SCDS300D July 2010 – August 2016 TS3USB221A-Q1
Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality.
There are many USB applications in which the USB hubs or controllers have a limited number of USB I/Os. The TS3USB221A-Q1 solution can effectively expand the limited USB I/Os by switching between multiple USB buses to interface them to a single USB hub or controller.
Design requirements of the USB 1.0,1.1, and 2.0 standards should be followed.
TI recommends pulling the digital control pins S and OE up to VCC or down to GND to avoid undesired switch positions that could result from the floating pin.
The TS3USB221A-Q1 can be properly operated without any external components. However, TI recommends connecting unused pins to ground through a 50-Ω resistor to prevent signal reflections back into the device.