RAVINDRA'S BLOG

Tuesday, 30 January 2018

Logic Gates

Logic gates are the electronically controlled switches.
Logic Gates consists of two or more inputs and one output.
Logic Gates operation depends on two binary values either 1 or 0.
In Low state Logic Gate value is approximately 0V and in High state logic Gate value is approximately 5V.
According to  the  functionality total logic  gates are six.
  • AND
  • OR
  • NOT
  • NAND
  • NOR
  • XOR

AND Gate:

  • AND gate functionality is if any one of the input is ZERO(0),then output is.
  • IC number of AND gates is 7408.
  • It totally contains four gates in IC.
  • So,It has 8 inputs and 4 Outputs.
  • Port Nos 1,2,4,5,9,10,12,13 are input ports.
  • Port Nos 3,6,8,11 are output ports.

OR Gate:

  • OR gate functionality is if any one of the input is ON or  ONE(1), then output is ONE(1).
  • IC number of OR gate is 7432.
  • There are total four gates in IC.
  • So,It has 8 inputs and 4 Outputs.
  • Port Nos 1,2,4,5,9,10,12,13 are input ports.
  • Port Nos 3,6,8,11 are output ports. 

NOT Gate:

  • NOT gate is the negative of input. (ie., 0 = 1).
  • IC number of NOT gate is 7404.
  • There are total six gates in IC.
  • So,It has 6 inputs and 6 Outputs.
  • Port Nos 1,3,5,9,11,13 are input ports.
  • Port Nos 2,4,6,8,10,12 are output ports. 

NAND Gate:

  • NAND is nothing but the negative of the AND.
  • NOT gate is added at the output port of AND gate.
  • IC number of NAND gate is 7400.
  • There are total four  gates in IC.
  • So,It has 8 inputs and 4 Outputs.
  • Port Nos 1,2,4,5,9,10,12,13 are input ports.
  • Port Nos 3,6,8,11 are output ports.

NOR Gate:

  • NOR is nothing but the negative of the OR.
  • NOT gate is added at the output port of OR gate.
  • IC number of NOR gate is 7402.
  • There are total four  gates in IC.
  • So,It has 8 inputs and 4 Outputs.
  • Port Nos 2,3,5,6,8,9,11,12 are input ports.
  • Port Nos 1,4,10,13 are output ports.

XOR Gate:

  • XOR gate functionality is if all the inputs are same then output is ZERO(0).
  • IC number of XOR gate is 7486.
  • There are total four  gates in IC.
  • So,It has 8 inputs and 4 Outputs.
  • Port Nos 2,3,5,6,8,9,11,12 are input ports.
  • Port Nos 1,4,10,13 are output ports.