TUSB2046B, TUSB2046BI

4PORT HUB FOR THE UNIVERSAL SERIAL BUS

WITH OPTIONAL SERIAL EEPROM INTERFACE

SLLS413B − FEBRUARY 2000 − REVISED DECEMBER 2004

13

POST OFFICE BOX 655303

APPLICATION INFORMATION

bus-powered hub, ganged-port power management

When used in bus-powered mode, the TUSB2046B supports up to four downstream ports by controlling a

TPS2041 device which is capable of supplying 100 mA of current to each downstream port. Bus-powered hubs

must implement power switching to ensure current demand is held below 100 mA when the hub is hot-plugged

into the system. Utilizing the TPS2041 for ganged-port power management provides overcurrent protection for

the downstream ports. The SN75240 transient suppressors reduce inrush current and voltage spikes on the

data lines. The OVRCUR signals must be tied together for a ganged operation.