SN74LS38DR

Product Overview

• Category: Integrated Circuit (IC)
• Use: Logic Gate
• Characteristics: Quad 2-input NAND Buffer
• Package: SOIC (Small Outline Integrated Circuit)
• Essence: A logic gate that performs the NAND function on two inputs and provides buffering of the output signal.
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage Range: 4.75V to 5.25V
• High-Level Input Voltage: 2.0V (min), 7.0V (max)
• Low-Level Input Voltage: 0.8V (min), 0.8V (max)
• High-Level Output Voltage: 2.7V (min), VCC (max)
• Low-Level Output Voltage: 0.5V (min), 0.5V (max)
• Maximum Operating Frequency: 33MHz

Detailed Pin Configuration

The SN74LS38DR has a total of 14 pins, which are numbered as follows:

1. A Input 1
2. B Input 1
3. Y Output 1
4. GND (Ground)
5. Y Output 2
6. B Input 2
7. A Input 2
8. Y Output 3
9. VCC (Supply Voltage)
10. Y Output 4
11. C Input 1
12. D Input 1
13. Y Output 5
14. C Input 2

Functional Features

• Quad 2-input NAND gates with buffered outputs
• Schmitt-trigger input circuitry for noise immunity
• Wide supply voltage range for compatibility with various systems
• High-speed operation suitable for demanding applications
• TTL (Transistor-Transistor Logic) compatible inputs and outputs

Advantages and Disadvantages

Advantages: - Provides four NAND gates in a single package, saving board space - Schmitt-trigger input circuitry enhances noise immunity - Wide supply voltage range allows for compatibility with different systems - High-speed operation enables use in demanding applications

Disadvantages: - Limited to 2-input NAND functionality, may not be suitable for complex logic operations - Requires external pull-up resistors for open-drain outputs

Working Principles

The SN74LS38DR is based on the NAND gate logic function. It takes two inputs (A and B) and performs the logical NAND operation on them. The output of each NAND gate is then buffered to provide a clean and reliable signal. The Schmitt-trigger input circuitry ensures noise immunity by providing hysteresis.

Detailed Application Field Plans

The SN74LS38DR can be used in various applications that require NAND gate functionality, such as:

1. Digital logic circuits
2. Arithmetic circuits
3. Data processing systems
4. Control systems
5. Communication systems

Detailed and Complete Alternative Models

1. SN74LS00: Quad 2-input NAND Gate
2. SN74LS02: Quad 2-input NOR Gate
3. SN74LS04: Hex Inverter
4. SN74LS08: Quad 2-input AND Gate
5. SN74LS32: Quad 2-input OR Gate

These alternative models offer similar functionality to the SN74LS38DR and can be used as replacements depending on specific requirements.

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