Ground and VCC on ICs
Hi guys,
My understanding of how integrated circuits work is a little cloudy. Obviously, an IC has many pins, in this example, I will use a quad 2 input AND gate, pins 1 and 2 will be inputs for the first AND gate, and 3 will be the output for the first AND gate.
diagram I am referencing : https://www.electronics-tutorials.ws/wp-content/uploads/2018/05/logic-log50.gif
What I don't understand is the GND and VCC pins. GND is obviously ground and all circuits must return to ground to complete the circuit, VCC is the voltage source .
Looking at the diagram, it's not clear how the 4 AND gates are powered, none of them seem to have a connection to VCC nor GND. Do all these AND gates have an implicit connection to VCC and GND? and it's just not shown in these IC diagrams?
Thanks
My understanding of how integrated circuits work is a little cloudy. Obviously, an IC has many pins, in this example, I will use a quad 2 input AND gate, pins 1 and 2 will be inputs for the first AND gate, and 3 will be the output for the first AND gate.
diagram I am referencing : https://www.electronics-tutorials.ws/wp-content/uploads/2018/05/logic-log50.gif
What I don't understand is the GND and VCC pins. GND is obviously ground and all circuits must return to ground to complete the circuit, VCC is the voltage source .
Looking at the diagram, it's not clear how the 4 AND gates are powered, none of them seem to have a connection to VCC nor GND. Do all these AND gates have an implicit connection to VCC and GND? and it's just not shown in these IC diagrams?
Thanks
Last edited on
Yes, it's an implementation detail. They are connected. It doesn't matter if the logic gates themselves are made of diodes or transistors or whatever.
The logic probably looks something like:
https://www.101computing.net/wp/wp-content/uploads/transistor-AND-Gate.png
The logic probably looks something like:
https://www.101computing.net/wp/wp-content/uploads/transistor-AND-Gate.png
Last edited on
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