Thursday, September 24, 2015

Microchips

I was recently asked to put some info on microchips. So, here it is.
Microchips are basically just Integrated circuits. An example of an integrated circuit is an IC7404, which is a simple NOT gate. (What a NOT gate does is, it inverts the input. In simple words, it converts the input to it's complement. So, if the input is one, the output is zero)
Now, in an IC7404, there are 6 not gates embedded inside one chip. Which means, one can use a single chip to perform 'not' function on 6 inputs.

So what's inside the chip?
The answer to this question becomes complex when we talk about embedding the not gates inside a chip. But a simple not gate contains BJT transistors, diodes and resistors. Other transistors can also be used but the basic not is composed of these components. 
Of course, microchips are way more than just embedded gates. I have taken the example of not as it's simple to explain. Other examples of microchips are :  IC7408 (AND gate), IC7486 (XOR gate), etc.
Here are some links that may be helpful -
1. http://hyperphysics.phy-astr.gsu.edu/hbase/electronic/buffer.html#c4
2. http://www.allaboutcircuits.com/textbook/digital/chpt-3/not-gate/
3. (Taking a look at the datasheet of an IC is useful in learning more about the IC) http://www.engineersgarage.com/electronic-components/74ls04-datasheet
IC7404- Pin diagram
 

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