SN74ALS21AD

Product Overview

• Category: Integrated Circuit (IC)
• Use: Logic Gate
• Characteristics: Dual 4-input AND gate
• Package: SOIC-14
• Essence: High-speed, low-power consumption logic gate
• Packaging/Quantity: Tape and Reel, 2500 pieces per reel

Specifications

• Supply Voltage Range: 4.5V to 5.5V
• Input Voltage Range: 0V to VCC
• Output Voltage Range: 0V to VCC
• Operating Temperature Range: -40°C to +85°C
• Propagation Delay Time: 9ns (typical)
• Power Dissipation: 22mW (typical)

Detailed Pin Configuration

The SN74ALS21AD has a total of 14 pins arranged 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. C1: Input C1
9. D1: Input D1
10. Y3: Output Y3
11. C2: Input C2
12. D2: Input D2
13. Y4: Output Y4
14. VCC: Supply Voltage

Functional Features

• Dual 4-input AND gate with independent inputs and outputs
• High-speed operation suitable for demanding applications
• Low power consumption for energy-efficient designs
• Wide supply voltage range allows compatibility with various systems
• TTL-compatible inputs for easy integration into existing circuits
• Open-drain outputs for flexible connectivity options

Advantages and Disadvantages

Advantages: - High-speed operation enables efficient data processing - Low power consumption reduces energy costs - Wide supply voltage range enhances compatibility - Independent inputs and outputs offer flexibility in circuit design

Disadvantages: - Limited number of inputs may restrict complex logic operations - Open-drain outputs require additional components for certain applications

Working Principles

The SN74ALS21AD is a dual 4-input AND gate that performs logical AND operations on its inputs. It utilizes transistor-transistor logic (TTL) technology to achieve high-speed operation while consuming low power. The gate operates by comparing the logical states of its input signals and producing an output signal based on the AND function. The open-drain outputs allow for easy connection to other devices or circuits.

Detailed Application Field Plans

The SN74ALS21AD can be used in various applications, including but not limited to:

1. Digital signal processing systems
2. Microcontrollers and microprocessors
3. Communication equipment
4. Industrial automation
5. Automotive electronics
6. Consumer electronics

Detailed and Complete Alternative Models

1. SN74ALS20A: Dual 4-input NAND gate
2. SN74ALS08: Quad 2-input AND gate
3. SN74ALS32: Quad 2-input OR gate
4. SN74ALS86: Quad 2-input XOR gate
5. SN74ALS74: Dual D-type flip-flop

These alternative models provide similar functionality to the SN74ALS21AD and can be considered as alternatives depending on specific requirements and design constraints.

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