Could you help provide COM port BUS switch IC and LPC BUS switch IC quick select guide?

Cao Cao,

There are several ways to select a signal switch from TI.

You may search through our switches and multiplexers parametric table on TI.com using several filtering and sorting tools to help you quickly find your device.  

You may also check out these selection guides found on the switches and multiplexers technical documents tab on TI.com.

What type of application are you trying to find a switch?  Do you know what configuration you need 1:1, 4:1, etc?  What voltage range are your signals in? 

Thank you,

Adam