IC 74HC132 PDF

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Learning Electronics Need to brush up on your electronics principles?

Also note that OR gates can be directly cascaded to make a compound OR gate with any desired number of inputs. Part 4 Practical digital mixed gate and special-purpose logic gate ICs such as programmable logic, majority logic, and digital transmission gate types.

Just make sure the buffer has a fan-in of one in the former case, and a fan-in of two in the latter. Relatively few dedicated OR gate ICs are available.

The simplest way to make an OR gate is via a number of diodes and a single resistor, as shown for example in the three-input OR gate of Figure Six popular OR gate ICs. The 74LS10 and B see 7h4c132 6 and 7 are triple three-input standard types; the 74LS20 and B see Figures 8 and 9 are dual 74hd132 standard types; the 74LS30 and B see Figures 10 and 11 are eight-input standard types; and the 74HC is a input standard type.

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74HC132 Quad 2-Input NAND Gate

Figure 24for example, shows ways of cascading two-input elements to make OR gates with three, four, or five inputs, and Figure 25 shows a three-input OR element and a three-input diode OR gate cascaded to 774hc132 a compound five-input OR gate. Example of a compound five-input OR gate circuit.

These multi-part series may be just what you need! Simple three input diode OR gate.

74HC – 74HC Quad 2-input NAND Schmitt Trigger

Ways of cascading two-input OR gates to get up to five inputs. Need to brush up on your electronics principles? Figure 17 lists basic details of the six most popular OR gate ICs: Note that the fan-in 7h4c132 a TTL NOR gate is directly proportional to the number of inputs used — at a fan-in rate of one per input — and that a TTL two-input OR gate can be made to act as a simple non-inverting buffer by either tying one input to ground or by tying both inputs together, as shown in Figure The diode OR gate is reasonably fast, very cost-effective, and can readily be expanded to accept any number of inputs by simply adding one more diode to the circuit for each new input.

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In this case, the unwanted inputs can be disabled by either tying them high directly in CMOS gates, or via a 1K resistor in TTL i or by simply shorting them directly to a used input.

The output of an OR gate goes high when any of its inputs A or B, etc.