Implementing an OR with two TTL inputs and one TTL output

Development Boards Arduino
1

Hi there!

I’d like to find a device that allows (at least) 2 TTL inputs and performs an OR logic

and outputs the result to one TTL level signal. Ideally we want to be optically isolated.

I know there are several ways to approach this and I’d rather choose something

that is simple, low cost and with the least programming needed.

Thank you for your help,

M

2

The venerable 74LS32 (or whatever logic family you prefer) is a quad TTL OR gate. If you want an optoisolated version, I would use a 74LS02 (quad NOR) feeding a 4N26 or similar optoisolator.

No programming needed.

/mike