How does ADG3245 working?

 ADG3245 can change 2.5V  to  1.8V it is allow bidirectional signals,

so my question is ,

1, if signal comes from  1.8V  side ,  to ADG3245  the output is connected to 2.5V side.

can this working good?

2, When VCC=2.5V   SEL=2.5V  BE=0   in this mode it makes 2.5 to 1.8 V 

and Port A must connect to VCC side  and Port B must connect to 1.8V  side ,is this right ?