7402 IC Datasheet - NOR Gate Pin Configuration Truth Table (Circuito Integrado SN74LS02) 7402
IC Datasheet and Pin Diagram
Gate: QUAD 2-INPUT NOR GATE IC (UNIVERSAL GATE) | Circuit: 7402 | Configuration: 2 inputs and 1 output per gate (4 gates per IC)
The datasheet for 7402 IC Datasheet - NOR Gate Pin Configuration Truth Table (Circuito Integrado SN74LS02) 7402 provides complete technical information including pin diagram, electrical characteristics, truth table and typical applications of the integrated circuit.
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Boolean Function and Logic Operation
Output = NOT (A OR B)The boolean function mathematical expression defines how the output (Y or Q) of the 7402 NOR Gate IC Pin Diagram Datasheet IC depends on its inputs (A, B, etc.). Essential for digital circuit design and logic implementation.
Digital Electronics Applications
- Flip-flops
- Universal logic gate implementation
- Level detectors
- Memory circuits
- Logic inversion
These TTL logic gate integrated circuits are used in digital systems, microcontrollers, processors, and various digital electronics applications.
Complete Truth Table
The truth table shows all possible input combinations and corresponding logic outputs for the 7402 NOR Gate IC Pin Diagram Datasheet IC. Essential for understanding the integrated circuit behavior and pin configuration.
| Input A | Input B | output |
|---|---|---|
| 0 | 0 | 1 |
| 0 | 1 | 0 |
| 1 | 0 | 0 |
| 1 | 1 | 0 |
IC Technical Specifications and Electrical Characteristics
General IC Information
Quad 2-input NOR gate IC (Universal gate)
2 inputs and 1 output per gate (4 gates per IC)
Electrical Characteristics
4.75V - 5.25V
20mA
15ns typ
0°C to 70°C
IC Package and Pin Configuration
DIP-14
0.1" (2.54mm)
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.
The 7402 NOR Gate IC Pin Diagram Datasheet is a fundamental TTL integrated circuit in digital electronics. Its pin configuration is 2 inputs and 1 output per gate (4 gates per IC). The IC operation is based on the logic function Output.
The 74LS02 (also known as 7402) is a TTL integrated circuit that contains four independent two-input NOR (Negated-OR) logic gates. It is powered with +5V (4.75–5.25V), and each gate performs the Boolean operation Y = (A+B)'. The output is "1" (HIGH) only when both inputs are "0" (LOW). If at least one input is "1", the output will be "0".
Like the NAND gate, the NOR gate is a "universal gate," which means it can be used to build any other logic function (AND, OR, NOT, etc.), making it extremely versatile in digital circuit design.
What is the 74LS02?
The 74LS02 is a quad low-power NOR gate (LS series). Its main features are:
- Four independent two-input NOR gates.
- Low power consumption and high speed.
- Compatible with standard TTL logic levels (5V).
- It is a universal gate, a foundation for building other logic circuits.
Basic Operation and Truth Table
Each NOR gate in the 74LS02 functions as an OR gate followed by an inverter (NOT). The output is the negation of the result of an OR operation.
Truth table for each NOR gate:
| Input A | Input B | Output Y |
|---|---|---|
| 0 | 0 | 1 |
| 0 | 1 | 0 |
| 1 | 0 | 0 |
| 1 | 1 | 0 |
Pinout and Connections
Important: The pinout of the 74LS02 is different from other quad gates like the 7400 or 7408. The arrangement of inputs and outputs is unique.
- Pin 7: GND (Ground)
- Pin 14: VCC (+5V)
- Gates organized as follows:
- Gate 1: Output (Pin 1), Inputs (Pin 2, 3)
- Gate 2: Output (Pin 4), Inputs (Pin 5, 6)
- Gate 3: Output (Pin 10), Inputs (Pin 8, 9)
- Gate 4: Output (Pin 13), Inputs (Pin 11, 12)
Detailed Technical Specifications
| Specification | Parameter (74LS02) |
|---|---|
| Logic Function | NOR (Negated-OR) |
| Number of gates | 4 (Quad) |
| Inputs per gate | 2 |
| Supply Voltage | 4.75 – 5.25 V |
| Technology | TTL 74LS family (LS-TTL) |
| Output Current (IOL) | up to 8 mA (low level) |
| Output Current (IOH) | –0.4 mA (high level) |
| Typical Delay (tpd) | ~10 ns (propagation) |
| Operating Trange | 0 °C to 70 °C |
Component Variants
- SN7402/SN74LS02: TTL versions.
- SN74HC02: High-speed CMOS version, operates from 2V to 6V.
- SN74HCT02: CMOS version with TTL-compatible inputs.
Practical Applications and Universality
The NOR gate is universal, allowing you to create any other logic function:
- Inverter (NOT): By connecting the two inputs of a NOR gate together.
- OR Gate: Using a NOR gate followed by an inverter (another NOR with its inputs tied together).
- AND Gate: By inverting both inputs with two NOR gates and connecting their outputs to a third NOR gate.
Use cases:
- Control logic: Implementing any Boolean function using only one type of IC.
- Memory circuits: Base for building SR flip-flops.
- Safety systems: Activating an output only if all safety conditions are "0" (e.g., neither sensor A nor sensor B is active).
Practical Resources
- Datasheet SN74LS02 (Texas Instruments): [Quad 2-Input NOR Gates]
- Datasheet SN74HC02 (Texas Instruments): [Quad 2-Input NOR Gates - CMOS]
- Simulations: Tinkercad, Falstad, and other simulators are perfect for exploring the universality of the NOR gate.
Frequently Asked Questions (FAQ)
What gate is the 7402? The 7402 (or 74LS02) is an integrated circuit containing four two-input NOR logic gates.
What is the truth table for the 7402? The output is 1 only if both inputs are 0. If any of the inputs is 1, the output is 0.
What is the pinout of the 7402? The pinout is unique: VCC on pin 14, GND on pin 7. The outputs are on pins 1, 4, 10, and 13, with their respective inputs next to them.
What does the 7402 integrated circuit do? It performs the NOR (negated OR) logic operation. It is a universal gate, allowing any other logic function to be built from it.
What voltage does the 74LS02 operate at? It operates at a standard TTL voltage of 5V (range 4.75–5.25V).
What do SN74LS02, 74HC02, etc., mean? They are different logic families: 74LS02 (TTL Low-Power Schottky), 74HC02 (High-speed CMOS), and 74HCT02 (CMOS with TTL-compatible inputs). All perform the NOR function but with different electrical characteristics.
References: Information is based on official datasheets from Texas Instruments and digital electronics technical guides.
Additional Technical Information
To master the 7402 NOR Gate IC Pin Diagram Datasheet IC usage, study Boolean algebra, digital circuit design, and practice with circuit simulators. The datasheet provides complete technical specifications and pin configuration details.
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