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DM74LS253N

DM74LS253N

Product Overview

  • Category: Integrated Circuit
  • Use: Multiplexer/Demultiplexer
  • Characteristics:
    • High-speed TTL logic
    • Dual 4-line to 1-line data selectors/multiplexers
    • Active-low enable inputs
  • Package: DIP (Dual In-line Package)
  • Essence: Logic IC for data selection and multiplexing
  • Packaging/Quantity: Available in tubes of 25 or reels of 2000 units

Specifications

  • Supply Voltage: 4.75V to 5.25V
  • Input Voltage: 0V to VCC
  • Output Voltage: 0V to VCC
  • Operating Temperature: 0°C to 70°C
  • Propagation Delay Time: 15ns (max)
  • Power Dissipation: 500mW (max)

Detailed Pin Configuration

The DM74LS253N has a total of 16 pins, which are assigned as follows:

  1. A0 - Data Input A0
  2. A1 - Data Input A1
  3. B0 - Data Input B0
  4. B1 - Data Input B1
  5. GND - Ground
  6. Y - Multiplexer Output
  7. E1 - Enable Input 1
  8. E2 - Enable Input 2
  9. VCC - Positive Power Supply
  10. C0 - Demultiplexer Output C0
  11. C1 - Demultiplexer Output C1
  12. D0 - Demultiplexer Output D0
  13. D1 - Demultiplexer Output D1
  14. F0 - Demultiplexer Output F0
  15. F1 - Demultiplexer Output F1
  16. VCC - Positive Power Supply

Functional Features

The DM74LS253N is a dual 4-line to 1-line data selector/multiplexer. It allows the selection of one out of four data inputs (A0, A1, B0, B1) based on the values of the enable inputs (E1, E2). When both enable inputs are high, the outputs are in a high-impedance state.

Advantages and Disadvantages

Advantages: - High-speed operation - Versatile multiplexing capability - Active-low enable inputs for easy control

Disadvantages: - Limited number of input lines - Requires external logic for more complex applications

Working Principles

The DM74LS253N works by using the enable inputs to control the selection of data inputs. When the enable inputs are active, the selected data input is passed through to the output. The active-low enable inputs allow for easy control and can be used in conjunction with other logic gates to create more complex circuits.

Detailed Application Field Plans

The DM74LS253N can be used in various applications, including: 1. Data multiplexing in digital systems 2. Address decoding in memory systems 3. Input selection in microprocessor-based systems 4. Control signal routing in communication systems

Detailed and Complete Alternative Models

Some alternative models to the DM74LS253N include: - SN74LS253N - CD74LS253N - MC74LS253N - HCF4053BE

These alternatives offer similar functionality and can be used as replacements depending on availability and specific requirements.

In conclusion, the DM74LS253N is a versatile dual 4-line to 1-line data selector/multiplexer integrated circuit. With its high-speed operation and active-low enable inputs, it finds applications in various digital systems, memory systems, and microprocessor-based systems. While it has some limitations in terms of input lines and complexity, there are alternative models available to suit different needs.

Перелічіть 10 типових запитань і відповідей, пов’язаних із застосуванням DM74LS253N у технічних рішеннях

  1. Question: What is DM74LS253N?
    Answer: DM74LS253N is a dual 4-input multiplexer with tri-state outputs, commonly used in digital logic circuits.

  2. Question: What is the purpose of DM74LS253N in technical solutions?
    Answer: DM74LS253N is used to select one of the four input signals and route it to the output based on the control inputs.

  3. Question: How many control inputs does DM74LS253N have?
    Answer: DM74LS253N has two control inputs, typically labeled as "G" and "C".

  4. Question: How many output pins does DM74LS253N have?
    Answer: DM74LS253N has two output pins, each corresponding to one of the selected input signals.

  5. Question: Can DM74LS253N handle both analog and digital signals?
    Answer: No, DM74LS253N is designed to work with digital signals only.

  6. Question: What is the maximum voltage that DM74LS253N can handle?
    Answer: DM74LS253N can handle a maximum voltage of 5V.

  7. Question: Can DM74LS253N be cascaded to increase the number of inputs?
    Answer: Yes, multiple DM74LS253N chips can be cascaded together to increase the number of inputs and outputs.

  8. Question: What is the power supply requirement for DM74LS253N?
    Answer: DM74LS253N requires a power supply voltage of 5V.

  9. Question: Does DM74LS253N have built-in protection against short circuits?
    Answer: No, DM74LS253N does not have built-in protection against short circuits. External measures should be taken to prevent short circuits.

  10. Question: Can DM74LS253N be used in both commercial and industrial applications?
    Answer: Yes, DM74LS253N is suitable for use in both commercial and industrial applications where digital signal routing is required.