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Electronics Technician
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Electronics Technician
Incoroporated chip controller,
Integrated circuits are the little black "chips", found all over embedded electronics.
An IC is a collection of electronic components -- resistors, transistors, capacitors, etc. -- all stuffed into a tiny chip, and connected together to achieve a common goal. They come in all sorts of flavors: single-circuit logic gates, op amps, 555 timers, voltage regulators, motor controllers, microcontrollers, microprocessors, FPGAs...the list just goes on-and-on.
Covered in this Tutorial
- The make-up of an IC
- Common IC packages
- Identifying ICs
- Commonly used ICs
Suggested Reading
Integrated circuits are one of the more fundamental concepts of electronics. They do build on some previous knowledge, though, so if you aren't familiar with these topics, consider reading their tutorials first...
What is a Circuit?Every electrical project starts with a circuit. Don't know what a circuit is? We're here to help. ResistorsA tutorial on all things resistors. What is a resistor, how do they behave in parallel/series, decoding the resistor color codes, and resistor applications. DiodesA diode primer! Diode properties, types of diodes, and diode applications. PolarityAn introduction to polarity in electronic components. Discover what polarity is, which parts have it, and how to identify it. CapacitorsLearn about all things capacitors. How they're made. How they work. How they look. Types of capacitors. Series/parallel capacitors. Capacitor applications. TransistorsA crash course in bi-polar junction transistors. Learn how transistors work and in which circuits we use them. Inside the IC
When we think integrated circuits, little black chips are what come to mind. But what's inside that black box?
The guts of an integrated circuit, visible after removing the top.
The real "meat" to an IC is a complex layering of semiconductor wafers, copper, and other materials, which interconnect to form transistors, resistors or other components in a circuit. The cut and formed combination of these wafers is called a die.
While the IC itself is tiny, the wafers of semiconductor and layers of copper it consists of are incredibly thin. The connections between the layers are very intricate. Here's a zoomed in section of the die above:
An IC die is the circuit in its smallest possible form, too small to solder or connect to. To make our job of connecting to the IC easier, we package the die. The IC package turns the delicate, tiny die, into the black chip we're all familiar with.
The package is what encapsulates the integrated circuit die and splays it out into a device we can more easily connect to. Each outer connection on the die is connected via a tiny piece of gold wire to a pad or pinon the package. Pins are the silver, extruding terminals on an IC, which go on to connect to other parts of a circuit. These are of utmost importance to us, because they're what will go on to connect to the rest of the components and wires in a circuit.
There are many different types of packages, each of which has unique dimensions, mounting-types, and/or pin-counts.
Polarity Marking and Pin Numbering
All ICs are polarized, and every pin is unique in terms of both location and function. This means the package has to have some way to convey which pin is which. Most ICs will use either a notch or a dot to indicate which pin is the first