CD74HCT21E

Product Overview

• Category: Integrated Circuit (IC)
• Use: Logic Gate
• Characteristics: High-speed, CMOS technology
• Package: DIP (Dual In-line Package)
• Essence: Dual 4-input AND gate
• Packaging/Quantity: Tube packaging, 25 pieces per tube

Specifications

• Supply Voltage Range: 2V to 6V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• Operating Temperature Range: -55°C to +125°C
• Propagation Delay Time: 15ns (typical)

Detailed Pin Configuration

The CD74HCT21E has a total of 14 pins. The pin configuration is as follows:

1. Pin 1: Input A1
2. Pin 2: Input B1
3. Pin 3: Input C1
4. Pin 4: Input D1
5. Pin 5: Ground (GND)
6. Pin 6: Output Y1
7. Pin 7: Output Y2
8. Pin 8: VCC (Positive Power Supply)
9. Pin 9: Output Y3
10. Pin 10: Output Y4
11. Pin 11: Input D2
12. Pin 12: Input C2
13. Pin 13: Input B2
14. Pin 14: Input A2

Functional Features

• Dual 4-input AND gate functionality
• High-speed operation due to HCT (High-Speed CMOS) technology
• Wide supply voltage range allows compatibility with various systems
• Low power consumption
• TTL (Transistor-Transistor Logic) compatible inputs

Advantages and Disadvantages

Advantages: - High-speed operation - Wide supply voltage range - Low power consumption - Compatibility with TTL inputs

Disadvantages: - Limited number of inputs (4 per gate) - Not suitable for applications requiring more complex logic functions

Working Principles

The CD74HCT21E is a dual 4-input AND gate that performs logical AND operations on its four input signals. It utilizes CMOS technology, which allows for high-speed operation and low power consumption. The gate operates by comparing the input signals and producing an output signal based on the logical AND function.

Detailed Application Field Plans

The CD74HCT21E can be used in various digital logic applications, including but not limited to:

1. Arithmetic circuits
2. Data processing systems
3. Control systems
4. Communication systems
5. Industrial automation

Detailed and Complete Alternative Models

1. SN74HCT21: Similar functionality and specifications, different package (SOIC)
2. MC74HCT21: Similar functionality and specifications, different manufacturer (Motorola)

These alternative models provide similar functionality to the CD74HCT21E and can be used as replacements depending on specific requirements and availability.

In conclusion, the CD74HCT21E is a high-speed CMOS integrated circuit belonging to the logic gate category. It is a dual 4-input AND gate with wide application possibilities in various digital logic systems. Its advantages include high-speed operation, wide supply voltage range, low power consumption, and compatibility with TTL inputs. However, it has a limited number of inputs and may not be suitable for complex logic functions.