I was testing each of these IC on separate breadboard. Looks like 74LS08 is fried. Output is low no matter what the input is.

 

But why are you simulating such a simple circuit? That's akin to using a calculator to add 12+34.

In the original tutorials, Ben expresses the need to have clean square pulses. I wanted to see how close multisim's simulation is to the practical implementation (by cross-checking my multisim's result with the practical results of ben). Moreover, this was my first time with multisim. So I chose this circuit to be my "hello world" circuit.

 

this was my first time with multisim

If you're going to ask someone to read your schematic, give them something easy to read.

Learn how to use the shift key to force Multisim to make cleaner routes and place components so the flow is primarily left to right and top to bottom.

 

555's don't like 5v to start with.

 

555's don't like 5v to start with.

Can you cite some sources to substantiate that?

Datasheets say 4.5-16V and I think I recall reading in a Signetics application manual that some parts worked as low as 3V.

I routinely operate them at 5V and I haven't had any part not be able to drive CMOS reliably (i.e. no pull up resistor required). I've also never experienced a problem with the so-called shoot through on the output.

I've been using them for over 40 years.

 

74C14 has 6 Schmitt Triggers. I use them for every circuit. I never use a 555.

 

Excerpt from 1979 Signetics Analog Applications Manual in the Timer section:


I included the reference to good filtering and bypassing which minimizes issues that some have reported with shoot through current.

 

They will tell you anything. I had a 555 on 5.5v and things did not clock. The voltage had to be higher.
Some will, some won't.

 

No offense, but thats really odd.
Anyway I will keep it it in mind if a 555 fails in my future circuits.