Texas Instruments TUSB2046BIVFRG4

Overview

TUSB2046BIVFRG4 from Texas Instruments is a 3.3-V, 4-port USB 2.0 full-speed hub IC with integrated transceivers, state-machine architecture (no firmware required), 32-pin LQFP package, and support for both bus-powered and self-powered configurations. It enables scalable peripheral connectivity in embedded host systems such as docking stations and industrial USB hubs.

For engineers reviewing the TUSB2046BIVFRG4 datasheet, TUSB2046BIVFRG4 pinout, TUSB2046BIVFRG4 application, or TUSB2046BIVFRG4 equivalent, key selection criteria include its ganged/per-port overcurrent management, 6-MHz crystal–based low-EMI clocking, push-pull PWRON outputs eliminating external pullups, and EEPROM-programmable VID/PID for custom device enumeration.

Technical Context

The TUSB2046BIVFRG4 implements a hardware-based USB hub controller using a digital state machine-not a microcontroller-ensuring deterministic timing and zero firmware dependency. It integrates fully compliant USB 1.1 transceivers on all five ports (1 upstream + 4 downstream), with automatic slew-rate adaptation for both full-speed (12 Mbps) and low-speed (1.5 Mbps) downstream devices.

Power management is configurable via BUSPWR and EEDATA/GANGED pins to support four operational modes: bus-powered ganged, bus-powered per-port, self-powered ganged, and self-powered per-port. Clocking flexibility includes either a 6-MHz fundamental crystal (XTAL1/XTAL2) with internal PLL generating 48 MHz and 12 MHz, or direct 48-MHz clock injection via TSTPLL/48MCLK when TSTMODE = high.

Key Specifications

Pinout & Package

Package: 32-pin LQFP (7.0 mm × 7.0 mm, JEDEC S-PQFP-G), 0.8-mm terminal pitch, exposed thermal pad not present (VQFN variant has pad; LQFP does not).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TUSB2046I, the TUSB2046BIVFRG4 trades extended temperature capability for lower unit cost and qualification effort in commercial applications; compared with USB2422, it delivers superior power control simplicity and lower system-level EMI at the expense of high-speed bandwidth.

Availability

TUSB2046BIVFRG4 is available at Aetrix Electronics and suitable for desktop docking stations, industrial USB hub modules, and monitor-integrated peripheral hubs requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.

Supply support for TUSB2046BIVFRG4 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 leader specializing in analog, embedded processing, and connectivity solutions, with over 50 years of innovation in interface and power management ICs.

The TUSB2046x product line was designed specifically for cost-effective, firmware-free USB 1.1 full-speed hub applications in commercial computing, industrial equipment, and consumer electronics where reliability, low EMI, and simple integration are critical.

FAQ

What USB speed modes does the TUSB2046BIVFRG4 support?

The TUSB2046BIVFRG4 supports full-speed (12 Mbps) and low-speed (1.5 Mbps) USB 1.1 operation on all four downstream ports. It does not support USB 2.0 high-speed (480 Mbps). Each downstream port automatically detects and adapts slew rate based on attached device speed, ensuring compliance without software intervention. The TUSB2046BIVFRG4 upstream port connects to a full-speed host controller.

Does the TUSB2046BIVFRG4 require external firmware or microcode?

No, the TUSB2046BIVFRG4 uses a dedicated digital state-machine architecture-not a programmable microcontroller-so no firmware, flash memory, or bootloader is needed. All USB protocol handling, enumeration, and packet routing are implemented in hardwired logic. This eliminates firmware validation, reduces startup time, and ensures deterministic behavior across temperature and voltage variations for the TUSB2046BIVFRG4.

Can the TUSB2046BIVFRG4 operate with a 48-MHz clock source instead of a crystal?

Yes, the TUSB2046BIVFRG4 supports direct 48-MHz clock injection via the TSTPLL/48MCLK pin when TSTMODE is held high. In this mode, the internal oscillator and PLL are bypassed, XTAL1 must be tied to VCC, and XTAL2 left floating. This option avoids crystal layout constraints but forfeits the low-EMI advantage of the 6-MHz crystal solution used by the TUSB2046BIVFRG4 in standard operation.

How does overcurrent protection work on the TUSB2046BIVFRG4?

The TUSB2046BIVFRG4 provides configurable overcurrent detection via four OVRCURx inputs (active-low, noise-filtered). When EEDATA/GANGED = high, all ports are ganged: any single OVRCUR assertion forces all PWRON outputs low. When EEDATA/GANGED = low, each OVRCURx controls its corresponding PWRONx independently. External power switches (e.g., TPS2044) must be used to physically disconnect 5-V power per the TUSB2046BIVFRG4's control signals.

Is the TUSB2046BIVFRG4 pin-compatible with the older TUSB2040 hub?

Yes, the TUSB2046BIVFRG4 is a functional and pin-compatible replacement for the TUSB2040, sharing identical LQFP-32 pinout, power sequencing, and registerless operation. Key improvements include lower cost, enhanced ESD performance (±4000 V HBM), push-pull PWRON outputs, and noise-filtered OVRCUR inputs-all while maintaining full backward compatibility for existing TUSB2040 designs upgrading to the TUSB2046BIVFRG4.