Strange element


Hello all. Please help me, what it is?

Hello,

Inverter (logic gate) - Wikipedia

BR, Jan

Thank you.
How do you think this element will fit here?74HC14D http://www.farnell.com/datasheets/2000343.pdf

I do not know I am not an engineer. But If the data from datasheet are ok with your requirements…
Logic NOT Gate Tutorial with Logic NOT Gate Truth Table (electronics-tutorials.ws)
BR, Jan

@maatdevelop
The alternative (provided the UART is 5V tolerant) is to modify the circuit a little to use a NPN transistor:
image

I have encountered a similar problem recently, and I am trying to solve it