The 7402 IC is a versatile digital logic integrated circuit that contains four independent 2-input NOR gates. Each gate within the IC operates independently, allowing for flexible use in a variety of logic circuit configurations. This makes the 7402 IC a versatile component in digital electronics, particularly suitable for implementing complex logic functions by combining multiple NOR gates in different configurations.
This article will introduce the Truth Table, pin assignment and information, Dimension and its equivalent model of the IC 7402 chip based on the 7402 datasheet. Let you make better choices in electronic projects.
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What is 7402 IC
The 7402 IC is a digital logic integrated circuit that belongs to the 7400 series of TTL (Transistor-Transistor Logic) chips. Specifically, the 7402 contains four independent 2-input NOR gates. Each gate performs the logical NOR operation, which outputs true only when all inputs are false. This IC is commonly used in digital circuits for combining signals that perform logical operations. Its standard 14-pin DIP (Dual In-line Package) makes it suitable for breadboard use and prototyping in digital electronics.
7402 IC Chip
7402 IC Chip Features
Here are the main features of the 7402 IC:
The 7402 IC consists of four independent 2-input NOR gates.
It is commonly available in a 14-pin Dual In-line Package (DIP), which is convenient for breadboarding and prototyping.
Typically, it operates at a voltage range of 4.75V to 5.25V, which is standard for TTL devices.
The IC has a low power consumption, which is typical for TTL logic chips, making it suitable for battery-operated devices.
It can drive up to 10 TTL loads, which indicates how many inputs of other TTL logic gates it can drive.
The propagation delay, which is the time it takes for an input change to affect the output, is relatively low, making it suitable for applications requiring quick response times.
7402 IC Diagram
The following figure shows the 7402 IC pin configuration diagram:
IC 7402 Pin Diagram
7402 Pinout Description
The 7402 IC is a digital logic integrated circuit that contains four independent 2-input NOR gates. Here's a detailed pinout description for the 7402 IC:
Pin 1 and Pin 2: These are the inputs for the first NOR gate.
Pin 3: This is the output for the first NOR gate.
Pin 4 and Pin 5: These are the inputs for the second NOR gate.
Pin 6: This is the output for the second NOR gate.
Pin 7: This pin should be connected to the ground (GND).
Pin 8: This is the output for the third NOR gate.
Pin 9 and Pin 10: These are the inputs for the third NOR gate.
Pin 11: This is the output for the fourth NOR gate.
Pin 12 and Pin 13: These are the inputs for the fourth NOR gate.
Pin 14: This pin should be connected to the positive supply voltage (Vcc), typically +5V.
Each pair of input pins (1 & 2, 4 & 5, 9 & 10, 12 & 13) corresponds to a NOR gate, and the adjacent pin (3, 6, 8, 11) is its output. The configuration allows for easy implementation of NOR logic in various digital circuits.
7402 IC Truth Table
The 7402 IC, which contains four independent 2-input NOR gates, has a specific truth table that defines the output for each combination of inputs for each gate. Here is the truth table for a single 2-input NOR gate, which you can apply to each of the four gates in the 7402 IC:
IC 7402 Truth Table| Input A | Input B | Output Y
|
|---|
| 0 | 0 | 1 |
| 0 | 1 | 0 |
| 1 | 0 | 0 |
| 1 | 1 | 0 |
IC 7432 Dimension
The size information of the 7432 IC is as follows:
7402 Dimensional Chart
7402 IC Equivalent Name
Equivalent names for the 7402 IC include: SN7402, SN74LS02, SN74S02, SN74HC02, 74HCT02, SN7402N and DM7402N. Here's a list of some of the equivalent names and variants of the 7402 IC:
SN7402
This is the standard version of the 7402 IC, containing four 2-input NOR gates.
It operates with a typical power supply voltage of 5V.
It is designed for general digital logic applications requiring NOR gate operations.
SN7402N
TI SN7402N IC
Another naming convention for the standard SN7402, typically indicating a specific package type or series.
SN74LS02
SN74LS02N IC
The "LS" in SN74LS02 stands for "Low Power Schottky". This variant is part of the Low Power Schottky series which is known for lower power consumption and faster operation than the standard TTL series.
It also contains four 2-input NOR gates.
The SN74LS02 is suitable for applications where power efficiency and higher speed are crucial.
SN74S02
The "S" in SN74S02 indicates that this variant belongs to the Schottky series, which is designed for high-speed performance.
Like the others, it features four 2-input NOR gates.
This version is optimized for applications requiring very high-speed operations.
SN74HC02
SN74HC02N IC
This variant belongs to the High-Speed CMOS (HC) family. It also features four 2-input NOR gates.
It offers the advantage of high noise immunity and low power consumption typical of CMOS devices, while maintaining speed comparable to LS-TTL gates.
74HCT02
74HCT02N IC
This variant belongs to the High-Speed CMOS (HC) family. It also features four 2-input NOR gates.
It offers the advantage of high noise immunity and low power consumption typical of CMOS devices, while maintaining speed comparable to LS-TTL gates.
DM7402N
Similar to SN7402N, often used to denote a specific manufacturer's version or package type.
7402 Datasheet PDF
Nantian Electronics provides relevant 7402 IC datasheet for download:
Frequently Asked Questions
1. How does the power consumption vary among different 7402 models?
The power consumption varies depending on the specific model of the 7402 IC. For example, the LS (Low Power Schottky) version typically consumes less power compared to the standard version, making it more suitable for power-sensitive applications.
2. What are the different versions of the 7402 IC?
There are several versions of the 7402 IC, including SN7402, SN74LS02, SN74S02, SN74HC02, and 74HCT02.
3. What is a 7402 IC?
The 7402 IC is a digital logic integrated circuit that consists of four independent 2-input NOR gates. It is part of the TTL (Transistor-Transistor Logic) family, making it suitable for various digital logic applications.
4. What is 7402 IC used for?
The 7402 IC is commonly used in digital circuits for implementing logic functions. Common applications include: Logic Gates Configuration, Combination and Sequential Logic Circuits, Control Systems, Debouncing Switches and Oscillators and Timers.