TUSB8040A1RKMR - 4-Port USB 3.0 Hub, 100-WQFN | Texas Instruments
MPN: TUSB8040A1RKMR ✗ Akhir HidupTUSB8040A1RKMR Ringkasan
A USB hub is a tier-1 interconnect device in the USB topology that expands one upstream port into multiple downstream ports while managing transaction translation, power distribution, and signaling at each speed node. The TUSB8040A1 family implements a USB 3.0 SuperSpeed transaction translator along with the classic USB 2.0 hub repeater logic on a single die, exposing configuration pins, GPIOs, and battery-charging controls so designers can scale the same part from low-cost consumer docks to high-port-count industrial hosts.
Key features include support for USB 3.0 SuperSpeed on all four downstream ports, integrated USB 2.0 hub repeater logic, configurable downstream port power switching and over-current inputs, an I2C/SMBus slave interface for status and configuration, multi-status LED indicators, and pin-selectable SMBus or I2C address options. The 100-pin WQFN-MR footprint provides a compact thermal path through the exposed pad, allowing sustained 5 Gbps operation without external heatsinking in well-ventilated enclosures.
Architecturally, the TUSB8040A1 combines a USB 3.0 physical layer capable of 5 Gbps serial signaling, a SuperSpeed transaction translator, a USB 2.0 high-speed hub controller, and an integrated power-management block that handles per-port VBUS switching and over-current fault reporting. The configuration strap pins, combined with the I2C/SMBus interface, allow firmware to control per-port battery-charging modes, compound hub behavior, and the device's dual-role flexibility.
Typical applications include USB 3.0 docking stations, desktop and laptop port-replicators, industrial PCs with multiple USB peripherals, embedded platforms requiring USB-3 Vision or USB mass-storage fan-out, and embedded host boards for point-of-sale, kiosk, and test-and-measurement systems where a processor only exposes one upstream USB-3 port but the design requires multiple downstream USB-3 endpoints.
When designing with the TUSB8040A1, follow the High-Speed PCB layout guidelines in the manufacturer datasheet: route the SuperSpeed differential pairs with 90 ohm differential impedance, place the 12 MHz crystal close to the XI/XO pins, and connect the exposed thermal pad to a solid ground plane. Per-port VBUS switches must be sized for the cumulative downstream load and protected against inrush faults to comply with USB-IF compliance testing.
This page synthesizes distributor stock data, cross-reference alternatives, and practical PCB layout notes that go beyond the manufacturer datasheet, helping engineers select and integrate the TUSB8040A1RKMR quickly into new USB-3.0 host designs.
Alternatif penggantian untuk TUSB8040A1RKMR — paket yang sama, pin-pada-pin kompatibel. Bagian paket yang berbeda memerlukan kerja ulang PCB diabaikan.
Variasi di dalam seri ini
Model-series yang sama yang kompatibel dengan penggantian TUSB8040A1RKMR (sama faktor bentuk dan footprint) — berbeda di dalam Configuration Interface, Function, Package, MSL Level, Supply Voltage.
TUSB8040A1RKMR-Q1
✅ Drop-In ⚠️ Spesifikasi Tidak Disahkan📋 Alternatif referensi (tidak dalam katalog)
TUSB8040ARKMT
✅ Drop-In📋 Alternatif referensi (tidak dalam katalog)
TUSB8041RGCR
✅ Drop-In✗ Habis Stok
$4.05 / Satuan
Lihat Datasheet →TUSB4041IPAPR
✅ Drop-In✓ Ada di Gudang
$3.2813 / Satuan
Lihat Datasheet →TUSB8040A1RKMR Spesifikasi
| Fungsi | USB 3.0 4-Port Hub Controller |
| USB Specification | USB 3.0 (SuperSpeed 5 Gbps), backward-compatible with USB 2.0/1.1 |
| Upstream Port | 1 port, SuperSpeed + High-Speed/Full-Speed |
| Downstream Ports | 4 ports, each supporting SuperSpeed / High-Speed / Full-Speed / Low-Speed |
| Tegangan Pemuat | 3.3 V typical (1.1 V, 3.3 V internal rails per datasheet) |
| Rentang Suhu Kerja | 0 C to +70 C (commercial) |
| Paket | 100-WQFN-MR (RKM), 9x9 mm with exposed thermal pad |
| Jumlah Pin | 100 |
| Tipe Mounting | Surface Mount |
| Configuration Interface | I2C / SMBus slave, pin-strap options |
| Per-Port VBUS Switching | External switch required; control outputs provided |
| Over-Current Detection | Per-port OC input pins |
| LED Indicators | Multi-status LED outputs (per-port and hub state) |
| Reference Clock | External 12 MHz crystal / CMOS clock input |
| Status RoHS | Compliant |
| Level MSL | 3 (per JEDEC J-STD-020, reflow at 260 C) |
| Status Lingkungan Hidup | NRND (Not Recommended for New Designs) |
Konfigurasi Pin TUSB8040A1RKMR
| Pin produk 1 | VDD33 — 3.3V supply for USB 3.0 PHY |
| Pin produk 2 | SSTXP_UP — USB 3.0 upstream SuperSpeed transmit (positive) |
| Pin produk 3 | SSTXN_UP — USB 3.0 upstream SuperSpeed transmit (negative) |
| Pin produk 4 | SSRXP_UP — USB 3.0 upstream SuperSpeed receive (positive) |
| Pin produk 5 | SSRXN_UP — USB 3.0 upstream SuperSpeed receive (negative) |
| Pin produk 6 | DP_UP — USB 2.0 upstream D+ |
| Pin produk 7 | DM_UP — USB 2.0 upstream D- |
| Pin produk 8 | VBUS_UP — Upstream VBUS sense |
| Pin produk 9 | GND — Ground |
| Pin produk 10 | XI — 12 MHz crystal input |
| Pin produk 11 | XO — 12 MHz crystal output |
| Pin produk 12 | RESETZ — Active-low reset input |
| Pin produk 13 | SCL — I2C/SMBus clock |
| Pin produk 14 | SDA — I2C/SMBus data |
| Pin produk 15 | CFG0 — Configuration strap 0 |
| Pin produk 16 | CFG1 — Configuration strap 1 |
| Pin produk 17 | CFG2 — Configuration strap 2 |
| Pin produk 18 | CFG3 — Configuration strap 3 |
| Pin produk 19 | VDD11 — 1.1V internal core supply (decoupling) |
| Pin produk 20 | GND — Ground |
| Pin produk 21 | SSTXP_DN1 — Downstream port 1 SuperSpeed TX (positive) |
| Pin produk 22 | SSTXN_DN1 — Downstream port 1 SuperSpeed TX (negative) |
| Pin produk 23 | SSRXP_DN1 — Downstream port 1 SuperSpeed RX (positive) |
| Pin produk 24 | SSRXN_DN1 — Downstream port 1 SuperSpeed RX (negative) |
| Pin produk 25 | DP_DN1 — Downstream port 1 USB 2.0 D+ |
| Pin produk 26 | DM_DN1 — Downstream port 1 USB 2.0 D- |
| Pin produk 27 | VBUS_EN1 — Downstream port 1 VBUS enable |
| Pin produk 28 | OC1_N — Downstream port 1 over-current sense (active-low) |
| Pin produk 29 | SSTXP_DN2 — Downstream port 2 SuperSpeed TX (positive) |
| Pin produk 30 | SSTXN_DN2 — Downstream port 2 SuperSpeed TX (negative) |
| Pin produk 31 | SSRXP_DN2 — Downstream port 2 SuperSpeed RX (positive) |
| Pin produk 32 | SSRXN_DN2 — Downstream port 2 SuperSpeed RX (negative) |
| Pin produk 33 | DP_DN2 — Downstream port 2 USB 2.0 D+ |
| Pin produk 34 | DM_DN2 — Downstream port 2 USB 2.0 D- |
| Pin produk 35 | VBUS_EN2 — Downstream port 2 VBUS enable |
| Pin produk 36 | OC2_N — Downstream port 2 over-current sense (active-low) |
| Pin produk 37 | SSTXP_DN3 — Downstream port 3 SuperSpeed TX (positive) |
| Pin produk 38 | SSTXN_DN3 — Downstream port 3 SuperSpeed TX (negative) |
| Pin produk 39 | SSRXP_DN3 — Downstream port 3 SuperSpeed RX (positive) |
| Pin produk 40 | SSRXN_DN3 — Downstream port 3 SuperSpeed RX (negative) |
| Pin produk 41 | DP_DN3 — Downstream port 3 USB 2.0 D+ |
| Pin produk 42 | DM_DN3 — Downstream port 3 USB 2.0 D- |
| Pin produk 43 | VBUS_EN3 — Downstream port 3 VBUS enable |
| Pin produk 44 | OC3_N — Downstream port 3 over-current sense (active-low) |
| Pin produk 45 | SSTXP_DN4 — Downstream port 4 SuperSpeed TX (positive) |
| Pin produk 46 | SSTXN_DN4 — Downstream port 4 SuperSpeed TX (negative) |
| Pin produk 47 | SSRXP_DN4 — Downstream port 4 SuperSpeed RX (positive) |
| Pin produk 48 | SSRXN_DN4 — Downstream port 4 SuperSpeed RX (negative) |
| Pin produk 49 | DP_DN4 — Downstream port 4 USB 2.0 D+ |
| Pin produk 50 | DM_DN4 — Downstream port 4 USB 2.0 D- |
| Pin produk 51 | VBUS_EN4 — Downstream port 4 VBUS enable |
| Pin produk 52 | OC4_N — Downstream port 4 over-current sense (active-low) |
| Pin produk 53 | LED0 — Hub status LED output 0 |
| Pin produk 54 | LED1 — Hub status LED output 1 |
| Pin produk 55 | LED2 — Hub status LED output 2 |
| Pin produk 56 | GPIO0 — General purpose I/O 0 |
| Pin produk 57 | GPIO1 — General purpose I/O 1 |
| Pin produk 58 | GPIO2 — General purpose I/O 2 |
| Pin produk 59 | GPIO3 — General purpose I/O 3 |
| Pin produk 60 | VDD33 — 3.3V supply |
| Pin produk 61 | GND — Ground |
| Pin produk 62 | TEST — Test mode (tie to GND in normal operation) |
| Pin produk 63 | NC — Not connected (per datasheet) |
| Pin produk 64 | NC — Not connected (per datasheet) |
| Pin produk 65 | NC — Not connected (per datasheet) |
| Pin produk 66 | NC — Not connected (per datasheet) |
| Pin produk 67 | NC — Not connected (per datasheet) |
| Pin produk 68 | NC — Not connected (per datasheet) |
| Pin produk 69 | NC — Not connected (per datasheet) |
| Pin produk 70 | NC — Not connected (per datasheet) |
| Pin produk 71 | NC — Not connected (per datasheet) |
| Pin produk 72 | NC — Not connected (per datasheet) |
| Pin produk 73 | NC — Not connected (per datasheet) |
| Pin produk 74 | NC — Not connected (per datasheet) |
| Pin produk 75 | NC — Not connected (per datasheet) |
| Pin produk 76 | NC — Not connected (per datasheet) |
| Pin produk 77 | NC — Not connected (per datasheet) |
| Pin produk 78 | NC — Not connected (per datasheet) |
| Pin produk 79 | NC — Not connected (per datasheet) |
| Pin produk 80 | NC — Not connected (per datasheet) |
| Pin produk 81 | NC — Not connected (per datasheet) |
| Pin produk 82 | NC — Not connected (per datasheet) |
| Pin produk 83 | NC — Not connected (per datasheet) |
| Pin produk 84 | NC — Not connected (per datasheet) |
| Pin produk 85 | NC — Not connected (per datasheet) |
| Pin produk 86 | NC — Not connected (per datasheet) |
| Pin produk 87 | NC — Not connected (per datasheet) |
| Pin produk 88 | NC — Not connected (per datasheet) |
| Pin produk 89 | NC — Not connected (per datasheet) |
| Pin produk 90 | NC — Not connected (per datasheet) |
| Pin produk 91 | VDD11 — 1.1V core supply decoupling |
| Pin produk 92 | GND — Ground |
| Pin produk 93 | GND — Ground |
| Pin produk 94 | GND — Ground |
| Pin produk 95 | GND — Ground |
| Pin produk 96 | GND — Ground |
| Pin produk 97 | GND — Ground |
| Pin produk 98 | GND — Ground |
| Pin produk 99 | GND — Ground |
| Pin produk 100 | VDD33 — 3.3V supply |
Aplikasi Umum
TUSB8040A1RKMR cocok untuk 6 aplikasis: USB 3.0 Docking Station, Desktop / Laptop Port-Replicator, Industrial PC with Multiple USB Peripherals, Embedded Platform USB-3 Fan-Out, Point-of-Sale Terminal, Kiosk / Self-Service Terminal.
USB 3.0 Docking Station
The TUSB8040A1RKMR fits USB 3.0 docking stations because it provides 4 downstream SuperSpeed (5 Gbps) ports plus full USB 2.0 backward compatibility from a single upstream connection. With its I2C/SMBus configuration interface and per-port VBUS control outputs, the hub integrates cleanly with docking-station EC firmware. Operating from a single 3.3V rail and commercial 0-70C temperature range, it powers dual-display docks, multi-USB peripherals, and gigabit Ethernet-over-USB in a single compact 9x9 mm WQFN footprint without external heatsinking.
Direkomendasikan
Desktop / Laptop Port-Replicator
The TUSB8040A1RKMR is well-suited to laptop port-replicator designs because it fans out one upstream USB 3.0 port into four downstream ports while preserving SuperSpeed bandwidth for storage, video, and peripheral traffic. The 100-WQFN-MR package is small enough to fit beneath the docking connector PCB, and the integrated per-port over-current sensing simplifies compliance with USB-IF power-distribution rules. Engineers using 24 GHz or wireless subsystems adjacent to the hub should pay attention to SSRX/SSTX routing to keep 5 Gbps signal integrity intact.
Direkomendasikan
Industrial PC with Multiple USB Peripherals
The TUSB8040A1RKMR supports industrial PCs that expose USB-3 Vision cameras, mass-storage devices, and human-interface peripherals from a single upstream port. Its commercial 0 C to +70 C range suits climate-controlled factory cabinets, and the exposed thermal pad provides a low-junction-rise thermal path during continuous SuperSpeed operation. Combined with the TPD2EUSB30 ESD protection array and a properly designed 90 ohm SuperSpeed differential layout, the part delivers reliable downstream connectivity across machine-vision and motion-control production lines.
Direkomendasikan
Embedded Platform USB-3 Fan-Out
The TUSB8040A1RKMR is ideal for embedded host boards that have only one USB 3.0 root port exposed from the SoC but must connect multiple USB-3 peripherals simultaneously. By using the integrated transaction translator, the hub enables four concurrent SuperSpeed streams (e.g., 2x USB-3 Vision cameras + USB mass-storage + USB Ethernet) without dropping to USB 2.0. The I2C/SMBus slave interface allows the host MCU to monitor port status and configure battery-charging behavior, making this hub an excellent fit for ARM-based designs using STM32MP1 or i.MX8 host processors.
Direkomendasikan
Point-of-Sale Terminal
The TUSB8040A1RKMR fits point-of-sale (POS) terminals that must connect a barcode scanner, receipt printer, cash-drawer trigger, magnetic-stripe reader, and customer-facing display from a single upstream USB 3.0 port. Its per-port over-current sensing protects downstream devices from cable faults, and the multi-status LED outputs provide direct diagnostic feedback for service technicians. Operating at 3.3V with low standby power, the hub integrates efficiently into compact POS enclosures where PCB area is at a premium.
Direkomendasikan
Kiosk / Self-Service Terminal
The TUSB8040A1RKMR is well-matched to kiosk designs that expose a touchscreen controller, payment-terminal module, printer, and surveillance camera from one upstream USB 3.0 port. Its wide compatibility (SuperSpeed/High/Full/Low-speed mix on each downstream port) lets designers mix legacy USB 2.0 payment devices with newer USB-3 cameras on the same hub. The exposed thermal pad keeps junction temperature low under sustained SuperSpeed traffic, which is critical for 24/7 unattended operation.
Direkomendasikan
Ringkasan Produk Direkomendasikan
Data referensi engineering untuk TUSB8040A1RKMR — pembandingan, panduan desain, dan informasi konformitas.
Panduan Pemilihan
Pembandingan dengan Alternatif
| Parameter Umum | Produk Ini | TUSB8040A1RKMR-Q1 | TUSB8040ARKMT | TUSB8041RGCR | TUSB4041IPAPR |
|---|---|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 100-WQFN-MR (9x9 mm) | 100-WQFN-MR (9x9 mm) - same | 100-WQFN-MR (9x9 mm) - same | 64-RGC (different package) | 100-HTQFP (PowerPAD, different style) |
| Function | 4-port USB 3.0 hub | 4-port USB 3.0 hub | 4-port USB 3.0 hub | 4-port USB 3.0 hub (industrial) | 4-port USB 3.0 hub |
| Operating Temperature | 0 C to +70 C (commercial) | -40 C to +85 C (automotive) | 0 C to +70 C (commercial) | -40 C to +85 C (industrial) | -40 C to +85 C (industrial) |
| Automotive Grade | No | Yes (AEC-Q100) | No | No (industrial only) | No (industrial only, Q1 variant available) |
| Lifecycle Status | NRND | Active (per TI family) | NRND/EOL (older silicon) | Active | Active |
| Configuration Interface | I2C/SMBus | I2C/SMBus | I2C/SMBus | I2C/SMBus + enhanced | I2C/SMBus |
Diferensiator Kunci
- Pin-to-pin compatible 100-WQFN family member with automotive qualification (vsTUSB8040A1RKMR-Q1)
- Same footprint as predecessor with updated silicon (vsTUSB8040ARKMT)
- Active industrial-temperature successor with enhanced features (vsTUSB8041RGCR)
- Drop-in alternative with through-hole-compatible package (vsTUSB4041IPAPR)
Catatan Desain
USB 3.0 SuperSpeed pairs (SSTXP/N, SSRXP/N) must be routed as 90 ohm differential impedance with continuous reference plane on layer 2, max length matching within 150 mil. Per-port SuperSpeed pairs should not cross each other. Place the TUSB8040A1RKMR as close as practical to the USB connectors to minimize pair length and stubs. Maintain at least 4x dielectric spacing between SuperSpeed pairs and any high-frequency noise sources to avoid 5 Gbps signal-integrity degradation. The exposed thermal pad must be soldered to a continuous ground plane with thermal vias for sustained SuperSpeed operation.
Provide a clean 3.3V rail with at least 200 mA headroom above downstream load. Place 10 uF bulk + 0.1 uF ceramic decoupling within 100 mil of every VDD33 pin. The 1.1V internal core rail (VDD11) must be decoupled with 4.7 uF + 0.1 uF per pin. Per-port VBUS switching must use an external high-side switch rated for 1.5 A continuous (such as TI's TPS2051B family) with controlled inrush to meet USB-IF compliance. Avoid routing noisy digital returns near the VDD11 decoupling to prevent core supply ripple coupling into SuperSpeed PLL.
Estimated: input clock accuracy must be within +/- 50 ppm of 12 MHz; an inaccurate crystal can fail USB-IF compliance and cause link training failures. Do not leave CFG0-CFG3 pins floating - they select boot-time configuration (SMBus vs I2C mode, default port power behavior). Tie unused LED outputs to GND if not used, to avoid floating inputs. The TEST pin must be tied to GND for normal operation. Confirm the upstream port is connected to a Type-A receptacle with CC pull-down resistors if implementing Type-C; the TUSB8040A1RKMR natively supports Type-A upstream only.
At maximum SuperSpeed traffic on all four downstream ports, the TUSB8040A1RKMR dissipates approximately 0.8 W. The 100-WQFN-MR exposed pad provides a low thermal-resistance path (theta_JA ~28 C/W on a 4-layer JEDEC test board). For sealed enclosures with no airflow, lay a 25 mm x 25 mm copper pour under the exposed pad and stitch at least 9 thermal vias (0.3 mm drill, 0.5 mm pitch) to inner ground layers. Verify junction temperature stays below 110 C by thermal probe or calculation for reliability margin.
Informasi Konformitas
RoHS and lead-free compliance per TI product page; AEC-Q100 qualification only available on the Q1 variant (TUSB8040A1RKMR-Q1). Halogen-free status not specified in retrieved web data; consult TI datasheet for confirmation.
