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7408 7432 7404 7400 7486 IC Datasheet Pin Diagram Truth Table Guide

What are Logic Gates?

Logic gates are fundamental electronic components that perform basic logical operations on one or more binary inputs to produce a single binary output. These gates are the building blocks of digital circuits and are essential for understanding how computers and digital devices work.

In digital electronics, information is represented using only two states: 0 (low voltage) and 1 (high voltage). Logic gates process these binary signals according to Boolean algebra rules, allowing complex operations to be performed by combining simple logical functions.

Basic Types of Logic Gates

There are seven basic types of logic gates, each with its own specific function:

1. AND Gate

The AND gate produces a high output (1) only when all inputs are high (1). If any input is low (0), the output will be low (0).

Truth Table:

ABOutput
000
010
100
111

2. OR Gate (7432)

The OR gate produces a high output (1) when at least one of the inputs is high (1). The output is low (0) only when all inputs are low (0).

Truth Table:

ABOutput
000
011
101
111

3. NOT Gate (7404)

The NOT gate, also called an inverter, produces an output that is the opposite of the input. If the input is high (1), the output is low (0), and vice versa.

Truth Table:

AOutput
01
10

4. NAND Gate (7400)

The NAND gate is the combination of an AND gate followed by a NOT gate. It produces a low output (0) only when all inputs are high (1).

Truth Table:

ABOutput
001
011
101
110

5. NOR Gate (7402)

The NOR gate is the combination of an OR gate followed by a NOT gate. It produces a high output (1) only when all inputs are low (0).

Truth Table:

ABOutput
001
010
100
110

6. XOR Gate (7486)

The XOR (Exclusive OR) gate produces a high output (1) when the inputs are different from each other. If both inputs are the same, the output is low (0).

Truth Table:

ABOutput
000
011
101
110

7. XNOR Gate

The XNOR (Exclusive NOR) gate is the complement of the XOR gate. It produces a high output (1) when both inputs are the same.

Applications of Logic Gates

Logic gates are used in numerous applications within digital electronics:

  • Processors and Microcontrollers: Form the basis of arithmetic and logic units (ALU)
  • Memory Systems: Used in flip-flops, latches, and memory cells
  • Digital Counters: Enable counting and timing operations
  • Multiplexers and Demultiplexers: For data routing and selection
  • Encoders and Decoders: For data conversion and display systems
  • Arithmetic Circuits: For addition, subtraction, and other mathematical operations

Electrical Characteristics

Most logic gates operate with TTL (Transistor-Transistor Logic) technology, with the following typical characteristics:

  • Supply Voltage (VCC): 5V 卤5%
  • Logic High (VIH): 2.0V minimum
  • Logic Low (VIL): 0.8V maximum
  • Output High (VOH): 2.4V minimum
  • Output Low (VOL): 0.4V maximum
  • Propagation Delay: 10-22 ns typical

Conclusion

Logic gates are essential components in digital electronics, enabling the creation of complex digital systems from simple logical operations. Understanding how these gates work and their applications is fundamental for anyone working with digital circuits, from basic electronic projects to advanced computer systems.

Each integrated circuit family (7400 series) provides reliable and standardized implementations of these logical functions, making them indispensable tools in electronic design and education.

Complete IC datasheet guide for 7408 AND gate, 7432 OR gate, 7404 NOT gate, 7400 NAND gate, 7486 XOR gate. Pin diagrams, truth tables, and electrical characteristics included.

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TTL Logic Gate Integrated Circuits

7408 IC Datasheet - AND Gate Pin Diagram Truth Table (Circuito Integrado SN74LS08)

The 7408 IC datasheet shows a quad 2-input AND gate integrated circuit. This 7408 datasheet includes pin diagram, truth table, and IC specifications. The 7408 integrated circuit AND gate output is HIGH (1) only when both inputs are HIGH (1). Check the complete 7408 IC pin configuration and datasheet for technical details.

IC Pin Configuration

2 inputs and 1 output per gate (4 gates per IC)

Boolean Function and Logic OperationOutput = A AND B
Digital Electronics Applications

Address decoding circuits, Enable signal generation...

Complete Truth Table

Input AInput BOutput Y
1
1
111

IC Datasheet and Pin Diagram

Datasheet 7408 IC Datasheet - AND Gate Pin Diagram Truth Table (Circuito Integrado SN74LS08) - Integrated circuit 7408

7432 IC Datasheet - OR Gate Pin Diagram Truth Table (Circuito Integrado SN74LS32)

The 7432 IC datasheet shows a quad 2-input OR gate integrated circuit. This 7432 datasheet includes pin diagram, truth table, and complete IC specifications. The 7432 integrated circuit OR gate output is HIGH (1) when at least one input is HIGH (1). Check the 7432 IC pin configuration and datasheet for detailed information.

IC Pin Configuration

2 inputs and 1 output per gate (4 gates per IC)

Boolean Function and Logic OperationOutput = A OR B
Digital Electronics Applications

Interrupt handling systems, Alarm circuits...

Complete Truth Table

Input AInput BOutput Y
11
11
111

IC Datasheet and Pin Diagram

Datasheet 7432 IC Datasheet - OR Gate Pin Diagram Truth Table (Circuito Integrado SN74LS32) - Integrated circuit 7432

7404 IC Datasheet - NOT Gate Pin Diagram Truth Table (Circuito Integrado SN74LS04)

The 7404 IC datasheet shows a hex inverter (NOT gate) integrated circuit. This 7404 datasheet includes pin configuration, truth table, and complete IC specifications. The 7404 integrated circuit NOT gate inverts the input signal - when input is HIGH (1), output is LOW (0). Check the 7404 IC pin diagram and datasheet for technical specifications.

IC Pin Configuration

1 input and 1 output per gate (6 gates per IC)

Boolean Function and Logic OperationOutput = NOT A
Digital Electronics Applications

Signal inversion, Clock conditioning...

Complete Truth Table

Input AInput BOutput Y
1
1

IC Datasheet and Pin Diagram

Datasheet 7404 IC Datasheet - NOT Gate Pin Diagram Truth Table (Circuito Integrado SN74LS04) - Integrated circuit 7404

7400 IC Datasheet - NAND Gate Pin Configuration Truth Table (Circuito Integrado SN74LS00)

The 7400 IC datasheet shows a quad 2-input NAND gate integrated circuit. This 7400 datasheet includes pin diagram, truth table, and complete IC specifications. The 7400 integrated circuit NAND gate output is LOW (0) only when both inputs are HIGH (1). The 7400 IC is a universal logic gate. Check the 7400 IC pin configuration and datasheet for detailed specifications.

IC Pin Configuration

2 inputs and 1 output per gate (4 gates per IC)

Boolean Function and Logic OperationOutput = NOT (A AND B)
Digital Electronics Applications

Flip-flop circuits, Memory circuits...

Complete Truth Table

Input AInput BOutput Y
1
11
11
11

IC Datasheet and Pin Diagram

Datasheet 7400 IC Datasheet - NAND Gate Pin Configuration Truth Table (Circuito Integrado SN74LS00) - Integrated circuit 7400

7486 IC Datasheet - XOR Gate Pin Diagram Truth Table (Circuito Integrado SN74LS86)

The 7486 IC datasheet shows a quad 2-input XOR (exclusive OR) gate integrated circuit. This 7486 datasheet includes pin diagram, truth table, and complete IC specifications. The 7486 integrated circuit XOR gate output is HIGH (1) only when inputs are different. Check the 7486 IC pin configuration and datasheet for technical details.

IC Pin Configuration

2 inputs and 1 output per gate (4 gates per IC)

Boolean Function and Logic OperationOutput = A XOR B
Digital Electronics Applications

Parity checking circuits, Binary adders...

Complete Truth Table

Input AInput BOutput Y
11
11
11

IC Datasheet and Pin Diagram

Datasheet 7486 IC Datasheet - XOR Gate Pin Diagram Truth Table (Circuito Integrado SN74LS86) - Integrated circuit 7486

7402 IC Datasheet - NOR Gate Pin Configuration Truth Table (Circuito Integrado SN74LS02)

The 7402 IC datasheet shows a quad 2-input NOR gate integrated circuit. This 7402 datasheet includes pin diagram, truth table, and complete IC specifications. The 7402 integrated circuit NOR gate output is HIGH (1) only when both inputs are LOW (0). The 7402 IC is a universal logic gate like NAND. Check the 7402 IC pin configuration and datasheet.

IC Pin Configuration

2 inputs and 1 output per gate (4 gates per IC)

Boolean Function and Logic OperationOutput = NOT (A OR B)
Digital Electronics Applications

Flip-flops, Universal logic gate implementation...

Complete Truth Table

Input AInput BOutput Y
1
1
1
11

IC Datasheet and Pin Diagram

Datasheet 7402 IC Datasheet - NOR Gate Pin Configuration Truth Table (Circuito Integrado SN74LS02) - Integrated circuit 7402

74266 IC Datasheet - XNOR Gate Pin Configuration Truth Table (Circuito Integrado SN74LS266)

The 74266 IC datasheet shows a quad 2-input XNOR (exclusive NOR) gate integrated circuit. This 74266 datasheet includes pin diagram, truth table, and complete IC specifications. The 74266 integrated circuit XNOR gate output is HIGH (1) when both inputs are equal. Check the 74266 IC pin diagram and datasheet for technical specifications.

IC Pin Configuration

2 inputs and 1 output per gate (4 gates per IC)

Boolean Function and Logic OperationOutput = NOT (A XOR B)
Digital Electronics Applications

Equality comparators, Data comparison circuits...

Complete Truth Table

Input AInput BOutput Y
1
1
1
111

IC Datasheet and Pin Diagram

Datasheet 74266 IC Datasheet - XNOR Gate Pin Configuration Truth Table (Circuito Integrado SN74LS266) - Integrated circuit 74266

7407 IC Datasheet - Buffer Driver Pin Configuration (Circuito Integrado SN74LS07)

The 7407 IC datasheet shows a hex buffer/driver with open-collector outputs. This 7407 datasheet includes pin diagram, specifications, and complete IC details. The 7407 integrated circuit buffer amplifies current without changing signal logic. Check the 7407 IC pin diagram and datasheet for driving heavy loads and interface applications.

IC Pin Configuration

1 input and 1 output per buffer (6 buffers per IC)

Boolean Function and Logic OperationOutput = A (current amplified)
Digital Electronics Applications

LED driver circuits, Relay interface drivers...

Complete Truth Table

Input AInput BOutput Y
11

IC Datasheet and Pin Diagram

Datasheet 7407 IC Datasheet - Buffer Driver Pin Configuration (Circuito Integrado SN74LS07) - Integrated circuit 7407

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