TUSB2046BVFRG4 - 4-Port USB 2.0 Full-Speed Hub | Texas Instruments
MPN： TUSB2046BVFRG4 ✗ 停產TUSB2046BVFRG4 概覽
A USB hub controller is an interface IC that expands a single upstream USB port into multiple downstream ports, handling enumeration, transaction translation at the protocol level, and port power management. It sits within the USB device hierarchy between the host controller and downstream peripherals, forming a sub-family of the broader USB interface and connectivity IC class within semiconductor interface products.
Key features include one upstream port and four downstream ports compliant with the USB 2.0 specification at full speed (12 Mbps), support for both low-speed (1.5 Mbps) and full-speed downstream devices, an optional serial EEPROM interface for storing vendor ID / product ID configuration data, and overcurrent detection inputs with power-switch control outputs for per-port or ganged power switching. Implementation with a digital state machine instead of an embedded microcontroller eliminates firmware development and reduces BOM complexity.
Technical depth: because the TUSB2046B is a pure hardware state-machine design, enumeration latency is deterministic and there is no firmware to qualify, update, or corrupt. The 3.3 V CMOS core with integrated 3.3 V regulator support keeps external components minimal, typically requiring only a 6 MHz or 48 MHz clock source, bypass capacitors, and the external power switches for downstream VBUS.
Typical applications include PC monitor hubs, docking stations, industrial panel USB expansion, printer and multifunction peripheral front panels, and embedded systems requiring additional USB ports from a single host connection. The 12 Mbps full-speed rating suits HID devices, flash drives, and instrumentation rather than high-bandwidth video or mass-storage arrays.
Design consideration: budget downstream VBUS power carefully - each downstream port may supply up to 500 mA at 5 V per the USB specification, so external power MOSFET switches and overcurrent sensing resistors must be sized for the aggregate load, and the OVERCURRENT inputs must be wired to the correct power-switch pins.
This page synthesizes distributor pricing context, drop-in alternatives, lifecycle status, and practical design notes not found in the manufacturer datasheet alone.
直接替換替代品，適用於 TUSB2046BVFRG4 — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
此系列的變體
與下列產品可直接替換的同系列型號： TUSB2046BVFRG4 （相同外形與佔位） — 差異在於 Data Rate, USB Standard, Function, Package, Supply Voltage.
TUSB2046IBVFR
✅ 直接替換📋 參考替代品（不在目錄中）
TUSB2046BVF
✅ 直接替換📋 參考替代品（不在目錄中）
TUSB2046BVFR
✅ 直接替換聯絡詢價
查看資料表 →TUSB2036VFR
✅ 直接替換聯絡詢價
查看資料表 →TUSB2046BVFRG4 規格
| 功能 | USB hub controller |
| USB Standard | USB 2.0 (full-speed hub) |
| 資料速率 | 12 Mbps (full-speed); supports 1.5 Mbps low-speed downstream |
| Number of Upstream Ports | 1 |
| Number of Downstream Ports | 4 |
| 供應電壓 | 3.3 V |
| Protocol | USB |
| EEPROM Interface | Optional serial EEPROM for VID/PID configuration |
| Architecture | Digital state machine (no microcontroller/firmware) |
| 工作溫度 | 0C to +70C |
| 封裝 | 32-LQFP (7x7 mm) |
| 安裝類型 | Surface Mount |
| Overcurrent Protection Inputs | Yes (per-port/ganged overcurrent detect) |
| Power Switch Control | Yes (PWRON outputs for external switches) |
| RoHS 狀態 | Compliant (G4 / Pb-free suffix) |
| 生命週期狀態 | Discontinued at Digi-Key |
TUSB2046BVFRG4 32-lqfp (7x7 mm) 腳位配置指南
TUSB2046BVFRG4（32-lqfp (7x7 mm) 封裝）的腳位配置。 腳位編號、功能與連接圖定義於製造商資料手冊中。請參閱該手冊以取得確切的封裝尺寸與焊接指引。
無詳細腳位定義資料： TUSB2046BVFRG4.
請參閱 資料表 以查看完整腳位配置。
典型應用
TUSB2046BVFRG4 適用於 6 應用s: Monitor and Docking Station USB Hubs, Industrial Panel and HMI USB Expansion, Printer and Multifunction Peripheral Front Panels, Embedded Instrumentation and Test Equipment, Set-Top Box and Consumer Electronics Host Expansion, Medical Device Peripheral Connectivity.
Monitor and Docking Station USB Hubs
Standalone and monitor-integrated USB hubs are the classic application for the TUSB2046BVFRG4. Its four full-speed downstream ports natively expand a single host connection for keyboards, mice, flash drives, and other peripherals, while the state-machine architecture ensures deterministic enumeration without firmware. Per-port or ganged power switching is implemented with external P-channel MOSFETs driven by the PWRON outputs, with the OVERCURRENT inputs providing USB-specification-compliant fault reporting. The 12 Mbps full-speed rating matches the bandwidth needs of typical desktop peripherals, and the 3.3 V supply integrates cleanly with monitor and dock power trees. Because the part is EOL, long-lifetime docking products should qualify the TUSB2046IBVFR drop-in variant for continued supply.
推薦
Industrial Panel and HMI USB Expansion
Industrial human-machine interface panels often need two to four USB ports for keyboards, barcode scanners, and USB flash drives used for recipe or log storage. The TUSB2046BVFRG4 fits because its 3.3 V CMOS core draws little power inside enclosed panels, and its hardware-only operation eliminates firmware maintenance across long service lifetimes. For panels exposed to wider ambient temperatures, the pin-compatible TUSB2046IBVFR with -40C to +85C range is the correct choice on the same PCB. Designers should route the OVERCURRENT inputs from the power-switch sense resistors and keep the 12 Mbps D+/D- pairs as short, matched 90-ohm differential traces to pass USB eye-mask requirements within the noisy industrial EMC environment.
推薦
Printer and Multifunction Peripheral Front Panels
Office printers and multifunction peripherals expose front-panel USB ports for direct flash-drive printing, which requires exactly the function the TUSB2046BVFRG4 provides: a full-speed hub that enumerates mass-storage devices on the 12 Mbps bus. The optional serial EEPROM interface lets OEMs program their own vendor ID and product ID so the hub enumerates under the printer brand, a common branding requirement in this market. The 32-LQFP (7x7 mm) package fits the constrained PCB area behind control panels, and the digital state-machine design avoids firmware bugs that could brick the front panel in the field. Overcurrent inputs protect the host and panel wiring against damaged consumer flash drives.
推薦
Embedded Instrumentation and Test Equipment
Bench instruments, data loggers, and test fixtures frequently require a USB port for a memory stick to export CSV logs, plus a second port for a keyboard during local operation. The TUSB2046BVFRG4 supplies four downstream ports from one host connection, letting instrument designers reserve ports for future accessories. Its 12 Mbps full-speed operation is fully adequate for configuration files and low-rate measurement exports, while the no-firmware architecture shortens safety and functional qualification cycles - there is no hub firmware to re-validate after a change. The 0C to +70C commercial range suits benchtop environments; lab-grade portable instruments operating outdoors should instead use the industrial-range TUSB2046IBVFR variant on the identical footprint.
推薦
Set-Top Box and Consumer Electronics Host Expansion
Consumer set-top boxes, digital photo frames, and TV companion boards historically used the TUSB2046BVFRG4 to add front and rear USB ports from a single SoC host controller. The hub's low-speed (1.5 Mbps) downstream support is essential here for IR receivers and remote-control dongles that are still low-speed HID devices, while full-speed ports handle flash drives. Its 3.3 V supply matches typical consumer board rails, and the state-machine core avoids boot-time firmware loading that would slow perceived power-on. The commercial 0C to +70C rating aligns with consumer environmental specifications. Designers should budget each downstream port for 500 mA VBUS capability per the USB specification when using bus-powered configurations.
推薦
Medical Device Peripheral Connectivity
Non-invasive medical devices such as patient-data terminals, pharmacy printers, and clinical monitors use USB hubs to connect keyboards, barcode scanners for patient ID, and flash drives for data export. The TUSB2046BVFRG4 suits these roles because its hardware-only state machine provides deterministic, firmware-free behavior that simplifies design-history documentation, and its low 3.3 V power draw suits battery-backed and standby-power designs. Enclosed medical devices with wider environmental requirements should adopt the TUSB2046IBVFR industrial variant, which is pin-to-pin identical. Note this commercial-grade hub is not itself qualified for patient-connected or safety-critical circuits; it should terminate only externally attached, isolated peripherals on the non-patient-facing side of the system.
推薦
推薦產品摘要
工程參考資料，適用於 TUSB2046BVFRG4 — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | TUSB2046IBVFR | TUSB2046BVF | TUSB2046BVFR | TUSB2036VFR |
|---|---|---|---|---|---|
| Package | 32-LQFP (7x7 mm) | 32-LQFP (7x7 mm) - same | 32-LQFP (7x7 mm) - same | 32-LQFP (7x7 mm) - same | 32-LQFP (7x7 mm) - same |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments |
| Downstream Ports | 4 | 4 | 4 | 4 | 3 |
| Data Rate | 12 Mbps full-speed | 12 Mbps full-speed | 12 Mbps full-speed | 12 Mbps full-speed | 12 Mbps full-speed |
| Supply Voltage | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V |
| Operating Temperature | 0C to +70C | -40C to +85C | 0C to +70C | 0C to +70C | 0C to +70C |
| EEPROM Interface | Optional serial EEPROM | Optional serial EEPROM | Optional serial EEPROM | Optional serial EEPROM | Optional serial EEPROM |
| Lifecycle Status | Discontinued at Digi-Key (EOL) | EOL / broker stock | EOL / broker stock | EOL / broker stock | EOL / broker stock |
主要差異化特點
- Four downstream ports versus three (對比TUSB2036VFR)
- Industrial temperature option on identical footprint (對比TUSB2046IBVFR)
- Firmware-free hardware state-machine architecture (對比Microcontroller-based third-party hubs)
設計說明
Downstream VBUS must be switched externally: the TUSB2046BVFRG4 provides PWRON control outputs and OVERCURRENT sense inputs but no integrated power switches. Per the USB 2.0 specification, each downstream port may deliver up to 500 mA at 5 V; for a bus-powered four-port hub design, ensure the upstream allocation (typically 500 mA total) is managed with ganged switching or limited per-port budgets. Select a power-distribution switch such as the TPS20xx family whose fault output polarity matches the hub's OVERCURRENT input, and add a 120 uF or larger bulk capacitor per the USB VBUS droop requirements.
Route all five D+/D- pairs (one upstream, four downstream) as 90-ohm differential pairs with matched intra-pair lengths; keep pairs under 10 cm and avoid routing near switching rails or clock lines. The hub operates at 12 Mbps full speed, which is forgiving compared with 480 Mbps high speed, but eye-mask failures still occur when pairs cross plane splits. For the EEPROM interface, keep EEDATA/EECLK short; if the EEPROM is unpopulated, leave the pins per the datasheet strap recommendations so default descriptors are used.
Three recurring pitfalls: (1) Assuming high-speed (480 Mbps) support - this hub is full-speed only at 12 Mbps; high-speed devices will enumerate at reduced speed downstream. (2) Ignoring lifecycle - the part is discontinued at Digi-Key as of 2026; new designs should adopt the TUSB2046IBVFR drop-in or a current TI hub solution, and sustaining designs should perform a last-time-buy. (3) Temperature mismatch - the BVFRG4 is rated 0C to +70C only; using it in industrial enclosures causes marginal timing at temperature extremes, so switch to the identical-footprint industrial variant instead.
合規資訊
G4 suffix denotes TI Pb-free/green packaging flow per TI ordering nomenclature. REACH, halogen-free, and conflict-minerals declarations should be confirmed via the TI quality portal for the specific lot.
