[SOLVED] digital integrated circuits

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vter

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I am puzzled about the equivalent circuit of digital IC's input and output ports.

I consider the input port to be an equivalent resistor and equivalent capacitor parallel to the ground , and the output port is a voltage source series resistor

to the output .The voltage source voltage and resistor value depend on the level of the output.


Do I understand what I'm asking?
 

i do not see a question
 
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    vter

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often the inputs have diodes to Vcc & Vee for protection ...

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ditto for the o/p pins ...
 
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    vter

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Easy peasy said:
often the inputs have diodes to Vcc & Vee for protection ...

- - - Updated - - -

ditto for the o/p pins ...
Click to expand...

Yep. In a modern ASIC there is still a lot more. You can expect a lot of level shifting going around, a lot of clamps for ESD protection, buffers, etc.
 

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