CD4051 Single 8-Channel Analog Multiplexer Demultiplexer IC

The CD4051 analog multiplexers demultiplexers are digitally controlled analog switches having low “ON” impedance and very low “OFF” leakage currents. Control of analog signals up to 15Vp-p can be achieved by digital signal amplitudes of 3−15V. For example, if VDD = 5V, VSS = 0V and VEE = −5V, analog signals from −5V to +5V can be controlled by digital inputs of 0−5V. The 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. When a logical “1” is present at the inhibit input terminal all channels are “OFF”.

CD4051BC 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 the input to the output.

Features:

• Wide range of digital and analog signal levels: digital 3 – 15V, analog to 15Vp-p.
• Low “ON” resistance: 80Ω (typ.) over entire 15Vp-p signal-input range for VDD − VEE = 15V.
• High “OFF” resistance: channel leakage of ±10 pA (typ.) at VDD − VEE = 10V.
• Logic level conversion for digital addressing signals of 3 – 15V (VDD − VSS = 3 – 15V) to switch analog signals to 15 Vp-p (VDD − VEE = 15V).
• Matched switch characteristics: RON = 5Ω (typ.) for VDD − VEE = 15V.
• Very low quiescent power dissipation under all digital-control input and supply conditions: 1 μ W (typ.) at VDD − VSS = VDD − VEE = 10V.
• Binary address decoding on chip.