TUSB2040AN - 4-Port USB 1.0 Hub Controller | Texas Instruments
料号： TUSB2040AN ✗ 停产TUSB2040AN 概述
A USB hub controller is a semiconductor that manages a shared USB connection and distributes it among multiple downstream peripherals. It sits between a USB host and attached devices, supporting device attachment, enumeration, and port routing. The TUSB2040A device family was designed for USB 1.0 systems in which up to four downstream ports are required and an optional serial EEPROM can provide configuration or hub-specific information.
The principal verified characteristics of the TUSB2040AN are its four downstream ports, 3.3 V CMOS operation, USB 1.0 support, optional serial EEPROM interface, and 28-pin PDIP package. Its parallel host-side data and control paths are intended for conventional low-speed and full-speed Universal Serial Bus designs. The integrated hub function reduces the number of separate discrete interface components required around a host port.
The TUSB2040A architecture includes separate downstream differential data connections for the four hub ports and an upstream connection to the USB host. Configuration information can optionally be supplied through a serial EEPROM, allowing a board designer to support application-specific hub behavior without relying entirely on fixed internal configuration. Exact electrical limits, timing values, and operating-temperature data must be taken from the manufacturer datasheet.
Typical uses include legacy USB keyboards, mice, printers, industrial data-acquisition equipment, educational laboratory computers, and embedded host systems that need to expand one host connection into four downstream ports. A prototype can also be used to verify USB enumeration, peripheral attachment, and power-management behavior before the PCB layout is released.
PCB design should preserve short USB differential traces, continuous ground references, controlled impedance, and proper separation from noisy switching nodes. The optional serial EEPROM interface requires stable address, clock, and data routing, while unused inputs and outputs must follow the manufacturer’s termination and connection guidance. Because the verified search results do not provide a complete pin table or detailed application circuit, those items should be confirmed against the manufacturer documentation before layout.
This product record combines the verified distributor and datasheet-search information with structured engineering guidance. It also explicitly identifies unavailable pricing, lifecycle, pinout, and substitution data instead of presenting unverified substitutions as drop-in alternatives.
直接替换替代料： TUSB2040AN ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
该产品暂无直接替换替代料。
请求替代料TUSB2040AN 规格参数
| Device Type | 4-port USB hub controller |
| Number of Downstream Ports | 4 ports |
| 电源电压 | 3.3 V |
| Logic Technology | CMOS |
| USB Specification Support | USB 1.0 |
| Configuration Interface | Optional serial EEPROM interface |
| Package Type | 28-pin PDIP |
| 引脚数量 | 28 pins |
| 安装类型 | Through-hole |
TUSB2040AN 28-pin pdip 引脚配置指南
TUSB2040AN（28-pin pdip 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： TUSB2040AN.
请参阅 数据手册 以查看完整引脚配置。
典型应用
TUSB2040AN 适用于 6 应用s: Legacy USB Peripheral Hub, Industrial Data-Acquisition System, Educational Computer USB Expansion, USB Keyboard and Mouse Adapter, Legacy Printer and Storage Hub, Embedded Control-System USB Interface.
Legacy USB Peripheral Hub
The TUSB2040AN is suitable for a legacy four-port USB hub because it provides up to four downstream ports in a 3.3 V CMOS controller compatible with USB specification version 1.0. It can sit between an upstream host connection and keyboards, mice, printers, or other compatible peripherals. The optional serial EEPROM interface provides a path for external configuration, although the address method and data format must be confirmed in the manufacturer documentation. Designers should preserve short USB differential routes, provide a continuous ground reference, and verify all current limits, port-routing behavior, and timing parameters against the LLS288B datasheet before production.
推荐
Industrial Data-Acquisition System
The TUSB2040AN can organize several USB 1.0 data-acquisition peripherals behind one upstream host connection in an industrial or laboratory system. Its four downstream ports reduce the number of external host ports required while its 3.3 V CMOS interface aligns with the voltage level stated in the manufacturer datasheet. The controller is best suited to legacy equipment that does not require USB 2.0 throughput or newer bus-powered charging rules. Engineers must account for cable length, ground integrity, electrostatic protection, and device-specific power requirements, none of which are quantified in the supplied search excerpts.
推荐
Educational Computer USB Expansion
The TUSB2040AN can expand a legacy educational computer or laboratory workstation that provides one upstream USB 1.0 connection. Up to four downstream ports can support input devices, storage, printers, or measurement peripherals while keeping the host-side interface consolidated in one controller. Its 28-pin PDIP package is practical for through-hole prototypes and systems assembled for repair or teaching. The optional serial EEPROM can be incorporated when repeatable board-specific configuration is needed. Before release, engineers should confirm signal timing, port-power behavior, connector standards, and the exact package pin assignments in the manufacturer documentation.
推荐
USB Keyboard and Mouse Adapter
The TUSB2040AN is applicable to a legacy USB 1.0 adapter that presents several human-interface-device connections to a host. A single upstream interface can feed up to four downstream ports, while the 3.3 V CMOS controller operates from the voltage level identified in the Texas Instruments LLS288B datasheet. Such an adapter can be useful for embedded systems that expose legacy keyboard and mouse connectors. The design must preserve USB signal integrity, provide correct connector polarity, and separate port-supply current from logic-supply current. Exact enumeration, attachment, and removal behavior should be verified from the manufacturer datasheet and tested with the intended peripherals.
推荐
Legacy Printer and Storage Hub
The TUSB2040AN can support a USB 1.0 printer or storage hub assembly that needs multiple downstream connections from a legacy host. Four downstream ports allow separate peripheral connections to be consolidated without adopting a newer and faster bus controller. The 28-pin PDIP package also simplifies through-hole prototyping where manual assembly and repair are priorities. Because USB 1.0 operation does not imply modern high-speed or charging support, the adapter must use compatible cables and peripherals and must not be assumed to negotiate USB 2.0 speeds. Validate bus-powered and self-powered device arrangements against the manufacturer electrical specifications before layout.
推荐
Embedded Control-System USB Interface
The TUSB2040AN can serve as the legacy USB interface in an embedded control system that requires up to four downstream USB 1.0 peripherals. Its 3.3 V CMOS operation, optional serial EEPROM interface, and dedicated hub-controller role allow a host processor to manage several attached devices through one upstream connection. The implementation should include careful decoupling, continuous ground planes, controlled-impedance differential routing, and protection appropriate to the external connector environment. Since the supplied excerpts do not establish operating-temperature limits, output timing, or absolute maximum ratings, those constraints must be confirmed from LLS288B before the controller is used in a deployed industrial or medical enclosure.
推荐
工程参考数据： TUSB2040AN ——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 |
|---|---|
| Brand | Texas Instruments |
| Package | 28-pin PDIP |
| Device Function | 4-port USB hub controller |
| Downstream Ports | 4 ports |
| Supply Voltage | 3.3 V |
| Logic Technology | CMOS |
| USB Specification | USB 1.0 |
| Configuration Interface | Optional serial EEPROM interface |
| Mounting Type | Through-hole |
关键差异点
- Four downstream ports in one controller （对比 No verified drop-in alternative was identified in the supplied web data)
- Optional serial EEPROM configuration path （对比 No verified drop-in alternative was identified in the supplied web data)
- Through-hole implementation in a 28-pin PDIP （对比 No verified drop-in alternative was identified in the supplied web data)
设计说明
Route the upstream and downstream USB differential pairs as controlled-impedance nets over a continuous ground plane. Keep the TUSB2040AN close to connector or protection-device placement, minimize stubs and unnecessary vias, and avoid routing USB signals alongside switching-node traces. The supplied data does not provide a reference PCB layout or a complete pinout, so engineers must follow the pin arrangement, trace guidance, and placement requirements shown in the manufacturer documentation.
Design the 3.3 V supply for the controller separately from downstream USB port-current requirements. Verify the device’s input and output current limits, supply tolerance, and port-power behavior in the manufacturer datasheet before setting regulator capacity. Place local bypass capacitors at the supply pins and keep return-current paths short. Because no verified power-consumption numbers were supplied, the power tree should not be finalized from the 3.3 V operating voltage alone.
Do not treat this USB 1.0 hub controller as a USB 2.0 or USB 3.x device, and do not assume modern bus-powered charging behavior. A substitute must match the 28-pin PDIP land pattern, pin-to-pin signal assignments, four-port architecture, 3.3 V electrical limits, and USB 1.0 timing before it can be considered a drop-in replacement. Validate the optional serial EEPROM address and data format against LLS288B instead of inferring them from another hub controller.
Apply connector-side ESD and surge protection appropriate to the exposed peripheral environment, and confirm that protection-device capacitance does not degrade USB signal integrity. Keep protection devices close to the connector and maintain a low-impedance connection to chassis or board ground according to the system’s EMC strategy. The verified excerpts do not provide the controller’s ESD rating or a reference protection circuit, so both must be established from manufacturer and application documentation.
合规信息
The supplied verified web results do not state RoHS, REACH, AEC-Q100, lead-free, halogen-free, or conflict-minerals status. These fields remain unknown rather than being inferred from the manufacturer or package.