SN74LS21DRG4

Product Overview

• Category: Integrated Circuit
• Use: Logic Gates
• Characteristics: Dual 4-input Positive-AND Gate
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: High-speed TTL logic gate
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 4.75V to 5.25V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay Time: 9 ns (typical)
• Power Dissipation: 22 mW (typical)

Detailed Pin Configuration

The SN74LS21DRG4 has a total of 14 pins arranged 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: Input D2
9. Pin 9: Input C2
10. Pin 10: Input B2
11. Pin 11: Input A2
12. Pin 12: VCC (+5V)
13. Pin 13: Output Y3
14. Pin 14: Output Y4

Functional Features

• Dual 4-input positive-AND gate
• Performs logical AND operation on four input signals
• Provides four output signals based on the input combinations
• High-speed operation suitable for various applications
• Compatible with TTL (Transistor-Transistor Logic) family

Advantages and Disadvantages

Advantages: - High-speed operation allows for quick signal processing - Dual 4-input configuration provides flexibility in logic operations - Compatible with other TTL devices, enabling easy integration into existing systems

Disadvantages: - Limited input voltage range (0V to VCC) - Requires a stable power supply within the specified voltage range

Working Principles

The SN74LS21DRG4 is a dual 4-input positive-AND gate that performs logical AND operation on four input signals. It utilizes TTL technology to achieve high-speed operation. The inputs are compared and the output signals are generated based on the logical AND operation. The device requires a stable power supply within the specified voltage range for proper functioning.

Detailed Application Field Plans

The SN74LS21DRG4 can be used in various applications that require logical AND operations. Some potential application fields include:

1. Digital circuit design: The device can be used to implement complex logic functions in digital circuits.
2. Data processing: It can be utilized in data processing systems to perform logical operations on input data.
3. Control systems: The gate can be employed in control systems to generate output signals based on specific input conditions.
4. Communication systems: It can be integrated into communication systems to process incoming signals and generate appropriate responses.

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to the SN74LS21DRG4 are:

1. SN74LS08DRG4: Quad 2-input Positive-AND Gate
2. SN74LS32DRG4: Quad 2-input Positive-OR Gate
3. SN74LS86DRG4: Quad 2-input Exclusive-OR Gate
4. SN74LS00DRG4: Quad 2-input Positive-NAND Gate

These alternative models provide different input configurations and logic operations, allowing users to choose the most suitable option for their specific requirements.

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