TUSB2070PT

Controllers Overview

The TUSB2070PT is a CMOS Universal Serial Bus hub controller compliant with USB Version 1.0, housed in a 48-pin LQFP package. It provides up to seven downstream ports and supports both bus-powered and self-powered modes. In bus-powered mode, four downstream ports are operational; in self-powered mode, all seven ports function. The device operates at a supply voltage of 3.3 V (range 3 V to 3.6 V) and supports data rates of 12 Mb/s for full-speed and 1.5 Mb/s for low-speed operations. It requires an external 48-MHz clock source.

Controllers Feature Summary

• Supports two power source modes: bus-powered with four active downstream ports and self-powered with seven active downstream ports.
• Provides integrated USB transceivers for the upstream root port and all downstream ports, automatically adjusting slew rates for attached devices.
• Offers configurable power switching and overcurrent reporting capabilities, allowing selection between individual port management or ganged port control.

Controllers Applications

• Expanding USB connectivity on personal computers by connecting multiple peripherals such as printers, keyboards, and mice.
• Creating tiered USB network configurations where hubs connect to other hubs to support extended peripheral arrays.
• Implementing self-powered hub designs for high-power device classes requiring independent local power supplies.

Controllers Procurement Notes

Verify component status before procurement as the TUSB2070PT is listed as obsolete in official documentation. Confirm availability through authorized distributors or secondary markets if production units are required. Review the latest datasheet revisions for any specific handling or compatibility notes relevant to legacy designs.

Controllers Selection Notes

Select this component for applications strictly adhering to USB Version 1.0 specifications. Ensure the design accommodates the requirement for an external 48-MHz oscillator or crystal circuit. Evaluate whether the fixed 3.3-V logic levels meet system interface requirements, as the device does not support higher voltage signaling without level shifting.

Controllers Part Context

The TUSB2070 is part of Texas Instruments' early generation of USB hub controllers designed for USB 1.0 compliance. It serves as a foundational solution for expanding host connections before the introduction of USB 2.0 high-speed standards. Related models include the TUSB2040, which offers a reduced four-port configuration.

Controllers Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. As the device is marked obsolete, engineers should evaluate newer generations of USB hub controllers that support USB 2.0 or later specifications for new designs.