TUSB2040AN

Controllers Overview

The TUSB2040AN is a USB Specification 1.0 compliant hub controller providing four downstream ports in a 28-pin DIP package. It operates on a 3.3-V supply with a range of 3 V to 3.6 V and supports Full-Speed (12 Mbps) and Low-Speed (1.5 Mbps) data rates. The device requires a 48-MHz clock signal via XTAL1/XTAL2 terminals. It features configurable power source modes (bus-powered or self-powered) and overcurrent reporting options (ganged or per-port). An optional serial EEPROM interface allows for programmable Vendor ID and Product ID descriptors.

Controllers Feature Summary

• Supports bus-powered and self-powered operation modes with integrated transceivers
• Provides individual or ganged power switching and overcurrent detection for downstream ports
• Enables programmable VID and PID storage through an external serial EEPROM interface
• Maintains pin-to-pin compatibility with the TUSB2040 when EXTMEM is low

Controllers Applications

• Connecting multiple USB peripherals to a host computer root hub
• Implementing self-powered hubs for high-power device support
• Creating bus-powered hubs for low-power peripheral expansion

Controllers Procurement Notes

Verify component authenticity by checking the manufacturer marking against official datasheet specifications. Confirm the package type matches the required 28-pin DIP configuration. Ensure the revision level aligns with design requirements, noting that this specific part number may be obsolete. Validate electrical parameters such as supply voltage and operating temperature against system constraints before integration.

Controllers Selection Notes

Select this component for designs requiring USB 1.0 compliance and simple hub functionality without I2C interfaces. Choose the DIP package for prototyping or applications where surface mount technology is not feasible. Consider the TUSB2040A variant if programmable identifiers are needed, ensuring the EXTMEM pin is configured correctly. Verify that the system can provide the necessary 48-MHz clock signal for proper operation.

Controllers Part Context

The TUSB2040AN belongs to the TUSB2040A family of USB hub controllers from Texas Instruments. It serves as a foundational solution for expanding USB connectivity in legacy systems. The 'N' suffix denotes the plastic dual-in-line package. This device predates USB 2.0 high-speed standards and is intended for full-speed and low-speed applications only.

Controllers Replacement Considerations

Public confirmed substitute part numbers: None identified.