74S08 DATASHEET PDF

The device should not be operated at these limits. The parametric values defined in the Electrical Characteristics tables are not guaranteed at the absolute maximum ratings. The Recommended Operating Conditions table will define the conditions for actual device operation. Note 3: Not more than one output should be shorted at a time, and the duration should not exceed one second. Fairchild does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and Fairchild reserves the right at any time without notice to change said circuitry and specifications. As used herein: 1.

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For this part, concentrate only on the flatter part of the Digital Kit, not the circuit board that is upright, facing you. Please follow the steps below. Use the information shown in the Figure 1 to help you wire the circuit.

Figure 1 : Wiring of an IC on the breadboard. Always identify pin 1 of the IC which is on the left or below the notch or circle embossed on the top of the chip. Find the nature of the logic gate you are testing by activating all combinations of A and B. Do the same for pin 4, 5 inputs , and 6 output. And for pins 13, 12 inputs , and 11 output. And for pins 10, 9 inputs , and 8 output. Swap the for a , and repeat the same experiment. What logic function do you now have?

Just check Pins 1, 2, and 3. The other triplets implement the same boolean function , that is replicated 3 times. Swap the for a , and repeat the same experiment for the first gate.

The is wired slightly differently than the other circuits. Connect its pin 1 to a logic indicator, and Pins 2 and 3 to data switches. What is its logic function? Let's now test the Connect pins 1 and 3 to data switches, and pin 2 to a logic indicator. What is the logic function implemented by this circuit?

Hints: there's a trick here Connect pins 1 and 2 to data switches, and pin 3, the output, to a logic indicator. Once you have reached this point, checks your answers against the datasheets for the circuits you have used today. A datasheet is a set of pages containing the engineering directions for using a circuit. The next experiment for this lab is to wire up a two-bit adder.

First fill out the truth table below, where SUM and CARRY are the two functions that you need to implement, and that represent the arithmetic sum of the two inputs. If you have time, build a majority voter. A majority voter is a circuit with 3 inputs that outputs what the majority of the inputs represent. In other words, if 2 or more of the inputs are 1, the output is 1.

If 2 or more of the inputs are 0, the output is 0. You have to write a lab report for this lab. The key part of a lab report is that it should be self-contained. The answer to a question may not be very useful if the question is not also part of the report. Ideally, a good lab report should be all that is needed for someone else to repeat all the experiments.

A simple way to accomplish this is to use the text of this Web page as appendix to your report, or to simply cut and paste the various sections of the lab into your typed report. This is not cheating: it's just documenting the experiment you had to perform. Then you write up your observations and results. Usually a paragraph a 3 to 5 lines is sufficient for most answers.

If an experiment does not work, report the experiment as you experienced it, and do not guess what you think should have happened. Your lab report is due a week after the lab is performed. In this case, a week after the engineering question is fully covered in class. Even if we answer all the questions in class, you should report them in your report. From dftwiki. Jump to: navigation , search.

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