TUSB2140N - 4-Port USB 2.0 Hub Controller | Texas Instruments
MPN: TUSB2140N ✗ End of Life| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0 | $0.00 |
| 10 | $0 | $0.00 |
| 100 | $0 | $0.00 |
| 500 | $0 | $0.00 |
| 1,000 | $0 | $0.00 |
TUSB2140N Overview
A USB hub controller is an interface IC that manages traffic between one upstream USB host connection and multiple downstream USB ports. Within the product hierarchy, it is a USB interface controller, bus controller, interface IC, and semiconductor. By organizing USB connectivity and exposing configuration functions through a compatible control bus, this type of device reduces the amount of discrete logic required in a multiport USB product.
The TUSB2140N provides four downstream hub ports, operates up to 48 MHz, supports I2C compatibility, and is available in a 40-terminal rectangular DIP package. The verified distributor data classifies it as an industrial-temperature component with through-hole terminals. These characteristics make it relevant to legacy industrial USB hubs, embedded USB expansion equipment, and systems designed around the original TUSB2140 interface rather than newer hub controllers.
Technically, the device combines USB host-interface management and an embedded function in one controller. Its 48 MHz maximum operating frequency supports the clocking requirements associated with this USB 2.0 hub-controller generation, while I2C compatibility offers a practical path to configuration and supervisory control. The 40-pin DIP format favors through-hole assembly and repairability, but it consumes considerably more board area than contemporary surface-mount hub controllers.
Typical applications include industrial USB hubs, embedded test equipment, peripheral aggregation systems, legacy USB expansion cards, and OEM products that retain the TUSB2140 architecture. Because the part is an older through-hole design, engineers should also assess modern surface-mount alternatives or the indicated TUSB2046B successor when new PCB area, sourcing, or lifecycle constraints favor redesign.
The primary design consideration is lifecycle and availability. Verified marketplace data states that TUSB2140N was replaced by TUSB2046B, while current stock and pricing are offered through brokers and distributors. For new production, confirm lifecycle status, exact electrical compatibility, and pin-level equivalence before substituting any successor; a USB hub change can affect enumeration, power management, and downstream-port behavior.
This page consolidates verified distributor specifications, the replacement relationship, source links, and engineering selection guidance. It distinguishes documented TUSB2140N attributes from unavailable parameters, helping procurement and design engineers make a grounded legacy-support or migration decision.
Drop-in alternatives for TUSB2140N — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
TUSB2140BN
✅ Drop-In📋 Reference alternative (not in catalog)
TUSB2140
✅ Drop-In ⚠️ Specs Unverified📋 Reference alternative (not in catalog)
TUSB2140N Specifications
| Product Type | 4-port USB 2.0 hub controller with embedded function |
| Number of USB Ports | 4 ports |
| Maximum Clock Frequency | 48 MHz |
| I2C Compatibility | Compatible |
| Device Classification | Universal Serial Bus bus controller |
| Temperature Grade | Industrial |
| Package Type | 40-PDIP |
| Package Code | DIP |
| Package Shape | Rectangular |
| Mounting Type | Through-hole |
| Number of Terminals | 40 terminals |
| Lead Pitch | 15.24 mm |
| Replacement Part | TUSB2046B |
TUSB2140N rectangular Pin Configuration Guide
Pin configuration for TUSB2140N (rectangular 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 TUSB2140N.
Refer to the datasheet for full pin configuration.
Typical Applications
TUSB2140N is suitable for 6 applications: Legacy industrial USB hubs, USB peripheral aggregation, Embedded USB test equipment, Legacy peripheral expansion cards, USB-to-serial bridging systems, Kiosk and point-of-sale peripherals.
Legacy industrial USB hubs
The TUSB2140N fits legacy industrial USB-hub maintenance because it combines four downstream hub ports with an embedded function in a 40-PDIP industrial-temperature device. Its maximum clock frequency of 48 MHz and I2C compatibility support the control and bus requirements of this controller generation. In an existing installation, retaining the through-hole controller avoids an unnecessary board redesign while preserving four-port expansion. The main trade-off is obsolete lifecycle status: as of 2026-10-23, current stock and pricing are quote- or distributor-dependent, so production teams should document condition, traceability, and delivery assurance.
Recommended
USB peripheral aggregation
The TUSB2140N is suitable for peripheral aggregation when one upstream USB host connection must fan out to four downstream devices. The four-port hub architecture centralizes port routing, while the embedded function adds controller capability without requiring a separate device for that portion of the design. Its 48 MHz maximum clock frequency is the verified timing headline to evaluate against upstream traffic and downstream loads. The 40-PDIP package is mechanically simple to inspect and repair, although it occupies more PCB area than a modern surface-mount hub controller.
Recommended
Embedded USB test equipment
The TUSB2140N can support embedded USB test equipment that needs four downstream connections for peripherals, instruments, or service interfaces. The integrated embedded function reduces controller overhead, and the 48 MHz maximum operating frequency provides a concrete basis for checking the clocking and signal-integrity budget. I2C compatibility is useful when supervisory control must be coordinated with the hub. For new test platforms, engineers should weigh this through-hole controller against TUSB2046B or another current four-port hub because verified lifecycle information indicates that TUSB2140N has already been replaced.
Recommended
Legacy peripheral expansion cards
The TUSB2140N fits expansion cards built around the original TUSB2140 architecture, especially where an existing PCB already routes a 40-PDIP footprint and exposes four USB ports. Through-hole assembly supports manual insertion, rework, and field replacement, while the industrial temperature grade matches the verified product classification. The same migration caveat applies: use TUSB2140N mainly to sustain proven hardware, not to launch a new platform without checking TUSB2046B’s package and pin compatibility. Its 48 MHz clock limit and I2C compatibility should be included in the legacy design’s signal and control verification.
Recommended
USB-to-serial bridging systems
The TUSB2140N can participate in USB-to-serial bridging systems by providing four downstream USB attachment points for one host bus, allowing several serial adapters to share the same upstream connection. Its embedded function supports integration of additional control behavior, while I2C compatibility can coordinate configuration with an external controller. The design must still validate USB enumeration, per-port current limits, ESD strategy, and signal integrity because these values are not available in the retrieved excerpts. The 40-PDIP format favors repairable industrial equipment rather than compact consumer adapters.
Recommended
Kiosk and point-of-sale peripherals
The TUSB2140N is potentially useful in a legacy kiosk or point-of-sale system requiring several USB peripherals behind one host port. Four downstream ports reduce external hub count, and I2C compatibility permits supervisory coordination with equipment that already uses a serial control bus. The industrial-grade classification supports deployment in controlled commercial or industrial environments, but the supplied sources do not provide the numeric temperature range, USB compliance declarations, or power specifications. New kiosk designs should begin with the documented TUSB2046B successor unless retaining the existing 40-PDIP board offers a clear lifecycle advantage.
Recommended
Recommended Products Summary
Engineering reference data for TUSB2140N — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | TUSB2140BN | TUSB2140 |
|---|---|---|---|
| Brand | Texas Instruments | Texas Instruments | Texas Instruments |
| Package | 40-PDIP | 40-PDIP | 40-PDIP |
| Number of USB Ports | 4 ports | 4 ports | 4 ports |
| Mounting Type | Through-hole | Through-hole | Through-hole |
Key Differentiators
- Maintains a straightforward four-port legacy hub design (vs TUSB2046B)
- Same-brand service continuity for existing installations (vs TUSB2140BN)
- Embedded function integrated with four-port hub control (vs TUSB2140)
Design Notes
Do not treat TUSB2046B as a confirmed no-change PCB substitution solely because marketplace data calls it the replacement. Compare the original 40-PDIP pinout, exposed functions, supply voltage, clock source, USB data connections, and embedded-function signals against the TUSB2046B datasheet. A functional migration can still require component changes, revised clocking, different decoupling, or a new board layout.
Validate the complete USB power budget before layout. The supplied excerpts do not provide operating voltage, device supply current, or per-port current limits, so these values must come from the manufacturer datasheet and the downstream USB specification. Include protection, isolation, and port-current budgeting in schematic review; do not infer safe load limits from the four-port description or 48 MHz clock rating.
Route high-speed USB differential pairs as controlled-impedance traces with short returns and continuous reference planes. Keep the 48 MHz-related clock and USB routing away from noisy switching nodes, and verify series termination, connector placement, and ESD-return paths using the device and connector guidance. Because detailed rise-time and impedance data are absent from the verified excerpts, use the full datasheet and USB channel validation rather than general assumptions.
Preserve the original 40-PDIP footprint when maintaining a proven board, but account for through-hole mechanical tolerances, connector access, and inspection requirements. For a new layout, compare the area and assembly cost of this DIP controller with the documented TUSB2046B successor and current surface-mount hub options. Prototype level shifting, clock startup, enumeration, and downstream hot-plug behavior before production release.
Compliance Information
The supplied sources verify industrial temperature grade and the TUSB2046B replacement relationship but provide no explicit RoHS, REACH, lead-free, halogen-free, or conflict-minerals statements. AEC-Q100 is not applicable to this general-purpose USB hub controller based on the verified product positioning.
