[sdiy] Quick question about 4066/4016 switches

[Tom Wiltshire]

Thanks Mark, I'll try it. I can always fall back to transistors if necessary.

T.

On 15 Mar 2011, at 18:58, mark verbos wrote:

> 
> On Mar 15, 2011, at 2:37 PM, Tom Wiltshire wrote:
> 
>> Hi all,
>> 
>> What's the best way to convert a 5V logic signal to switch a 4066/4016 analogue switch?
>> 
>> I was thinking of using transistors an pull-up resistors, but is there a better way?
>> 
>> The switch is running on a single ended 9V supply, if that makes any difference.
>> 
>> Thanks,
>> Tom
> 
> 
> Tom,
> 
> In the Deltalab digital delays they use a trick that I have applied successfully as well. The RAM chips are at 5v and they feed to CMOS running on 12v, but the values can be tweaked for other voltages. The signal from the RAM had a diode to +5 to protect voltage coming back into it, then the signal goes through a 9.53k resistor and a .1 cap in parallel. At the other side of that there's a 16.2k pull up resistor. I have done this with 5v and 15v by using a 10k and 18k respectively and it works like a charm. It may not be proper, but it does work. And, in your case the cap might not even be necessary!
> 
> Mark