Texas Instruments
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74ACT11257NG4
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Encyclopedia Entry: 74ACT11257NG4

Product Information Overview

Category: Integrated Circuit (IC)

Use: The 74ACT11257NG4 is a quad 2-input multiplexer with 3-state outputs. It is commonly used in digital electronic systems for data routing and selection purposes.

Characteristics: - High-speed operation - Low power consumption - Wide operating voltage range - 3-state outputs for bus-oriented applications

Package: The 74ACT11257NG4 is available in a 24-pin DIP (Dual In-line Package) format, which allows for easy integration into circuit boards.

Essence: This IC serves as a versatile multiplexer, enabling efficient data routing and selection within digital systems.

Packaging/Quantity: The 74ACT11257NG4 is typically sold in reels or tubes, containing multiple units per package. The exact quantity may vary depending on the supplier.

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: 6ns (max)
  • Output Current: ±24mA

Detailed Pin Configuration

The 74ACT11257NG4 features a 24-pin configuration. Here is a detailed pinout description:

  1. A0: Input A0
  2. B0: Input B0
  3. Y0: Output Y0
  4. G1: Enable Input G1
  5. A1: Input A1
  6. B1: Input B1
  7. Y1: Output Y1
  8. G2: Enable Input G2
  9. Y2: Output Y2
  10. A2: Input A2
  11. B2: Input B2
  12. G3: Enable Input G3
  13. Y3: Output Y3
  14. VCC: Positive Power Supply
  15. GND: Ground
  16. Y4: Output Y4
  17. A3: Input A3
  18. B3: Input B3
  19. G4: Enable Input G4
  20. Y5: Output Y5
  21. A4: Input A4
  22. B4: Input B4
  23. Y6: Output Y6
  24. Y7: Output Y7

Functional Features

The 74ACT11257NG4 offers the following functional features:

  • Quad 2-input multiplexer with 3-state outputs
  • Allows selection of one out of four data inputs (A0-A3, B0-B4) through the enable inputs (G1-G4)
  • Outputs (Y0-Y7) can be put in a high-impedance state using the enable inputs
  • High-speed operation enables efficient data routing and selection within digital systems
  • Low power consumption makes it suitable for battery-powered devices
  • Wide operating voltage range ensures compatibility with various power supply configurations

Advantages and Disadvantages

Advantages: - High-speed operation allows for efficient data processing - Low power consumption extends battery life in portable devices - Versatile 3-state outputs facilitate bus-oriented applications - Wide operating voltage range enhances compatibility

Disadvantages: - Limited number of input/output channels compared to larger multiplexers - Propagation delay may impact real-time applications with strict timing requirements

Working Principles

The 74ACT11257NG4 operates based on the principles of digital logic. It utilizes multiplexing techniques to select and route data from multiple inputs to specific outputs. The enable inputs (G1-G4) control the selection of data inputs (A0-A3, B0-B4), and the outputs (Y0-Y7) provide the selected data.

When an enable input is active (low), the corresponding data inputs are connected to the outputs. When an enable input is inactive (high), the outputs enter a high-impedance state, effectively disconnecting them from the data inputs.

Detailed Application Field Plans

The 74ACT11257NG4 finds applications in various digital electronic systems, including but not limited to:

  1. Data routing and selection in microcontrollers and microprocessors
  2. Address decoding in memory systems
  3. Bus switching in communication interfaces
  4. Input/output expansion in embedded systems
  5. Multiplexing in data acquisition systems

Detailed and Complete Alternative Models

Here are some alternative models that offer similar functionality to the 74ACT11257NG4:

  1. SN74ALS257N
  2. CD4052BE
  3. MC14551BCP
  4. 74HC157N
  5. CD74HCT157E

These

Énumérez 10 questions et réponses courantes liées à l'application de 74ACT11257NG4 dans les solutions techniques

Sure! Here are 10 common questions and answers related to the application of 74ACT11257NG4 in technical solutions:

  1. Q: What is the 74ACT11257NG4? A: The 74ACT11257NG4 is a quad 2-input multiplexer with 3-state outputs, commonly used in digital logic circuits.

  2. Q: What is the purpose of a multiplexer? A: A multiplexer is used to select one of several input signals and route it to a single output line.

  3. Q: How many inputs does the 74ACT11257NG4 have? A: The 74ACT11257NG4 has four independent 2-input multiplexers, allowing for a total of eight input signals.

  4. Q: Can the 74ACT11257NG4 handle both analog and digital signals? A: No, the 74ACT11257NG4 is designed specifically for digital signals and is not suitable for handling analog signals.

  5. Q: What is the voltage range supported by the 74ACT11257NG4? A: The 74ACT11257NG4 operates with a voltage range of 2V to 6V.

  6. Q: How does the 74ACT11257NG4 handle multiple input signals? A: The 74ACT11257NG4 uses control inputs to select which input signal is routed to the output.

  7. Q: Can the 74ACT11257NG4 drive high-current loads? A: Yes, the 74ACT11257NG4 has 3-state outputs that can drive high-current loads.

  8. Q: What is the propagation delay of the 74ACT11257NG4? A: The propagation delay of the 74ACT11257NG4 is typically around 5ns.

  9. Q: Can the 74ACT11257NG4 be cascaded to increase the number of inputs? A: Yes, multiple 74ACT11257NG4 chips can be cascaded together to increase the number of input signals.

  10. Q: What are some common applications of the 74ACT11257NG4? A: The 74ACT11257NG4 is commonly used in data multiplexing, bus switching, and signal routing applications in digital systems.

Please note that these answers are general and may vary depending on specific application requirements.