The internal configuration with an individual gate is displayed in figure 3. Figure 2 demonstrates the logic symbolic representation for just one gate, every single gate usually a "2 Input NAND Gate". You may find a specific circuit indicating an oscillator applying gates A and B, however this also means that the same can be designed using gates A and C, B and C or C and D also, without any problems.įigure 1 exhibits the logic circuit of your 7400 I.C. Gate D pins 13, 12 inputs, pin 11 output.The 4 gates of a 7400 are exactly the same with their specs: A mains driven 5 V regulated supply can be obtained through a number of options. Supply inputs to pins 14 and 7 are not shown in the drawings for simplicity sake, but you are advised not to forget to connect these pins, or else the circuit would simply fail to work!Īll the circuits work using a 4.5 V or 6 V DC supply however the typical voltage can be 5 volts. ![]() The I.C.s 7400 and the 7413 are 14 -pin DIL ICs, or "14 pin Dual In Line Integrated Circuits", where pin 14 is the positive supply V+ and pin 7 is the negative, ground or 0 V pin.
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