Can a 4051 Multiplexer accept +/- 12v bipolar power

Question

I'm looking to use a CD4051B multiplexer as a digitally-controlled switcher for audio signals.

The audio is coming from the HP / BP output of a voltage-controlled filter in a synth. The signal output is about 3v peak-to-peak. The mux select will be controlled by 5v TTL logic.

I only have supply voltages of 5v, 12v and -12v in my synth.

I'm finding the datasheets for the 4051 rather vague - has anyone had any success powering these chips with +/-12v bipolar power? (the -12v supply going to Vee)

Answer 1

I suggest to have the audio signal centered at 6V and power the 4051 with GND and 12V (it works with voltage supply up to 15V) and use a simple level shifter from 5V TTL to 12V (either inverting as shown in the diagram below or non-inverting; whatever suits better) for the logic signals.

^{simulate this circuit – Schematic created using CircuitLab}

Answer 2

The CD4051 is specified at rail to rail voltages from 5v to 20v. This is not enough to power directly from +/- 12v, but it is not necessary to have balanced rails, so powering the device from +5v and -12v will meet the required voltage range, see figure 9 of the TI data sheet.

This will allow direct coupling of voltages swinging about ground, with no need to AC couple. It will also allow logic control to be done with 0-5v, without a level shifter from the logic (simple or not!)

^{simulate this circuit – Schematic created using CircuitLab}