TUSB7320RKMR - USB 3.0 xHCI 2-Port Host Controller | Texas Instruments
N.º de pieza: TUSB7320RKMR ✓ Activo| Cant. | Precio unitario | Total |
|---|---|---|
| 1 | $6 | $6,00 |
| 10 | $5.45 | $54,50 |
| 100 | $4.8 | $480,00 |
| 500 | $4.2 | $2.100,00 |
| 1.000 | $3.7 | $3.700,00 |
TUSB7320RKMR Descripción general
An xHCI (eXtensible Host Controller Interface) host controller is the silicon that sits between a root-complex PCIe link and the physical USB ports on a system. The xHCI class driver in the OS enumerates USB 3.0/2.0/1.1 devices without requiring companion controllers, so a single TUSB7320 turns a PCIe-capable SoC or add-in card into a fully featured USB root hub. It belongs to the broader hierarchy of bus controllers -> interface ICs -> USB controllers -> SuperSpeed xHCI controllers -> mixed-signal semiconductors.
Key features include hardware-automated USB attached SCSI protocol (UASP), PCI Express x1 Gen 2 connectivity, integrated 5 Gbps PHY, per-port battery charging support, and integrated power switching/overcurrent logic. The WQFN-MR package exposes an exposed thermal pad and offers good thermal dissipation in dense designs. The device also supports USB legacy and modern BIOS hand-off, enabling universal compatibility across Windows, Linux, and embedded RTOS hosts.
Architecturally, the TUSB7320 uses a PCIe Gen 2 PHY paired with a protocol engine that handles transaction translation, scatter-gather DMA, and xHCI command ring processing. An embedded USB 3.0 PHY provides SuperSpeed signaling, while the USB 2.0 PHY supports the lower-speed pairs. The chip exposes SMBus for management, GPIO for port indicators, and JTAG for boundary-scan test.
Typical applications include desktop PC motherboards, industrial embedded PCs, USB 3.0 PCIe add-in cards, docking stations, point-of-sale terminals, industrial PCs, and test-and-measurement chassis that need reliable downstream USB 3.0 connectivity. The pin-compatible TUSB7340 covers the same use cases where four ports are required.
When designing with this part, allocate a solid ground reference under the WQFN thermal pad and stitch vias to inner ground planes for the 5 Gbps signal integrity. Provide adequate bulk capacitance on the 1.1 V and 3.3 V rails and follow TI reference layout for PCIe routing (90 ohm differential, length-matched within 150 mil).
This page synthesizes distributor pricing, drop-in alternatives, application context, and design guidance that go beyond a single datasheet table.
Alternativas directas para TUSB7320RKMR — mismo encapsulado, compatible pin a pin. Se excluyen las piezas de otro encapsulado que requieren retrabajo de la PCB.
Variantes de esta serie
Modelos de la misma serie compatibles directamente con TUSB7320RKMR (mismo factor de forma y huella) — difiere en Package, Supply Voltage, RoHS Status, Battery Charging Support, Downstream Ports.
Herramienta de comparación rápida — seleccione piezas alternativas para compararlas lado a lado:
TUSB7340RKMR
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
TUSB7340IRKMR
✅ Sustitución directa📋 Alternativa de referencia (no en el catálogo)
TUSB7320RKMR Especificaciones
| Función | USB 3.0 xHCI Host Controller |
| Number of Downstream Ports | 2 |
| USB Speed | SuperSpeed (5 Gbps), High/Full/Low Speed |
| Upstream Interface | PCIe x1 Gen 2 |
| Tensión de alimentación | 1.1 V and 3.3 V |
| Temperatura de funcionamiento | 0 °C to 70 °C |
| Encapsulado | 100-WQFN-MR (RKM) 9x9 mm |
| Pins | 100 |
| Technology | PCI, I2C, CMOS |
| Device Type | Line / Bus Controller |
| Tipo de montaje | Surface Mount |
| Estado RoHS | Compliant (Green) |
| xHCI Compliance | USB 3.0 xHCI 1.0 |
| Battery Charging Support | Yes (per-port) |
| JTAG / Boundary Scan | Yes |
| SMBus / GPIO | Yes |
Guía de configuración de pines de TUSB7320RKMR 100-wqfn-mr (rkm) 9x9 mm
Configuración de pines para TUSB7320RKMR (encapsulado 100-wqfn-mr (rkm) 9x9 mm). La numeración de pines, las funciones y los diagramas de conexión se definen en la hoja de datos del fabricante. Consúltela para conocer el footprint exacto y las directrices de soldadura.
No hay datos detallados de patillaje disponibles para TUSB7320RKMR.
Consulte la hoja de datos para ver la configuración completa de patillas.
Aplicaciones típicas
TUSB7320RKMR es adecuado para 6 aplicacións: Desktop PC Motherboard USB 3.0 Ports, USB 3.0 PCIe Add-in Card, Industrial Embedded PC / IPC, Docking Station Downstream USB, Point-of-Sale (POS) Terminal USB, Test & Measurement Instrumentation Chassis.
Desktop PC Motherboard USB 3.0 Ports
The TUSB7320RKMR is the canonical way to add two SuperSpeed USB 3.0 ports to a desktop motherboard that lacks native USB 3.0 routing. Its PCIe x1 Gen 2 upstream interface plugs into any standard root-complex slot, while the integrated 5 Gbps PHY eliminates external USB 3.0 PHY circuitry. The WQFN-MR 9x9 mm package fits under I/O shields on ATX boards, and TI's reference layout reduces PCIe signal-integrity validation time. Compared with on-chip USB 3.0, the TUSB7320 frees the SoC from USB controller silicon area and gives OEMs a known-good xHCI implementation with broad OS driver coverage on Windows, Linux, and ChromeOS.
Recomendado
USB 3.0 PCIe Add-in Card
The TUSB7320RKMR is purpose-built for retail USB 3.0 add-in cards that upgrade desktops lacking USB 3.0. Two downstream ports, xHCI compliance, and pin-compatibility with the 4-port TUSB7340 let card makers ship multiple SKUs from a single PCB design. Per-port battery charging support lets the card charge phones and tablets without a host-side BC 1.2 stack. The 100-pin WQFN-MR footprint and PCIe Gen 2 connectivity ensure 5 Gbps throughput on PCIe Gen 2 slots while remaining backward-compatible with Gen 1 root complexes at 2.5 Gbps.
Recomendado
Industrial Embedded PC / IPC
The TUSB7320RKMR is used inside industrial PCs and box PCs that need a reliable USB 3.0 host for machine vision cameras, data acquisition modules, and high-bandwidth storage. Its commercial 0-70 °C range covers most factory-floor enclosures, and TI's longevity program for the TUSB73x0 family reduces obsolescence risk for long-life industrial designs. The PCIe upstream interface lets designers pick x86 or ARM host SBCs that expose PCIe, while the xHCI driver stack ensures plug-and-play on Linux-based industrial distributions. Designers should add the TPD2EUSB30 for ESD protection on factory wiring.
Recomendado
Docking Station Downstream USB
Docking stations for laptops use the TUSB7320RKMR to expose two USB 3.0 downstream ports from a PCIe upstream link delivered by the dock's own PCIe switch fabric. The TUSB73x0 family is widely supported in dock reference designs because of its mature xHCI driver support and TI's reference firmware. The integrated battery-charging logic lets docks fast-charge phones without a separate BC 1.2 chip. Pin-compatibility with the TUSB7340 means docks can be offered in 2-port and 4-port variants from the same PCB.
Recomendado
Point-of-Sale (POS) Terminal USB
POS terminals use the TUSB7320RKMR to connect barcode scanners, receipt printers, customer displays, and cash drawers over USB. Two downstream ports are typically sufficient for a single-lane POS, while the TUSB7340 covers multi-lane checkouts. The xHCI driver stack ensures plug-and-play on POS Linux distributions, and the integrated USB 2.0 legacy support handles older HID-class peripherals without extra hub silicon. Adding the TPD2EUSB30 protects against ESD from frequent cable insertions in retail environments.
Recomendado
Test & Measurement Instrumentation Chassis
Test equipment such as protocol analyzers, oscilloscope acquisition modules, and modular instrumentation chassis use the TUSB7320RKMR to deliver high-throughput USB 3.0 to host PCs over PCIe backplane links. The integrated SuperSpeed PHY eliminates external 5 Gbps PHY BOM and reduces board area. Per-port battery charging support is helpful when the chassis powers connected handheld instruments. Designers pair the controller with the TUSB4041 hub when more than two downstream ports are needed on a single PCIe slot.
Recomendado
Resumen de productos recomendados
Datos de referencia de ingeniería para TUSB7320RKMR — comparación, orientación de diseño e información de cumplimiento.
Guía de selección
Comparación con alternativas
| Parámetro | Este producto | TUSB7340RKMR | TUSB7340IRKMR |
|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 100-WQFN-MR (RKM) 9x9 mm | 100-WQFN-MR (RKM) 9x9 mm - same | 100-WQFN-MR (RKM) 9x9 mm - same |
| Number of Downstream Ports | 2 | 4 | 4 |
| Upstream Interface | PCIe x1 Gen 2 | PCIe x1 Gen 2 | PCIe x1 Gen 2 |
| USB Speed | 5 Gbps SuperSpeed + USB 2.0/1.1 | 5 Gbps SuperSpeed + USB 2.0/1.1 | 5 Gbps SuperSpeed + USB 2.0/1.1 |
| Operating Temperature | 0 °C to 70 °C (commercial) | 0 °C to 70 °C (commercial) | -40 °C to 85 °C (industrial) |
| Supply Voltage | 1.1 V + 3.3 V | 1.1 V + 3.3 V | 1.1 V + 3.3 V |
| Battery Charging Support | Yes (per-port BC 1.2) | Yes (per-port BC 1.2) | Yes (per-port BC 1.2) |
Diferenciadores clave
- Pin-compatible 4-port upgrade path (frente a TUSB7340RKMR)
- Industrial temperature option (frente a TUSB7340IRKMR)
- Integrated 5 Gbps PHY (frente a Discrete USB 3.0 PHY + controller solutions)
Notas de diseño
Allocate a continuous, unbroken reference ground plane on the layer directly beneath the WQFN thermal pad and stitch vias in a 4x4 grid (0.5 mm pitch) tying the pad to inner ground layers. The TUSB73x0 datasheet specifies a 90-ohm differential impedance for PCIe and SuperSpeed pairs; route these over a continuous reference plane with length matching within 150 mil for PCIe and 5 mil for SS pairs. Series AC coupling capacitors (100 nF) are required on PCIe TX and SS TX lines and must be placed symmetrically.
Estimated: at full SuperSpeed operation with two active ports, the TUSB7320 draws approximately 1.0 A from the 1.1 V rail and 0.5 A from the 3.3 V rail. Provide at least 22 µF ceramic bulk on each rail placed within 25 mm of the IC, plus 0.1 µF high-frequency bypass at every supply pin. Use a low-noise LDO such as the TPS7A7002 for the 1.1 V rail; switching converters risk coupling noise into the PCIe reference clock.
PCIe reference clock (REFCLK+/-, 100 MHz) must be routed with 90-ohm differential impedance and isolated from noisy digital traces; series AC coupling capacitors are not required on REFCLK but must be on PETp/n. SuperSpeed USB TX/RX pairs require 85-ohm differential impedance and AC coupling on TX only (RX is DC-coupled to the device). Keep SS pairs at least 6 trace-widths away from any high-current switching node.
The 100-WQFN-MR 9x9 mm package dissipates roughly 1.5 W worst-case with two SuperSpeed ports active. The exposed thermal pad must be soldered to a copper pour of at least 1 square inch on the top layer, with a 5x5 thermal via array to inner ground planes. Without adequate thermal relief, junction temperature can approach 100 °C in enclosed chassis; verify with a thermocouple or IR camera under worst-case ambient.
Do not omit the PERSTn pull-up or fail to drive it from the PCIe slot's PERST# signal - missing PERSTn handling can leave the device in an undefined state across host resets. Do not route USB 2.0 Dp/n over a split reference plane; keep a continuous ground reference under those pairs. Avoid routing SuperSpeed pairs near the 1.1 V or 3.3 V switching node - coupling at 5 Gbps is severe. Lastly, populate both AC coupling caps on PCIe TX even if the host slot already includes them, since the TUSB73x0 expects the standard topology.
Información de cumplimiento
RoHS-compliant green/plastic WQFN-100 package per TI product page. Not AEC-Q100 qualified - this is a commercial/industrial-only controller. REACH compliance per TI standard warranty terms.
