What is the maximum no. of outputs, from different 7400 gates that could be connected together ? How many gates can be connected to the output of a 7400 gate ? The answer to the 2nd question according to me is that if the output of a 7400 gate is high then the no. of gates connected depend on the output voltage , if it goes below 2v then the gate connected will have no input . If the output is low , no input can be connected . The ans. to 1st question might be that the combination of resultant output must lie b/w 5 & 2v , for high and (0-0.8v ) for low , but i am not sure of a maximum no . ?