Features: ` Universal Serial Bus (USB) Version 1.0 Compliant` Integrated USB Transceivers` Four Downstream Ports` Two Power Source Modes Self-Powered Mode Bus-Powered Mode` Power Switching and Overcurrent Reporting is Provided Ganged or Per Port` All Downstream Ports Support Full-Speed and Low-Spe...
TUSB2040A: Features: ` Universal Serial Bus (USB) Version 1.0 Compliant` Integrated USB Transceivers` Four Downstream Ports` Two Power Source Modes Self-Powered Mode Bus-Powered Mode` Power Switching and Overc...
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The TUSB2040A hub is a 3.3-V CMOS device that provides up to four downstream ports in compliance with the USB specification 1.0 version. Pin 21 (EXTMEM) enables or disables the EEPROM interface. When EXTMEM is low,the TUSB2040A is functionally equivalent to the TUSB2040 hub and the product ID (PID) displayed during enumeration is General Purpose USB Hub. For this configuration, pins 9 and 10 are the BUSPWR and GANGED input pins,respectively.
If programmable vendor ID(VID) and product ID(PID) descriptors are desired, pin 21 must be high (EXTMEM = 1) and a SGS Thompson M93C46 or equivalent EEPROM must be connected to pins 9 and 10. For this configuration,the values for BUSPWR and GANGED are stored in the EEPROM and pins 9 and 10 become the EEPROM interface.