Texas Instruments TUSB2043VFR

Overview

TUSB2043VFR from Texas Instruments is a 3.3-V, 4-port USB 1.1 hub IC with integrated transceivers, state-machine architecture (no firmware required), and configurable power management for bus- or self-powered operation. It supports full-speed (12 Mb/s) and low-speed (1.5 Mb/s) downstream devices, includes EEPROM interface for custom VID/PID, and operates in 0°C to 70°C ambient.

For engineers reviewing the TUSB2043VFR datasheet, TUSB2043VFR pinout, TUSB2043VFR application, or TUSB2043VFR equivalent, key selection considerations include USB 1.1 compliance, ganged vs. per-port over-current reporting, 32-pin TQFP package routing, push-pull PWRON outputs eliminating external pullups, and noise-filtered OVRCUR inputs for robust fault detection.

Technical Context

The TUSB2043VFR implements a hardware-based USB hub controller using digital state-machine logic-not a microcontroller-ensuring deterministic timing and zero firmware overhead. All five USB ports (1 upstream + 4 downstream) integrate compliant transceivers with automatic slew-rate adaptation for full-speed and low-speed device attachment.

Power management is configured via BUSPWR (power source mode) and EEDATA/GANGED (ganged/per-port control), enabling four distinct operational modes. The EXTMEM pin enables or disables the 3-wire serial EEPROM interface (EECLK/EEDATA), allowing factory-programmable or default VID/PID descriptors without requiring external configuration logic.

Key Specifications

Pinout & Package

32-pin TQFP (VF package), 0.8 mm pitch, JEDEC MS-026 compliant. Exposed pad not present; thermal dissipation handled via PCB copper area under body.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar USB hub applications.

Compared with TUSB2043VFR, TUSB2040IPV offers identical USB 1.1 functionality but no EEPROM flexibility, while TUSB2140BRHBT upgrades to I²C control and integrated regulation at the cost of pin compatibility and USB 1.1-only timing determinism.

Availability

TUSB2043VFR is available at Aetrix Electronics and suitable for desktop peripheral hubs, industrial USB expansion modules, medical data acquisition dongles, and point-of-sale terminal hubs requiring stable component supply across long-lifecycle production programs.

Supply support for TUSB2043VFR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor company specializing in analog, embedded processing, and connectivity solutions, with decades of leadership in USB interface ICs and industrial-grade mixed-signal design.

The TUSB2043VFR belongs to TI's USB 1.1 hub product line, engineered for cost-sensitive, firmware-free USB expansion in commercial and industrial equipment where deterministic timing and minimal BOM count are critical.

FAQ

Does the TUSB2043VFR support USB 2.0 High-Speed (480 Mb/s) operation?

No, the TUSB2043VFR is strictly compliant with USB Specification 1.1 and supports only full-speed (12 Mb/s) and low-speed (1.5 Mb/s) signaling. It does not implement the high-speed chirp handshake or differential impedance requirements of USB 2.0. For high-speed applications, TI recommends the TUSB2046 or TUSB2140 families, which are not pin-compatible with the TUSB2043VFR.

What is the function of the MODESLCT pin on the TUSB2043VFR?

The MODESLCT pin on the TUSB2043VFR configures the device's operational mode using an RC time constant. When pulled high through a resistor and capacitor to VCC, it ensures proper initialization into normal USB hub operation. Incorrect MODESLCT timing can cause enumeration failure or unstable suspend/resume behavior. The recommended RC values are specified in the TUSB2043VFR datasheet Figure 10.

Can the TUSB2043VFR operate without an external 48-MHz clock source?

No, the TUSB2043VFR requires a precise 48-MHz clock applied to the CLKIN pin for USB frame timing and bit-stuffing compliance. This clock must be provided by an external crystal oscillator or clock generator - the device contains no internal PLL or frequency synthesizer. Omitting or misrouting CLKIN will prevent USB enumeration and cause continuous bus resets.

How does the TUSB2043VFR handle over-current detection in ganged mode?

In ganged mode (EEDATA/GANGED = high), the TUSB2043VFR treats all four OVRCUR inputs as logically OR'd: activation of any single OVRCUR pin pulls all PWRON outputs low, disabling power to all four downstream ports simultaneously. This simplifies external power switch design but sacrifices per-port fault isolation - a key trade-off versus per-port mode.

Is the TUSB2043VFR RoHS-compliant and lead-free?

Yes, the TUSB2043VFR (VF package) is manufactured in accordance with RoHS Directive 2011/65/EU and is lead-free. The device uses matte tin lead finish and meets JEDEC J-STD-020 moisture sensitivity level (MSL) 3 requirements. Full compliance documentation, including substance declarations and test reports, is available from Texas Instruments' official product page for TUSB2043VFR.