CD4051 - Single 8-channel Multiplexer/Demultiplexer IC
The CD4051 analog multiplexers and demultiplexers IC are digitally-controlled analog switches having low ON impedance and very low OFF leakage current. These multiplexer circuits dissipate extremely low quiescent power over the full VDD – VSS and VDD – VEE supply-voltage ranges, independent of the logic state of the control signals.
Pinout:

Pinout of CD4051 Multiplexer/Demultiplexer IC