TUSB2077APT - 7-Port USB 2.0 Hub Controller | Texas Instruments
部品番号: TUSB2077APT ✗ 生産終了TUSB2077APT 概要
A USB hub controller is an interface semiconductor that manages one upstream USB connection and multiple downstream ports. In the broader hierarchy, the TUSB2077APT belongs to the USB interface controller class, within interface integrated circuits and general-purpose semiconductor devices. Its seven-port architecture allows several USB peripherals to share one host controller while individual downstream connections can be enabled, disabled, or managed for power and enumeration requirements.
The manufacturer identifies the TUSB2077APT as a seven-port full-speed USB 2.0 hub controller. It supports both bus-powered and self-powered operating modes, which allows the hub to be designed around the power budget of a host device or with a dedicated external supply. The optional serial EEPROM interface provides a path for storing descriptor information rather than relying only on the controller's default descriptor behavior.
The EXTMEM control is connected to pin 47 and determines whether the optional EEPROM interface is enabled. According to the Texas Instruments TUSB2077A product page, driving EXTMEM high enables the optional EEPROM function and causes the vendor and product identifiers to use defaults, including enumeration as a General Purpose USB Hub. This makes EXTMEM an important PCB-level design and firmware-configuration decision.
Typical uses include compact USB expansion products, computer peripherals, docking equipment, industrial control panels, test systems, and embedded systems that need several full-speed USB connections. A design must allocate upstream and downstream signal routing, verify power-source requirements, and configure the hub for either bus-powered or self-powered operation. The optional EEPROM path should be assessed early because its presence or absence affects descriptor customization and board population.
Use the manufacturer pin-description table and package drawing when assigning all 48 pins and laying out the LQFP footprint. The downstream data paths require careful, impedance-conscious routing, while power and ground connections need enough copper area to support the selected operating mode. Designers should also confirm the configuration of EXTMEM at pin 47 and the intended behavior of the optional EEPROM interface.
This product record combines the manufacturer's hub-function details, package and pin-count information, lifecycle information, sourcing context, and a conservative drop-in comparison. It also identifies practical design decisions that are easy to overlook: descriptor customization, EXTMEM configuration, power-mode selection, and validation of every candidate replacement before PCB substitution.
ドロップイン代替品: TUSB2077APT — 同一パッケージでピン互換。PCBの作り直しが必要な異なるパッケージの部品は除外されています。
TUSB2077APTG4
✅ ドロップイン📋 参考代替品（カタログ未掲載）
TUSB2077APTRG4
✅ ドロップイン📋 参考代替品（カタログ未掲載）
TUSB2077APT 仕様
| Product Type | USB hub controller |
| USB Specification | USB 2.0 |
| Maximum Data Rate | 12 Mbps |
| Number of Downstream Ports | 7 ports |
| Serial EEPROM Interface | Optional |
| Operating Mode | Bus-powered or self-powered |
| EXTMEM Pin Position | Pin 47 |
| Package Type | 48-pin LQFP (PT) |
| Package Body Size | 7 mm x 7 mm |
| ピン数 | 48 pins |
| 動作温度範囲 | 0 C to 70 C |
| 実装タイプ | Surface mount |
TUSB2077APT 7 mm x 7 mm ピン配置ガイド
TUSB2077APT (7 mm x 7 mm パッケージ) のピン配置。 ピン番号、機能、接続図はメーカーのデータシートで定義されています。正確なフットプリントとはんだ付けのガイドラインについては、データシートを参照してください。
詳細なピン配置データはありません: TUSB2077APT.
詳細は データシート をご参照ください。
主な用途
TUSB2077APT の用途: 6 件s: Compact USB Docking Station, Industrial Control Panel, Embedded Test and Measurement System, Legacy Computer Peripheral Expansion, USB-to-Serial Adapter Assembly, Benchtop USB Connectivity Hub.
Compact USB Docking Station
The TUSB2077APT fits a docking station that must expose several full-speed USB devices through one upstream host connection. Its seven-port architecture reduces the number of separate hub controllers required for multi-connector equipment, while full-speed operation at 12 Mbps targets keyboards, mice, printers, and other USB 2.0 peripherals that do not require high-speed transfer rates. The design must balance downstream connector count against the hub power budget and use the manufacturer application guidance to select bus-powered or self-powered operation.
おすすめ
Industrial Control Panel
A TUSB2077APT-based control panel can consolidate keyboard, mouse, mass-storage, service-interface, and configuration connections into one upstream USB port. Its seven downstream ports provide useful expansion density where a control enclosure has multiple operator peripherals but limited host interfaces. Because the device operates as a full-speed USB 2.0 hub, the system should use compatible peripherals and apply the manufacturer power-management and enumeration requirements before enabling all downstream loads simultaneously.
おすすめ
Embedded Test and Measurement System
The TUSB2077APT is suitable for a compact test system that exposes service ports, data-acquisition peripherals, storage devices, and configuration interfaces through a single USB host connection. Seven downstream ports reduce cable clutter and simplify enclosure design, while full-speed operation at 12 Mbps is appropriate for control traffic and moderate-speed peripherals. For deterministic measurement operation, the system should assess enumeration timing, power-source behavior, and ground routing before selecting this legacy controller for a new platform.
おすすめ
Legacy Computer Peripheral Expansion
A TUSB2077APT provides a practical way to expand USB connectivity in an established computer or embedded peripheral designed around full-speed USB 2.0. Its seven downstream ports can support keyboards, mice, printers, card readers, and other peripherals without requiring seven separate host connections. Since the device is marked obsolete, engineers should reserve it for maintenance and approved legacy platforms, and qualify an approved replacement before starting a new-volume design.
おすすめ
USB-to-Serial Adapter Assembly
A multi-port USB-to-serial adapter can use the TUSB2077APT to provide several downstream full-speed USB connections from one host port, simplifying a dense interface panel. The controller's optional serial EEPROM interface may be relevant when product-specific descriptors are required, while EXTMEM at pin 47 controls whether that interface is enabled. The adapter still needs separate downstream transceivers or converters, and its power design must account for the combined load presented by all enabled ports.
おすすめ
Benchtop USB Connectivity Hub
The TUSB2077APT can serve as the hub controller in a benchtop instrument that connects several full-speed service devices to a laptop or test computer. Seven ports allow operators to retain access to USB storage, programming interfaces, keyboards, and diagnostic accessories without cycling cables on the host computer. The implementation should follow the manufacturer layout and power recommendations, particularly when multiple downstream ports are active, and should account for the controller's obsolete lifecycle during product planning.
おすすめ
おすすめ製品の概要
エンジニアリング参考データ: TUSB2077APT — 比較、設計ガイダンス、コンプライアンス情報。
選定ガイド
代替品との比較
| パラメータ | この製品 | TUSB2077APTG4 | TUSB2077APTRG4 |
|---|---|---|---|
| Product Type | 7-port USB 2.0 hub controller | 7-port USB 2.0 hub controller | 7-port USB 2.0 hub controller |
| Brand | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 48-LQFP (PT), 7 mm x 7 mm | 48-LQFP, same footprint | 48-LQFP, same footprint |
| Number of Pins | 48 pins | 48 pins | 48 pins |
| Downstream Port Count | 7 ports | 7 ports | 7 ports |
| USB Version | USB 2.0 | USB 2.0 | USB 2.0 |
| Maximum Data Rate | 12 Mbps full-speed | 12 Mbps full-speed | 12 Mbps full-speed |
| Serial EEPROM Interface | Optional | Optional | Optional |
| Operating Mode | Bus-powered or self-powered | Bus-powered or self-powered | Bus-powered or self-powered |
| EXTMEM Pin Position | Pin 47 | Pin 47 | Pin 47 |
主な差別化要因
- Seven-port integration in one controller （vs USB2514BI-AEZG)
- Pin-compatible same-family options （vs TUSB2077APTG4)
- Optional descriptor storage with dedicated control （vs TUSB2077APTRG4)
設計ノート
Select bus-powered or self-powered operation during schematic definition rather than after PCB layout. Bus-powered designs place a strict demand on the host source and downstream load budget, while a self-powered hub requires a suitable external supply and careful power-state sequencing. Confirm the permitted operating mode, port-current limits, and power-distribution requirements in the manufacturer datasheet before sizing magnetics, protection devices, and bulk capacitance.
Use the manufacturer LQFP package drawing and land-pattern guidance for the 48-pin PT footprint. Confirm pad length, row spacing, solder-mask clearance, and courtyard requirements rather than scaling the dimensions from a generic LQFP drawing. Also account for fan-out from the fine-pitch lands, maintain the stated copper and soldering allowances, and verify assembly-handling constraints before releasing the fabrication package.
Do not treat EXTMEM as an ordinary unused configuration point. Pin 47 enables or disables the optional serial EEPROM interface, and a high level causes the vendor and product identifiers to use defaults, including General Purpose USB Hub enumeration. Decide whether custom descriptor storage is required, connect the pin to the intended logic level, and verify the resulting enumeration behavior on the assembled board.
Route each upstream and downstream USB signal as a controlled-impedance differential pair, following the manufacturer's layout guidance and keeping the pair geometry consistent through connectors, vias, and test points. Avoid adding stubs or unnecessary layer transitions, provide a continuous reference plane, and place ESD protection where it will not materially disrupt the signal path. Review the seven-port routing fan-out for crosstalk and enclosure or connector-return-path effects.
The TUSB2077APT is a full-speed controller, not a 480-Mbps high-speed hub. Do not base the design on the phrase USB 2.0 alone: use 12-Mbps full-speed performance when evaluating bandwidth, latency, and compatible peripherals. For new designs requiring high-speed devices, greater port count, or a current product lifecycle, qualify a different controller instead of assuming that this legacy part can be upgraded through PCB changes alone.
コンプライアンス情報
The TUSB2077APT is marked obsolete. Specific RoHS, REACH, lead-free, halogen-free, and conflict-minerals declarations require confirmation from the manufacturer or an authoritative compliance record.
