TUSB2046BVFR - 4-Port USB 2.0 Full-Speed Hub | TI
料号： TUSB2046BVFR ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $3.42 | $3.42 |
| 10 | $3.08 | $30.80 |
| 100 | $2.68 | $268.00 |
| 500 | $2.36 | $1,180.00 |
| 1,000 | $2.11 | $2,110.00 |
TUSB2046BVFR 概述
A USB hub controller is a dedicated interface IC that expands a single USB upstream connection into multiple downstream ports, handling enumeration, transaction translation at the protocol level, and per-port power management. Within the system hierarchy it sits in the connectivity layer: interface IC > USB controller > hub controller, alongside host controllers and device controllers in a complete USB subsystem.
Key features include full compliance with the USB specification as a full-speed hub (TI design TID #30220231), integrated USB transceivers that eliminate external PHY components, and an optional serial EEPROM interface for storing customized VID/PID and configuration data. Support for Win95/DOS-style operation and a pure hardware state-machine architecture reduce firmware complexity to zero - the hub enumerates automatically on plug-in.
The TUSB2046B is fabricated on a low-power 3.3 V ASIC CMOS process. Because there is no embedded microcontroller, no firmware development, flash programming, or in-circuit emulator is required, which shortens qualification cycles and removes a whole class of field-update failure modes. The device supports individual downstream port power switching and overcurrent status inputs for compliant bus-powered and self-powered hub designs.
Typical applications include standalone USB hubs, monitor and keyboard-display hubs, industrial and medical equipment USB expansion, and adding USB ports to embedded systems built around host processors without native hub capability.
For design, provide 0.1 uF decoupling at each supply pin, strap configuration pins (or fit the optional EEPROM) for power-mode selection, and size port power switches per downstream port load.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found in the manufacturer datasheet.
直接替换替代料： TUSB2046BVFR ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
本系列中的变体
可与以下型号直接替换的同系列型号： TUSB2046BVFR （相同外形与封装尺寸） ——差异在于 Data Rate, USB Standard, Function, Package, Supply Voltage.
快速对比工具——选择替代料号进行并排对比：
TUSB2046BIVFR
✅ 直接替换📋 参考替代料（不在目录中）
TUSB2046BVFRG4
✅ 直接替换✓ 有现货
联系询价
查看数据手册 →TUSB2046BVF
✅ 直接替换📋 参考替代料（不在目录中）
TUSB2046IBVF
✅ 直接替换📋 参考替代料（不在目录中）
TUSB2036VFR
✅ 直接替换✓ 有现货
$2.48 / 个
查看数据手册 →TUSB2046BVFR 规格参数
| 功能 | 4-port USB full-speed hub controller |
| USB Standard | USB 2.0 (full-speed) |
| 数据速率 | 12 Mbps |
| Upstream Ports | 1 |
| Downstream Ports | 4 |
| 电源电压 | 3.0 V to 3.6 V |
| 电源电流 | 40 mA (typical) |
| 工作温度 | 0 C to 70 C |
| Technology | CMOS ASIC (state-machine, no CPU core) |
| Integrated Transceivers | Yes |
| Serial EEPROM Interface | Optional (for VID/PID customization) |
| 封装 | 32-LQFP (VF), 7x7 mm, 0.8 mm pin pitch |
| 安装类型 | Surface Mount |
| Pins | 32 |
| USB Compliance | USB full-speed hub (TI TID #30220231) |
| OS Support | Windows 95/DOS mode supported |
TUSB2046BVFR 32-lqfp (vf), 7x7 mm, 0.8 mm pin pitch 引脚配置指南
TUSB2046BVFR（32-lqfp (vf), 7x7 mm, 0.8 mm pin pitch 封装）的引脚配置。 引脚编号、功能和连接图在制造商数据手册中定义。请参阅该手册以了解确切的封装尺寸和焊接指南。
暂无详细引脚数据： TUSB2046BVFR.
请参阅 数据手册 以查看完整引脚配置。
典型应用
TUSB2046BVFR 适用于 6 应用s: Standalone USB Hubs, Monitor and Display Hub Integration, Industrial Equipment USB Expansion, Medical Device Peripheral Connectivity, Keyboard and Keyboard-Display Hubs, Embedded Systems with Host Processors.
Standalone USB Hubs
The TUSB2046BVFR is purpose-built for standalone multi-port USB hubs: four downstream ports at 12 Mbps full-speed from a single chip with integrated transceivers, so no external PHY or MCU is needed. Its state-machine architecture enumerates automatically when attached, meeting USB full-speed hub compliance (TI TID #30220231) without any firmware certification effort. Designers typically pair it with per-port power switches and the overcurrent status inputs to build bus-powered or self-powered hubs meeting USB power specifications. The 40 mA controller consumption leaves ample power budget for downstream devices in bus-powered configurations, and the optional EEPROM enables OEM VID/PID branding for retail hub products.
推荐
Monitor and Display Hub Integration
Modern monitors embed USB hubs so users can connect keyboards, mice, and storage to a single display cable. The TUSB2046BVFR fits this role with its 3.3 V low-power operation (40 mA) that coexists with a monitor's standby power design, and its 12 Mbps full-speed ports that cover the typical HID and flash-drive workload of monitor hub applications. Because the device requires zero firmware, monitor manufacturers avoid hub firmware maintenance across product generations. The 32-pin LQFP (7x7 mm) footprint is compact enough for integration on the main scaler board, and individual downstream power-switch control outputs allow per-port overcurrent compliance required by USB certification for monitor hubs.
推荐
Industrial Equipment USB Expansion
Industrial HMIs, data loggers, and test instruments frequently need to add several USB device ports for service access or peripheral attachment. The TUSB2046BVFR expands one host port into four without firmware, an important property in industrial systems where software changes demand requalification. Its 0 C to 70 C rating covers indoor control cabinets; for extended -40 C to +85 C environments, designers substitute the pin-compatible TUSB2046BIVFR on the same PCB. The state-machine core introduces no firmware attack surface, an advantage for equipment with long service lifetimes. Per-port overcurrent inputs interface directly with hot-swap power switches to keep the design compliant with USB port power rules in field-deployed hardware.
推荐
Medical Device Peripheral Connectivity
Medical monitors and diagnostic terminals use USB hubs to attach printers, barcode scanners, and data-export drives. The TUSB2046BVFR suits these platforms because its fully hardware state-machine implementation is deterministic - no firmware version variance across units - simplifying regulatory documentation for connectivity subsystems. The 12 Mbps full-speed data rate is sufficient for the peripheral classes used in medical carts, and the 3.0 V to 3.6 V supply integrates cleanly with low-power system rails. Its optional EEPROM allows OEM identification per device family, and the 32-LQFP surface-mount package supports the compact, fanless enclosures typical of medical equipment. Indoor operating environments match the 0 C to 70 C rating.
推荐
Keyboard and Keyboard-Display Hubs
Premium keyboards and keyboard-video combos frequently include a built-in USB hub so users can plug mice or headsets directly into the keyboard body. The TUSB2046BVFR is well matched here: 40 mA controller draw is negligible in bus-powered keyboard designs, its full-speed 12 Mbps ports handle HID devices and headsets, and Win95/DOS mode support ensures enumeration even on legacy BIOS environments where keyboard hubs are most commonly used. The state-machine design enumerates the hub before any OS driver loads, guaranteeing downstream port availability at boot for USB keyboards attached through the hub - a practical benefit of the fixed-function architecture in boot-critical topologies.
推荐
Embedded Systems with Host Processors
Embedded Linux or MCU-based systems whose host controller exposes only one USB port can multiply connectivity using the TUSB2046BVFR behind the host. This is common in set-top boxes, POS terminals, and gateways needing several peripherals (storage, printers, HID) from a single host controller port. The hub requires no host-side firmware beyond the standard OS hub class driver, and its 12 Mbps full-speed operation matches the bandwidth needs of those device classes. The 3.3 V supply aligns with typical embedded I/O rails, and the 7x7 mm LQFP fits dense boards. designers should budget per-port power switches and verify that the host controller supports downstream hub enumeration, which all standard USB host stacks do.
推荐
推荐产品汇总
工程参考数据： TUSB2046BVFR ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | TUSB2046BIVFR | TUSB2046BVFRG4 | TUSB2046BVF | TUSB2036VFR |
|---|---|---|---|---|---|
| Package | 32-LQFP (VF), 7x7 mm | 32-LQFP (VF) - same | 32-LQFP (VF) - same | 32-LQFP (VF) - same | 32-LQFP - same family |
| 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 | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V | 3.0 V to 3.6 V |
| Architecture | State machine (no CPU, no firmware) | State machine (no CPU, no firmware) | State machine (no CPU, no firmware) | State machine (no CPU, no firmware) | State machine (no CPU, no firmware) |
关键差异点
- Wider temperature operation available in same footprint （对比 TUSB2046BIVFR)
- Maximum port count in the TUSB20xx full-speed hub family （对比 TUSB2036VFR)
- Zero-firmware state-machine architecture （对比 MCU-based hub solutions)
设计说明
The TUSB2046BVFR draws approximately 40 mA from a 3.0 V to 3.6 V rail. Decouple each VDD pin with a 0.1 uF ceramic capacitor placed within 2 mm of the pin, plus one bulk 4.7 uF to 10 uF capacitor per device. In bus-powered hub designs, the total power budget (controller plus four downstream ports) must fit within the 500 mA upstream allocation - use per-port power switches such as the TPS2051B to enforce port limits and route their fault outputs to the hub overcurrent status inputs for USB-compliant fault reporting.
Route the USB D+/D- pairs as 90-ohm differential pairs with matched lengths; keep pair-to-pair spacing high and avoid running them parallel to switching regulator nodes. Because the device is a full-speed hub (12 Mbps), signal-integrity margins are generous, but a solid ground plane under the pairs still matters for passing USB eye compliance. The 32-LQFP has no exposed pad - connect the thermal pad area to ground plane with thermal vias for EMC performance rather than thermals.
Three recurring mistakes with the TUSB2046B: (1) leaving the EEPROM interface strapped incorrectly, causing the hub to read garbage VID/PID data at enumeration - tie EEPROM pins per datasheet defaults when no EEPROM is fitted; (2) omitting overcurrent monitoring on self-powered designs, which fails USB compliance testing; (3) selecting the commercial VFR grade for enclosures exceeding 70 C - choose the pin-identical TUSB2046BIVFR (-40 C to +85 C) instead rather than derating. Verify strap pin configurations at power-up against the datasheet configuration table before release.
合规信息
VFR suffix denotes RoHS-compliant lead-free LQFP package per TI ordering nomenclature. REACH and halogen status should be confirmed via TI product page environmental certificates.
