It might even be able to work with a CD4049. What I see is that it would require both sink and sourcing enough current. Realizing that, the CD4049 will not work, it can't source much current running at even 5 volts. So the application will require a TTL IC that can both sink and source.

It would work really well with a dual low-side driver IC. such as TC4426 or TC4427

 

Use a 74HC inverter. This circuit is self-timed, so that the coil doesn't remain powered if the processor stops.

Really like this approach, because the relay coil current is not going through the timing capacitor.

the application will require a TTL IC that can both sink and source.

AC series CMOS can sink and source 24 mA per output, which is significantly better than TTL. 3 inverters in parallel make a serious driver.

ak

ps. "sanitary" - ? ? ?

 

ps. "sanitary" - ? ? ?

Better ask @MisterBill2 and @sghioto !

 

Don't ask me ask MisterBill2.
However I don't even want to look at an IC much less touch one if it's not sanitary.

 

Better ask @MisterBill2 and @sghioto !

OK, in this case that means not requiring a lot of extra small components. probably "Neater" would have been a much better term to use. Certainly it is a language issue.

 

In this case, sanitary means more connected pins - 14 vs. 20.

ak