Diodes and IC's

[mark_3094]

I think I have read somewhere that the output of one IC should not be connected directly to the input of another IC.
Eg, 555 Timer -> Decade Counter -> Another Decade counter

Is that true?
Wouldn't that have a really high voltage drop?



Thanks

 

[Leftyretro]

I think I have read somewhere that the output of one IC should not be connected directly to the input of another IC.
Eg, 555 Timer -> Decade Counter -> Another Decade counter

Is that true?
Wouldn't that have a really high voltage drop?



Thanks

It depends on the voltage level each IC is using. Generally if they are all using the same voltage level they can be connected directly, that is an output signal of one IC can wire to a input pin of another IC. It really depends on the specific ICs you want to talk about.

Lefty

 

[dknguyen]

What does voltage drop have to do with anything? It's not like resistors. Each IC has it's own connection to the power supply that it uses to generate it's new output signal.

As long as the input pin can tolerate the voltage of the output pin it will survive. For it to work, the voltage thresholds for logic 0s and 1s have to be the similar enough to work.

 

[Mikebits]

I think I have read somewhere that the output of one IC should not be connected directly to the input of another IC.
Eg, 555 Timer -> Decade Counter -> Another Decade counter

Is that true?
Wouldn't that have a really high voltage drop?

Thanks

Maybe you misread. Perhaps it was do not connect output to output.

 

[Gayan Soyza]

TTL inputs are awesome.