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.