTL_POL/SS_DN1 and GANGED/SMBA2/HS_UP straps define power-switch polarity and per-port vs ganged switching. Misstrapping these pins is the most common cause of ports failing to enable at bring-up.
SuperSpeed 5.0 Gbps lanes require 90-ohm differential impedance routing with matched intra-pair skew and length-matched traces to the connector. Keep SS pairs away from switching regulator nodes and crystal circuits; use ground stitching vias along the pair. The USB 2.0 D+/D- pairs need 90-ohm differential routing as well. Refer to TI datasheet SLLSEF7 layout guidelines.
Provide clean 3.3 V and the appropriate core supply with local decoupling (100 nF ceramic close to each supply pin plus bulk capacitance). Use a 24 MHz crystal or reference clock at XI/XO per datasheet requirements. Size the downstream VBUS switching FETs for the charging current implied by BC 1.2 operation and verify the power-switch RDS(on) drop stays within USB VBUS droop limits.
Información de cumplimiento
AEC-Q100 automotive qualification is implied by the Q1 designation per TI product page. RoHS/REACH status not stated in provided data - verify on TI product page.
