Specifications
| Type | Description |
|---|---|
| Part Number | TUSB2046 |
| 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 |
| Component Type | Other |
| USB Compliance | Fully compliant with USB specification as a full-speed hub; condition: TI TID #30220231 |
| Upstream Ports | 1; condition: USB root/upstream port using DP0 and DM0 |
| Downstream Ports | 4; condition: Downstream ports DP1-DP4 and DM1-DM4 |
| Downstream Port Speed Support | Full-speed and low-speed; condition: all downstream ports, slew rate set automatically according to attached device speed |
| ASIC Logic Supply | 3.3 V; condition: low-power CMOS/ASIC logic |
| Firmware Requirement | No firmware programming required; condition: digital state machine implementation instead of microcontroller |
| Integrated Transceivers | USB transceivers integrated; condition: for all upstream and downstream ports |
| Power Source Modes | Self-powered mode; bus-powered mode; condition: selected by BUSPWR pin |
| Power Switching and Overcurrent Modes | Ganged or per-port; condition: configured by GANGED input |
| EEPROM Support | Programmable vendor ID and product ID with external serial EEPROM; condition: EEPROM interface enabled when EXTMEM is low |
| EEPROM Interface | 3-state EEPROM interface allows EEPROM sharing; condition: EECLK and EEDATA pins used when EXTMEM is low |
| PWRON Output Type | Active-low push-pull outputs; condition: PWRON1-PWRON4, eliminates external pullup resistors |
| OVRCUR Noise Filtering | Noise filtering provided; condition: OVRCUR inputs provide immunity to voltage spikes |
| Clock Input Options | 6 MHz crystal input or 48 MHz input clock; condition: selected using TSTMODE/TSTPLL/48MCLK configuration |
| Package Option | 32-pin LQFP, 0.8 mm terminal pitch; condition: JEDEC descriptor S-PQFP-G |
| Package Option | 32-pin VQFN, 0.5 mm pin pitch; condition: RHB package with thermal pad |
| VQFN Body Size | 5.00 mm x 5.00 mm; condition: TUSB2046B/TUSB2046BI package option |
| LQFP Body Size | 7.00 mm x 7.00 mm; condition: TUSB2046I package option |
| Clock Selection Logic | TSTMODE low selects internal APLL; TSTMODE high selects TSTPLL/48MCLK input; condition: 6-MHz or 48-MHz clock operation |
| 6-MHz Crystal Function | Internal PLL generates 48-MHz and 12-MHz clocks; condition: using XTAL1/XTAL2 with 6-MHz crystal input |
| Low-Power Suspend Clock Requirement | Passive crystal or resonator required; condition: if low-power suspend and resume are desired |
| Oscillator Input Limit | TTL output must not exceed 3.6 V; condition: 6-MHz oscillator connected to XTAL1 with XTAL2 open |
| 48-MHz Clock Source Restriction | 48-MHz clock cannot be generated with crystal using XTAL2 output; condition: internal oscillator cell supports only fundamental frequency |
| BUSPWR Pin Function | Active-high power source indicator; condition: high = bus-powered mode, low = self-powered mode, must not change dynamically |
| BUSPWR Pin Number | 8; condition: input pin |
| DP0 Pin Function | Root port USB differential data plus; condition: paired with DM0 as upstream USB port |
| DM0 Pin Function | Root port USB differential data minus; condition: paired with DP0 as upstream USB port |
| EECLK Pin Function | 3-state serial clock output to EEPROM; condition: EXTMEM low, 100-uA internal pulldown, disabled and floating when EXTMEM high |
| EEDATA/GANGED Pin Function | EEPROM serial data or ganged/per-port power-management mode indicator; condition: EXTMEM high selects power/overcurrent mode, EXTMEM low selects EEPROM serial data I/O with 100-uA pulldown |
| EXTMEM Pin Function | External memory interface enable; condition: high disables serial EEPROM interface, low configures pins 5 and 6 as EEPROM clock/data |
| OVRCUR Input Polarity | Active low; condition: OVRCUR1-OVRCUR4 overcurrent inputs |
| PWRON Drive Voltage Limitation | Cannot drive 5-V signals; condition: external power switches must operate with 3.3-V inputs |
| RESET Pin Function | Active-low TTL input with hysteresis; condition: must be asserted at power-up, initializes all logic |
| Recommended Reset Pulse Width | 100 us to 1 ms; condition: after 3.3-V VCC reaches 90%, clock active during last 60 us of reset window |
| SUSPND Output Polarity | Active high; condition: high during suspend mode, low during normal operation |
| XTAL1 Function | 6-MHz crystal input with 50% duty cycle; condition: internal PLL generates 48-MHz and 12-MHz clocks used internally |
| XTAL2 Function | 6-MHz crystal output; condition: must be left open when using an oscillator |
| Absolute Maximum Supply Voltage | -0.5 to 3.6 V; condition: over operating free-air temperature range, voltage with respect to GND |
| Absolute Maximum Input Voltage Range | -0.5 to VCC + 0.5 V; condition: over operating free-air temperature range |
| Absolute Maximum Output Voltage Range | -0.5 to VCC + 0.5 V; condition: over operating free-air temperature range |
| 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 HBM | +/-4000 V; condition: human-body model, ANSI/ESDA/JEDEC JS-001 |
| ESD Rating CDM | +/-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 to VCC V; condition: recommended operating condition |
| Single-Ended Receiver Low-Level Input Voltage | 0.8 V max; condition: recommended operating condition |
| TTL/LVCMOS High-Level Input Voltage | 2 V to VCC V; condition: recommended operating condition |
| TTL/LVCMOS Low-Level Input Voltage | 0 to 0.8 V; condition: recommended operating condition |
| External Differential Driver Series Resistor | 22 ohm -5% to 22 ohm +5%; condition: recommended operating condition |
| Full-Speed Differential Driver Operating Rate | 12 Mb/s; condition: DC differential driver high-speed/full-speed mode |
| Low-Speed Differential Driver Operating 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: recommended operating condition |
| 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 Texas Instruments TUSB2046 is a 4-port USB full-speed hub for Signal_Chain designs requiring one upstream USB connection and four downstream USB ports. The upstream root port uses DP0 and DM0, while the downstream ports use DP1-DP4 and DM1-DM4. Downstream operation supports both full-speed and low-speed devices, with slew rate set automatically according to the attached device speed.
The device is built around 3.3 V low-power CMOS/ASIC logic and uses a digital state machine, so no firmware programming is required. USB transceivers are integrated for all upstream and downstream ports. Power configuration is selected through BUSPWR for self-powered or bus-powered mode, while GANGED configures ganged or per-port power switching and overcurrent operation.
Clocking can use a 6 MHz crystal input, where the internal PLL generates 48 MHz and 12 MHz clocks, or a 48 MHz input clock selected through TSTMODE/TSTPLL/48MCLK configuration. Package options include a 32-pin LQFP with 0.8 mm terminal pitch and 7.00 mm x 7.00 mm body, and a 32-pin VQFN with 0.5 mm pitch, thermal pad, and 5.00 mm x 5.00 mm body.
Key Features
- Fully compliant USB full-speed hub, TI TID #30220231
- One upstream root port using DP0 and DM0
- Four downstream ports using DP1-DP4 and DM1-DM4
- Supports full-speed and low-speed downstream USB devices
- Integrated USB transceivers for upstream and downstream ports
- No firmware programming required for hub operation
- Self-powered or bus-powered mode selected by BUSPWR
- Ganged or per-port power management configured by GANGED
- External EEPROM supports programmable vendor and product IDs
- 6 MHz crystal input or 48 MHz input clock
- Active-low PWRON push-pull outputs for four ports
- Active-low OVRCUR inputs include noise filtering
Typical Applications
- Four-port USB hub designs
- Bus-powered USB hub assemblies
- Self-powered USB hub assemblies
- Full-speed USB expansion ports
- Low-speed USB peripheral aggregation
- EEPROM-configured USB hub products
- Per-port power-managed USB hubs
- Ganged power-switched USB hubs
Procurement Notes
When requesting a quote for TUSB2046, 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 TUSB2046 provide?
The TUSB2046 provides one upstream USB root port using DP0 and DM0, plus four downstream ports using DP1-DP4 and DM1-DM4. The downstream ports support both full-speed and low-speed USB devices.
Does the TUSB2046 require firmware programming?
No firmware programming is required. The device implements hub operation with a digital state machine instead of a microcontroller, while integrating USB transceivers for all upstream and downstream ports.
What clock sources can be used with the TUSB2046?
The TUSB2046 supports a 6 MHz crystal input or a 48 MHz input clock. With a 6 MHz crystal on XTAL1 and XTAL2, the internal PLL generates the 48 MHz and 12 MHz clocks used internally.
Which power source modes are supported by TUSB2046?
The device supports self-powered and bus-powered modes selected by the BUSPWR pin. BUSPWR is an active-high power source indicator, where high selects bus-powered mode and low selects self-powered mode.
What package options are specified for TUSB2046?
Package options include a 32-pin LQFP with 0.8 mm terminal pitch and 7.00 mm x 7.00 mm body, and a 32-pin VQFN with 0.5 mm pin pitch, thermal pad, and 5.00 mm x 5.00 mm body.
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.