TUSB2040APT - 4-Port USB 1.0 Hub Controller | Texas Instruments
MPN: TUSB2040APT ✗ End of LifeTUSB2040APT Overview
A USB hub controller is an interface integrated circuit that expands one upstream USB connection into multiple downstream ports. In the USB interface hierarchy, the TUSB2040APT sits between a host controller and connected peripherals, adding port management, shared-bus coordination, and optional configuration-memory support. It is designed for legacy USB 1.0 equipment rather than current USB 2.0, USB 3.x, or Type-C ecosystems.
The principal feature is four downstream ports in one controller. This allows several USB peripherals to share an available host USB port while the hub manages downstream traffic. The optional serial EEPROM interface provides a path for hub descriptors and configuration data, which can be important when the host must identify the hub correctly. The controller operates from a 3.3 V CMOS supply.
The 48-pin PQFP package exposes separate USB data and clock connections for the upstream interface and downstream ports, together with power, configuration, enable, and interrupt-related functions. Because this is a legacy USB 1.0 hub implementation, system design should verify signal routing, termination, bus capacitance, enumeration behavior, and downstream-current requirements against the manufacturer datasheet rather than assuming compatibility with newer USB standards.
Typical uses include industrial data-acquisition equipment, legacy test systems, embedded service interfaces, printer or peripheral interfaces, and older computer peripherals that require a multiport USB hub. The device is most appropriate when the existing system already uses USB 1.0 and its electrical and enumeration behavior has been validated.
Designers should preserve the recommended placement and connection of USB differential pairs, minimize stubs between the controller and connectors, and route high-current supply paths independently from sensitive data signals. Confirm the pin assignment and power requirements in the Texas Instruments manufacturer datasheet before finalizing the PCB because the available product summary does not reproduce the complete pin table.
This page organizes the manufacturer device description, package information, sourcing fields, interface applications, and engineering considerations into one focused reference. It also distinguishes what the part actually supports—four-port USB 1.0 hub control with optional EEPROM—from newer hub controllers that require different electrical and firmware support.
Drop-in alternatives for TUSB2040APT — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with TUSB2040APT (same form factor and footprint) — differing in Package, Product Type.
TUSB2040N
✅ Drop-InContact for price
View Datasheet →TUSB2040APT Specifications
| Product Type | 4-port USB hub controller |
| Supported USB Specification | USB 1.0 |
| Downstream Port Count | 4 ports |
| Upstream Port Count | 1 port |
| Supply Voltage | 3.3 V |
| Process Technology | CMOS |
| Serial EEPROM Interface | Optional |
| USB Speed Support | Low-speed and full-speed |
| Package | 48-pin PQFP |
| Mounting Type | Surface mount |
| Datasheet Length | 17 pages |
TUSB2040APT 48-pin pqfp Pin Configuration Guide
Pin configuration for TUSB2040APT (48-pin pqfp package). Pin numbering, functions, and connection diagrams are defined in the manufacturer datasheet. Refer to it for the exact footprint and soldering guidelines.
No detailed pinout data available for TUSB2040APT.
Refer to the datasheet for full pin configuration.
Typical Applications
TUSB2040APT is suitable for 6 applications: Legacy Industrial Data Acquisition, Embedded Test and Measurement, Legacy Computer Peripheral Hub, Embedded Printer Interface, Industrial Service Interface, Low-Speed Sensor Network Gateway.
Legacy Industrial Data Acquisition
The TUSB2040APT fits industrial acquisition equipment that already operates a USB 1.0 host interface and needs to attach several low-speed or full-speed peripherals. Its four downstream ports reduce the number of host-controller channels required, while the optional serial EEPROM can retain hub descriptors for enumeration. The 3.3 V CMOS supply and 48-pin PQFP package suit established embedded motherboard designs. Before release, verify the operating-temperature rating, downstream-current budget, ESD requirements, and isolation strategy against the enclosure and cabling environment.
Recommended
Embedded Test and Measurement
The TUSB2040APT is appropriate for legacy test equipment in which a Windows-compatible host provides one USB connection but several instruments require peripheral ports. Because the controller supports USB 1.0 low-speed and full-speed operation, it can serve older serial, parallel, or control instruments that lack high-speed USB interfaces. The optional EEPROM path allows configuration data to be stored separately from the controller. Validate device enumeration, driver compatibility, cable length, and grounding in the complete instrument setup before production use.
Recommended
Legacy Computer Peripheral Hub
The TUSB2040APT can expand one legacy USB 1.0 host port into four downstream connections for keyboards, mice, printers, service interfaces, and other low-bandwidth peripherals. Its four-port topology reduces connector demands on older host boards without introducing a high-speed USB 2.0 hub in the signal path. The optional serial EEPROM interface is useful when a stable hub identity is required by host software. Board-level validation should cover power distribution, hot-plug behavior, enumeration timing, and host-driver support.
Recommended
Embedded Printer Interface
The TUSB2040APT suits a legacy embedded printer platform that exposes one upstream USB connection and needs additional downstream ports for status devices, readers, or service interfaces. USB 1.0 full-speed operation is appropriate for many control and transaction-based peripherals that do not require high-speed throughput. The optional serial EEPROM can store descriptor information, helping the host identify the hub correctly. Confirm printer driver compatibility, cable shielding, surge protection, and port-power requirements during system integration.
Recommended
Industrial Service Interface
The TUSB2040APT can serve as the USB connectivity hub in a legacy industrial service panel that must expose several configuration, diagnostic, or update ports to a service laptop. A single upstream USB 1.0 connection simplifies the service connector while the four downstream ports support multiple low-speed accessories. Its optional EEPROM interface allows portable configuration data and device descriptors. Engineers should validate hot-plug behavior, cable-length margins, ESD protection, grounding, and administrative access controls before field deployment.
Recommended
Low-Speed Sensor Network Gateway
The TUSB2040APT is suitable for a legacy gateway that gathers data from several USB 1.0 low-speed sensors or configuration modules. Four downstream ports allow the controller to multiplex multiple device connections behind one upstream host link, and the optional serial EEPROM provides nonvolatile hub configuration storage. Because the interface is not USB 2.0 high-speed, it should be selected only where the sensors operate at full-speed or low-speed and their bandwidth fits the shared USB 1.0 budget. Validate enumeration, cable topology, and sensor timing.
Recommended
Recommended Products Summary
Engineering reference data for TUSB2040APT — comparison, design guidance, and compliance information.
Selection Guide
Consider the TUSB2040 as the closest same-family alternative when its exact manufacturer pin table and electrical characteristics satisfy the target board. Because the available cross-reference information does not establish every pin-level difference, review both datasheets before approving it as a drop-in replacement. Do not select a newer USB 2.0 or USB 3.x controller as a direct substitute without accepting a PCB, power, firmware, and host-compatibility redesign. For new USB 1.0 products, validate port-power budgeting, hot-plug behavior, ESD protection, cable routing, and enumeration on the final system.
Comparison with Alternatives
| Parameter | This Product | TUSB2040 |
|---|---|---|
| Brand | Texas Instruments | Texas Instruments |
| Package | PQFP-48 | PQFP-48 |
| Device Function | Four-port USB hub controller | Four-port USB hub controller |
| Supported USB Specification | USB 1.0 | USB 1.0 |
| Downstream Port Count | 4 ports | 4 ports |
| Supply Voltage | 3.3 V | 3.3 V |
| Process Technology | CMOS | CMOS |
| Serial EEPROM Interface | Optional | Optional |
| USB Speed Support | Low-speed and full-speed | Low-speed and full-speed |
Key Differentiators
- Four downstream ports with USB 1.0 low-speed and full-speed operation (vs TUSB2040)
- Optional serial EEPROM configuration path (vs TUSB2040)
- Established 48-pin PQFP integration path (vs TUSB2040)
Design Notes
Route each USB differential pair as a short, impedance-controlled pair with continuous reference-plane support and avoid test pads or unnecessary stubs between the TUSB2040APT and external connectors. Keep connector shells and chassis-ground structures near the board edge. Confirm the manufacturer pin table before assigning D+, D-, clock, configuration, and interrupt nets, particularly because an incorrect USB pair connection can prevent enumeration even when the hub controller itself is operating.
Budget downstream-port power separately from the controller's 3.3 V supply requirements. The available manufacturer description confirms a 3.3 V CMOS controller but does not state the maximum aggregate downstream current, so use the datasheet limits rather than estimating from the four port count. Provide local bypass capacitance at the supply pins, distribute connector power through appropriately sized copper, and account for inrush and hot-plug loads at each downstream port.
Do not substitute a four-port USB 2.0 or USB 3.x hub solely because it has four ports. The TUSB2040APT targets USB 1.0 low-speed and full-speed operation, and newer controllers may differ in pinout, voltage, clocking, enumeration, and power requirements. For a drop-in review, compare the 48-pin assignment, serial EEPROM interface, configuration pins, electrical limits, and host compatibility of the exact ordering code before releasing a PCB change.
Validate USB signal integrity with the final connector, cable, hub-board geometry, and downstream-device population rather than relying only on schematic review. Check rise and fall times, branch topology, idle-state behavior, and termination recommendations in the manufacturer application information. Maintain suitable separation from switching-regulator high-current paths and noisy digital clocking to reduce common-mode noise on D+ and D-.
Compliance Information
Compliance declarations were not identified in the product information. The IEC 60947-7-4 certification noted by the manufacturer datasheet applies to a different product and is not applicable to TUSB2040APT.
