Unbuffered CD4066 availability

[candidate]

Does anyone sell an unbuffered CD4066?

Is it critical in the MXR envelope filter? 
http://tonepad.com/getFileInfo.asp?id=113
or can the buffered cd4066 be used?

It seems more important to have the unbuffered CD4069 chips.

[armdnrdy]

http://www.taydaelectronics.com/catalogsearch/result/?q=CD4069UBE

The morning coffee got the best of me! 

and I have 4069 on the brain from the project I'm working on!

[slacker]

I don't know if unbuffered or buffered means anything for CD4066s. It's doesn't matter anyway, for us unbuffered only matters when you're using CMOS chips in linear mode as amplifiers, like some of the CD4069s in the MXR. The CD4066s are being used as switches so any type will work, assuming there are different types.

[Mark Hammer]

My drawing from my old (pre-1980) Envelope Filter specify a 4069UBE and a CD4066AE.

[PRR]

> unbuffered CD4066?
> unbuffered CD4069 chips.

Six or Nine?

The 4066 is a switch. There is/was a lower-performance part the 4016. I can't see why you'd want it.

The 4069 is supposed to be a digital inverter. It can be re-used as an audio inverter/ amplifier/ distorter.

Back in the old days I messed with CD4069 as audio-amp a LOT. Never any problem making it amplify into distortion.

It *looks* like most of the "4069" you can buy today are also "UB", un-buffered. I can't even find any buffered 4069. Don't know why they would be needed for anything?

You could just buy from a pedal specialist like SmallBear. He knows what you want, his customers will tell him if he got something that isn't right for pedals.

[GFR]

From the TI data books:
4016


4066

The CD4066B is a quad bilateral switch intended for the transmission or multiplexing of analog or digital signals.
It is pin-for-pin compatible with the CD4016B, but exhibits a much lower on-state resistance. In addition, the
on-state resistance is relatively constant over the full signal-input range.

The CD4066B consists of four bilateral switches, each with
independent controls. Both the p and the n devices
in a given switch are biased on or off simultaneously by the control
signal. As shown in Figure 1, the well of the
n-channel device on each switch is tied to either the input (when the switch is on) or to VSS
(when the switch is off). This configuration eliminates the variation of the switch-transistor threshold voltage with input signal and,
thus, keeps the on-state resistance low over the full operating-signal range.

The advantages over single-channel switches include peak input-signal voltage swings equal to the full supply
voltage and more constant on-state impedance over the input-signal range. However, for sample-and-hold
applications, the CD4016B is recommended.

http://www.ti.com/lit/ds/symlink/cd4066b.pdf