Triple 3-Input AND Gate



To study and verify the truth table of Triple 3-Input AND Gate

Learning Objectives

  1. To understand the behavior and demonstrate the operation of Triple 3-Input AND Gate
  3. To develop digital circuit building and troubleshooting skills.

IC Used

For Triple 3-Input AND Gate:
IC NumberIC Name
74LS11Triple 3-input AND Gates

Circuit Tutorials:


  1. Place the IC on IC Trainer Kit.
  3. Implement the circuit as shown in the circuit diagram.


AND GATE - ​ It is a digital circuit that has two or more inputs and produces an output, which is the logical AND of all those inputs. It is optional to represent the Logical AND with the symbol ‘.’

Logic AND Gates are available using digital circuits to produce the desired logical function and is given a symbol whose shape represents the logical operation of the AND gate. Because the Boolean expression for the logic AND function is defined as (.), which is a binary operation, AND gates can be cascaded together to form any number of individual inputs. However, commercial available AND gate IC’s are only available in standard 2, 3, or 4-input packages. If additional inputs are required, then standard AND gates will need to be cascaded together to obtain the required output value.

Boolean Expression Y = A.B.C

"If A and B and C are true, then Y is true"

This AND gate produces an output Y, which is the logical AND of inputs A, B, C.

Block Diagram


  1. Make the connections according to the IC pin diagram.
  2. The connections should be tight on trainer kit.


We have learned the Triple 3-Input AND Gate IC according to the IC pin diagram.