The CD4051B-Q1 and CD4053B-Q1 analog multiplexers are digitally-controlled analog switches having low ON impedance and very low OFF leakage current. Control of analog signals up to 20 V_P-P can be achieved by digital signal amplitudes of 4.5 V to 20 V (if V_DD – V_SS = 3 V, a V_DD – V_EE of up to 13 V can be controlled; for V_DD – V_EE level differences above 13 V, a V_DD – V_SS of at least 4.5 V is required). For example, if V_DD = +4.5 V, V_SS = 0 V, and V_EE = –13.5 V, analog signals from –13.5 V to +4.5 V can be controlled by digital inputs of 0 V to 5 V. These multiplexer circuits dissipate extremely low quiescent power over the full V_DD – V_SS and V_DD – V_EE supply-voltage ranges, independent of the logic state of the control signals. When a logic 1 is present at the inhibit input terminal, all channels are off.

The CD4051B-Q1 device is a single 8-channel multiplexer having three binary control inputs, A, B, and C, and an inhibit input. The three binary signals select 1 of 8 channels to be turned on, and connect one of the 8 inputs to the output.

The CD4053B-Q1 device is a triple 2-channel multiplexer having three separate digital control inputs, A, B, and C, and an inhibit input. Each control input selects one of a pair of channels which are connected in a single-pole, double-throw configuration.

When these devices are used as demultiplexers, the CHANNEL IN/OUT terminals are the outputs and the COMMON OUT/IN terminals are the inputs.