You can find the functions of the 14 pins in the datasheets. It is normally recommended that users do not supply the multiplexer with voltages higher than 36V. There should be 13V voltage fed to the electrical part below 13V. If put voltage greater than 22V on the multiplexer, damage may be caused to the device. If you are using dual power supplies, you should attach at least 7V.
SJM306BCC01 Features
SJM306BCC01 Applications
There are a lot of Vishay Siliconix SJM306BCC01 Analog Switches & Multiplexers ICs applications.