XNOR gate facts for kids

The XNOR gate is a special kind of logic gate that works with two inputs, usually called A and B. It gives you an output of 1 (which means "true" or "on") only when both of its inputs are the same. So, if both inputs are 0 (off) or both inputs are 1 (on), the XNOR gate will output 1. If the inputs are different (one is 0 and the other is 1), the XNOR gate will output 0 (which means "false" or "off").

Think of it like a "match detector." If the inputs match, it says "yes!" (1). If they don't match, it says "no." (0).

This gate is the exact opposite of the XOR gate. Where an XOR gate outputs 1 when inputs are different, the XNOR gate outputs 1 when inputs are the same.

What are Logic Gates?

Logic gates are like tiny electronic switches that make decisions. They are the basic building blocks of all digital circuits, like those found in computers, phones, and video games. They take one or more inputs and produce a single output, based on a set of rules. These rules are called "logic."

How XNOR Gates are Used

XNOR gates are very useful in digital electronics. They are often used for:

• Equality checking: They can quickly tell if two binary numbers or signals are exactly the same.
• Error detection: In computer memory or data transmission, XNOR gates can help check if data has been corrupted or changed.
• Arithmetic circuits: They are part of circuits that perform addition and subtraction in computers.

Different Ways to Draw an XNOR Gate

Just like there are different ways to write letters, there are different symbols used to represent an XNOR gate in circuit diagrams. These symbols help engineers understand how electronic circuits are designed.

The MIL/ANSI symbol is often used in North America.	The IEC symbol is common in Europe and other parts of the world.	The DIN symbol is another way to show an XNOR gate.
MIL/ANSI Symbol	IEC Symbol	DIN Symbol

Images for kids

• 

  This image shows the "pinout" of an XNOR gate chip. The pins are the metal legs that connect the chip to a circuit board.

See also

• Logic gate
• XOR gate
• AND gate
• OR gate
• NOT gate

• In Spanish: Puerta XNOR para niños