Specifications
| Type | Description |
|---|---|
| Part Number | TUSB2046B |
| Manufacturer | Texas Instruments |
| Product Type | Operational Amplifier |
| Category | Signal Chain |
| Package / Case | 32-pin LQFP, 7.00 mm x 7.00 mm; 32-pin VQFN, 5.00 mm x 5.00 mm |
| USB Compliance | Fully compliant full-speed hub; condition: USB specification |
| Upstream Ports | 1; condition: Root USB port DP0/DM0 |
| Downstream Ports | 4; condition: DP1-DP4 and DM1-DM4 |
| Downstream Port Speed Support | Full-speed and low-speed; condition: all downstream ports |
| ASIC Logic Supply | 3.3 V; condition: CMOS hub device |
| Firmware Requirement | No firmware programming required; condition: digital state machine implementation |
| Power Source Modes | Self-powered mode; bus-powered mode; condition: selected by BUSPWR input |
| Power Switching Mode | Ganged or per-port; condition: configured by GANGED input |
| External EEPROM Support | Programmable vendor ID and product ID; condition: external serial EEPROM interface |
| Clock Source Options | 6 MHz crystal input or 48 MHz input clock; condition: TSTMODE selects clock source |
| Absolute Maximum Supply Voltage | -0.5 to 3.6 V; condition: over operating free-air temperature range |
| Absolute Maximum Input Voltage Range | -0.5 to VCC + 0.5 V; condition: with respect to GND |
| Absolute Maximum Output Voltage Range | -0.5 to VCC + 0.5 V; condition: with respect to GND |
| Input Clamp Current | ±20 mA; condition: VI < 0 V or VI < VCC |
| Output Clamp Current | ±20 mA; condition: VO < 0 V or VO < VCC |
| Operating Free-Air Temperature | 0 to 70 °C; condition: TUSB2046B |
| Operating Free-Air Temperature | -40 to 85 °C; condition: TUSB2046BI, TUSB2046I |
| Storage Temperature Range | -65 to 150 °C; condition: absolute maximum rating |
| ESD Rating | ±4000 V; condition: human body model, ANSI/ESDA/JEDEC JS-001 |
| ESD Rating | ±1500 V; condition: charged-device model, JEDEC JESD22-C101 |
| Recommended Supply Voltage | 3.0 V min, 3.3 V nom, 3.6 V max; condition: TUSB2046B |
| Recommended Supply Voltage | 3.3 V min, 3.6 V max; condition: TUSB2046BI, TUSB2046I |
| TTL/LVCMOS Input Voltage | 0 to VCC V; condition: recommended operating condition |
| TTL/LVCMOS Output Voltage | 0 to VCC V; condition: recommended operating condition |
| Single-Ended Receiver High-Level Input Voltage | 2 V min to VCC max; condition: VIH(REC) |
| Single-Ended Receiver Low-Level Input Voltage | 0.8 V max; condition: VIL(REC) |
| TTL/LVCMOS High-Level Input Voltage | 2 V min to VCC max; condition: VIH(TTL) |
| TTL/LVCMOS Low-Level Input Voltage | 0 to 0.8 V; condition: VIL(TTL) |
| External Series Differential Driver Resistor | 22 Ω ±5%; condition: R(DRV) |
| Full-Speed Operating Data Rate | 12 Mb/s; condition: DC differential driver high-speed mode |
| Low-Speed Operating Data Rate | 1.5 Mb/s; condition: DC differential driver low-speed mode |
| Differential Receiver Common-Mode Input Range | 0.8 to 2.5 V; condition: VICR |
| TTL/LVCMOS Input Transition Time | 0 to 25 ns; condition: recommended operating condition |
| Junction Temperature Range | -40 to 115 °C; condition: recommended operating condition |
| Datasheet Status | request_only |
Product Overview
The TUSB2046B is a Texas Instruments USB 4-port hub controller for Signal_Chain designs requiring one upstream root USB port and four downstream DP/DM port pairs. It is described as a fully compliant full-speed hub under the USB specification, with downstream ports supporting both 12 Mb/s full-speed and 1.5 Mb/s low-speed operation.
The device is a 3.3 V CMOS hub implemented with a digital state machine, eliminating firmware programming requirements. System configuration is handled through hardware inputs, including BUSPWR for self-powered or bus-powered mode, GANGED for ganged or per-port power switching, and TSTMODE for selecting a 6 MHz crystal input or 48 MHz input clock.
Package options include a 32-pin LQFP measuring 7.00 mm x 7.00 mm and a 32-pin VQFN measuring 5.00 mm x 5.00 mm. Electrical limits include a recommended 3.0 V to 3.6 V supply range for TUSB2046B, 0 to 70 °C operating free-air temperature, 22 Ω ±5% external series differential driver resistors, and specified HBM/CDM ESD ratings.
Key Features
- Fully compliant USB full-speed hub controller
- One upstream root USB DP0/DM0 port
- Four downstream DP/DM port pairs
- Downstream ports support full-speed and low-speed operation
- 3.3 V CMOS hub logic supply
- No firmware programming required
- Self-powered and bus-powered modes via BUSPWR
- Ganged or per-port switching via GANGED
- External EEPROM supports programmable vendor and product IDs
- 6 MHz crystal or 48 MHz input clock
Typical Applications
- USB full-speed hub designs
- Four-port downstream USB expansion
- Bus-powered USB hub equipment
- Self-powered USB hub equipment
- Low-speed USB peripheral aggregation
- EEPROM-configurable USB product identification
Procurement Notes
When requesting a quote for TUSB2046B, buyers should confirm the manufacturer, package or case, required quantity, target date code, compliance documents, packing method, destination country and expected delivery schedule.
If alternatives are acceptable, buyers should share the approved vendor list, required electrical or optical limits, package constraints and qualification requirements. Any alternative part should be reviewed by the buyer's engineering team before production use.
For analog and signal-chain sourcing, supply voltage, bandwidth, accuracy, noise level, package, temperature grade, input/output configuration and qualification requirements should be verified before approval.
FAQ
How many USB ports does the TUSB2046B support?
The TUSB2046B has one upstream root USB port on DP0/DM0 and four downstream ports on DP1-DP4 and DM1-DM4. All downstream ports support both full-speed and low-speed operation.
Does the TUSB2046B require firmware programming?
No firmware programming is required. The extracted datasheet facts describe the TUSB2046B as using a digital state machine implementation for hub operation.
What clock sources can be used with the TUSB2046B?
The device supports either a 6 MHz crystal input or a 48 MHz input clock. The TSTMODE input selects the clock source option.
What package options are listed for the TUSB2046B?
The listed package options are a 32-pin LQFP measuring 7.00 mm x 7.00 mm and a 32-pin VQFN measuring 5.00 mm x 5.00 mm.
What power modes are supported by this hub controller?
The TUSB2046B supports self-powered mode and bus-powered mode. The selected mode is controlled by the BUSPWR input, while power switching can be configured as ganged or per-port through GANGED.
Technical Review & Sourcing Note
Prepared by LDeepAI Component Sourcing Team. Reviewed for RFQ, documentation and alternative sourcing use. Last updated: June 30, 2026.
This page is based on manufacturer datasheet information and LDeepAI sourcing review. Specifications should be verified against the official manufacturer datasheet before final procurement or design approval. Final electrical, optical and reliability approval should be confirmed by the buyer's engineering team.