[time-nuts] Re: electronics question or how not to fry my raspberry pi

[glen english LIST]

and unless you have LOTS of experience, avoid automatic direction 
(bidirectional)Â  translators - they are very sensitivie to pullups, 
downs etc. I think best avoided unless there is no option. I2C is where 
they are useful.

But otherwise, stick to unidirectional level translating as Andrew suggests.

There are few solutions that you cannot translate with just a single 
transistor .

The chip translators are good for speed and edge rate.

On 29/01/2022 7:20 am, Andrew Kalman wrote:
>   I find that the best way to handle these translations is to use one of
> TI's level translators ... each chip has two power supply rails, and
> translation is done transparently across the chip, and there is good max
> voltage overprotection on both sides  as well. I use them a lot to handle
> 5V <-> 3.3V level issues.
>
> Try the SN74LVC8T245PWR for unidirectional level translating . They also
> have some bidirectional ones ...