We are trying to use this product:
I’ve bought about 10 of these for testing, but several shifters show strange problems. Basically, there is non-infinite resistance across pins of converters that we’ve connected, and when connecting LV to 3.3v and HV to 5V the following is seen:
- LV pins have high voltage (up to 3.8-4.5v)
- HV pins show <5V (4-4.5V)
If we solder pins to a brand new converter it firstly works fine, but later starts behaving incorrectly. Have we burned them? Is it related to soldering, shorting or something else?
(right two have been resoldered multiple time)
HV to H4 shorted:
HV to LV shorted
We have already burned several Teensy 4.1 boards with these level shifters, so any help is appreciated.