Ee205 lab manual 4 1

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YILDIRIM BEYAZIT UNIVERSITY ECE 205 – DIGITAL DESIGN LABORATORY MANUAL – 6 – Construction of Simple Combinational Circuits Objectives: 

Learn how to use the breadboard for prototyping

Develop good wiring practices

Improve circuit diagram drawing and annotating abilities

Equipment: 

Breadboard, IC7408, IC7432, IC7400

Introduction: 

The types of chips used in this experiment are known as the 7400 series. (Their code numbers begin with the two digits 74). They are encapsulated in black epoxy. This encapsulation form is called “Dual In-Line Package” or DIP in short. This name refers to the location of the pins. The pins of a DIP chip have a fixed, conventional numbering scheme: counterclockwise viewed from the top of the chip. Pin 1 is usually marked with a dimple or a notch in the package.

For each chip that you use in a logic design, you need to know what function the chip performs, and how it is wired internally. There is a four-digit or five-digit code printed on the chip. This code number is the identifier to use in locating the function of the chip. In the following figure (Fig. 1) the specific numbering scheme is provided for several chips, showing which pin numbers connect to which elements of each component inside the package. (Quadruple means that there are four gates in the chip). This numbering information is called the "pin-out" information for the chip.

(a)

(b)

Fig.1. Pin configuration and logic symbol for a.7408 chip (Quadruple 2-input AND gate) b. for 7432 chip (Quadruple 2-input OR gate)


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