SN74HC21NSR

Product Overview

• Category: Integrated Circuit
• Use: Logic Gate
• Characteristics: Dual 4-input AND gate
• Package: SOIC-14
• Essence: High-speed CMOS technology
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage: 2V to 6V
• Input Voltage: 0V to VCC
• Output Voltage: 0V to VCC
• Operating Temperature: -40°C to +85°C
• Propagation Delay: 9 ns (typical)
• Quiescent Current: 2 µA (maximum)

Pin Configuration

The SN74HC21NSR has a total of 14 pins. The pin configuration is as follows:

1. A1 - Input A1
2. B1 - Input B1
3. Y1 - Output Y1
4. A2 - Input A2
5. B2 - Input B2
6. Y2 - Output Y2
7. GND - Ground
8. Y3 - Output Y3
9. B3 - Input B3
10. A3 - Input A3
11. Y4 - Output Y4
12. B4 - Input B4
13. A4 - Input A4
14. VCC - Supply Voltage

Functional Features

• Dual 4-input AND gate with independent inputs
• High-speed operation due to CMOS technology
• Low power consumption
• Wide operating voltage range
• Schmitt-trigger input allows for noisy signal handling
• Compatible with TTL logic levels

Advantages and Disadvantages

Advantages

• High-speed operation enables efficient data processing
• Low power consumption reduces energy usage
• Wide operating voltage range allows for versatile applications
• Schmitt-trigger input ensures reliable operation in noisy environments
• Compatibility with TTL logic levels simplifies integration with existing systems

Disadvantages

• Limited to AND gate functionality, may not be suitable for all logic operations
• Propagation delay of 9 ns may impact timing-sensitive applications

Working Principles

The SN74HC21NSR is a dual 4-input AND gate that performs logical AND operations on its inputs. It utilizes high-speed CMOS technology, which enables fast data processing. The Schmitt-trigger input ensures reliable operation even in the presence of noisy signals. The device operates within a wide voltage range and consumes low power, making it suitable for various applications.

Detailed Application Field Plans

The SN74HC21NSR can be used in a wide range of applications, including:

1. Digital signal processing
2. Data communication systems
3. Microcontroller-based projects
4. Industrial automation
5. Robotics
6. Automotive electronics
7. Consumer electronics

Detailed and Complete Alternative Models

Some alternative models that provide similar functionality to the SN74HC21NSR are:

1. CD4082BE - Dual 4-input AND gate, DIP-14 package
2. MC14082B - Dual 4-input AND gate, SOIC-14 package
3. 74HCT21 - Dual 4-input AND gate, DIP-14 package
4. CD4073B - Triple 3-input AND gate, SOIC-14 package
5. SN74LS21N - Dual 4-input AND gate, DIP-14 package

These alternative models offer different packaging options and may have slight variations in specifications, but they serve the same purpose as the SN74HC21NSR.

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