Overview
The TUSB2046BVFRG4 is a 4-port hub device designed for the Universal Serial Bus (USB) by Texas Instruments. This device is a 3.3-V CMOS hub that complies with the USB specification as a full-speed hub. It features one upstream port and four downstream ports, all of which support full-speed and low-speed operations. The TUSB2046BVFRG4 is implemented with a digital state machine, eliminating the need for firmware programming. It integrates fully compliant USB transceivers for all ports and automatically adjusts the slew rate based on the speed of the attached devices.
Key Specifications
| Parameter | Min | Max | Unit |
|---|---|---|---|
| VCC Supply Voltage | -0.5 | 3.6 | V |
| Input Voltage Range | -0.5 | VCC + 0.5 | V |
| Output Voltage Range | -0.5 | VCC + 0.5 | V |
| Operating Free-Air Temperature (TUSB2046B) | 0 | 70 | °C |
| Operating Free-Air Temperature (TUSB2046BI, TUSB2046I) | -40 | 85 | °C |
| External Series Differential Driver Resistor | 22 (-5%) | 22 (5%) | Ω |
| Operating (dc differential driver) High Speed Mode | 12 | Mb/s | |
| Operating (dc differential driver) Low Speed Mode | 1.5 | Mb/s | |
| Common Mode, Input Range, Differential Receiver | 0.8 | 2.5 | V |
| Input Transition Times, TTL/LVCMOS | 0 | 25 | ns |
| Junction Temperature Range | -40 | 115 | °C |
| Package Type | VQFN (32), LQFP (32) | ||
| Package Body Size (VQFN) | 5.00 mm × 5.00 mm | ||
| Package Body Size (LQFP) | 7.00 mm × 7.00 mm |
Key Features
- One upstream port and four downstream ports, all supporting full-speed and low-speed operations.
- Implemented with a digital state machine, eliminating the need for firmware programming.
- Integrated fully compliant USB transceivers for all upstream and downstream ports.
- Automatic adjustment of slew rate based on the speed of the attached devices.
- Supports bus-powered and self-powered modes, configurable via the BUSPWR pin.
- Power switching and overcurrent detection modes configurable via the GANGED input.
- Supports suspend and resume operations.
- Programmable Vendor ID and Product ID with external serial EEPROM.
- 3-state EEPROM interface allows EEPROM sharing.
- Push-pull outputs for PWRON eliminate the need for external pullup resistors.
- Noise filtering on OVRCUR provides immunity to voltage spikes.
- Low EMI emission achieved through a 6-MHz crystal input.
- No special driver requirements; works seamlessly with any operating system with USB stack support.
Applications
- Computer Systems
- Docking Stations
Q & A
- What is the TUSB2046BVFRG4?
The TUSB2046BVFRG4 is a 4-port USB hub device designed by Texas Instruments, complying with the USB specification as a full-speed hub.
- How many ports does the TUSB2046BVFRG4 have?
The device has one upstream port and four downstream ports.
- What are the supported speeds for the downstream ports?
The downstream ports support both full-speed and low-speed operations.
- Does the TUSB2046BVFRG4 require firmware programming?
No, it is implemented with a digital state machine, eliminating the need for firmware programming.
- What are the power management modes supported by the TUSB2046BVFRG4?
The device supports both bus-powered and self-powered modes, with options for individual-port or ganged-port power management.
- How is the clock source selected for the TUSB2046BVFRG4?
The clock source is selected via the TSTMODE pin, allowing for either a 6-MHz crystal input or a 48-MHz on-the-board clock source.
- What is the significance of the GANGED input?
The GANGED input determines whether the power switching and overcurrent detection operate on a per-port basis or collectively for all ports.
- Does the TUSB2046BVFRG4 require special drivers?
No, it works seamlessly with any operating system that has USB stack support, requiring no special drivers.
- What are the package options for the TUSB2046BVFRG4?
The device is available in VQFN (32) and LQFP (32) packages.
- What are the typical applications for the TUSB2046BVFRG4?
The device is commonly used in computer systems and docking stations.
