The datasheets for the 14 pins explain the functions. Despite this switch's dual supply capability, its voltage should not exceed 18V. For dual power supplies, a voltage of at least 10V should be attached. An environment with a temperature greater than 125°C should not be used to operate the digital switches. There are 2 outputs on the analogue multiplexer.
SJM181BCA01 Features
SJM181BCA01 Applications
There are a lot of Vishay Siliconix SJM181BCA01 Analog Switches & Multiplexers ICs applications.