Could someone please tell me what are the min and max output values that should be expected from a 555 timer Output (pin 3) given X volts as the voltage source?
For example, assuming that the 555 timer is powered by 9 volts, what should the pin 3 voltage be when the pin is low and when the pin is high? I was under the impression that the voltage should be 0 when the pin is low and 9 when the pin is high but instead I get 0 volts when the pin is low but only 7.7 volts when it is high (Note that I measured the voltage with no load on pin 3).
I tried this with a couple of timers that I have laying around here and they all did the same thing. At this point I am not sure if I have a bad batch of timers, if I am connecting things the wrong way of if this is the way is should be.
If possible, could someone also point me to the place in the timer 555 specs document where it specifies what the output should be? I tried looking at the specs but I got lost, I am still pretty new to electronics and spec sheets overwhelm me a little.
The specific timer I am using is NE555P.