ON Semiconductor
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DM74AS158N
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DM74AS158N

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Digital Multiplexer
  • Characteristics: High-speed, TTL-compatible, 2-to-1 multiplexer
  • Package: DIP (Dual In-line Package)
  • Essence: The DM74AS158N is a digital multiplexer IC that allows the selection of one out of two input signals to be routed to a single output line.
  • Packaging/Quantity: Available in tubes or reels, with varying quantities depending on the supplier.

Specifications

  • Logic Family: AS
  • Number of Inputs: 2
  • Number of Outputs: 1
  • Supply Voltage: 4.75V to 5.25V
  • Operating Temperature Range: -55°C to +125°C
  • Propagation Delay: 9ns (typical)
  • Output Current: ±8mA
  • Input Capacitance: 10pF
  • Power Dissipation: 500mW

Detailed Pin Configuration

The DM74AS158N has a total of 16 pins, which are assigned specific functions as follows:

  1. A Input 1
  2. B Input 2
  3. C Input Control
  4. Y Output
  5. GND Ground
  6. Y Output
  7. C Input Control
  8. B Input 2
  9. A Input 1
  10. VCC Power Supply

Functional Features

  • High-speed operation: The DM74AS158N is designed for high-speed digital applications, ensuring efficient signal routing.
  • TTL compatibility: It is compatible with TTL logic levels, allowing seamless integration with other TTL devices.
  • Low power consumption: The IC consumes low power, making it suitable for battery-powered applications.
  • Wide operating temperature range: It can operate reliably in extreme temperature conditions, ranging from -55°C to +125°C.

Advantages and Disadvantages

Advantages

  • High-speed operation enables quick signal routing.
  • TTL compatibility allows easy integration with other TTL devices.
  • Low power consumption makes it suitable for battery-powered applications.
  • Wide operating temperature range ensures reliability in extreme conditions.

Disadvantages

  • Limited number of inputs and outputs restricts its application to simple multiplexing tasks.
  • Availability may vary depending on the supplier and market demand.

Working Principles

The DM74AS158N operates based on the principle of digital multiplexing. It uses control signals to select one of the two input signals and routes it to the output line. The selection is controlled by the C input, which determines whether A or B will be passed through to the output Y.

Detailed Application Field Plans

The DM74AS158N finds applications in various fields where digital multiplexing is required. Some common application areas include:

  1. Data communication systems
  2. Digital audio/video equipment
  3. Industrial automation
  4. Telecommunications
  5. Test and measurement equipment

Detailed and Complete Alternative Models

  • SN74LS157: 2-to-1 Data Selector/Multiplexer IC
  • CD4053BE: Triple 2-channel Analog Multiplexer/Demultiplexer IC
  • MC14051B: 8-to-1 Line Data Selector/Multiplexer IC
  • 74HC151: 8-to-1 Data Selector/Multiplexer IC

These alternative models offer similar functionality to the DM74AS158N and can be used as substitutes depending on specific requirements.

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Перечислите 10 распространенных вопросов и ответов, связанных с применением DM74AS158N в технических решениях.

Sure! Here are 10 common questions and answers related to the application of DM74AS158N in technical solutions:

  1. Q: What is DM74AS158N? A: DM74AS158N is a specific type of integrated circuit (IC) that functions as a 4-line to 1-line data selector/multiplexer.

  2. Q: What is the purpose of DM74AS158N? A: The purpose of DM74AS158N is to select one of four input lines and route it to a single output line based on the control inputs.

  3. Q: What voltage levels does DM74AS158N support? A: DM74AS158N supports TTL (Transistor-Transistor Logic) voltage levels, typically operating at 5V.

  4. Q: How many control inputs does DM74AS158N have? A: DM74AS158N has two control inputs, usually labeled as "A" and "B", which determine the selected input line.

  5. Q: Can DM74AS158N be used for both digital and analog signals? A: No, DM74AS158N is designed specifically for digital signals and is not suitable for handling analog signals.

  6. Q: What is the maximum frequency at which DM74AS158N can operate? A: DM74AS158N can typically operate at frequencies up to 25 MHz.

  7. Q: How many output lines does DM74AS158N have? A: DM74AS158N has a single output line where the selected input is routed.

  8. Q: Can DM74AS158N be cascaded to increase the number of input lines? A: Yes, multiple DM74AS158N ICs can be cascaded together to increase the number of input lines and select multiple outputs.

  9. Q: What is the power supply requirement for DM74AS158N? A: DM74AS158N typically requires a 5V power supply.

  10. Q: Are there any specific precautions to consider when using DM74AS158N? A: It is important to ensure that the voltage levels of the input signals are compatible with the TTL levels supported by DM74AS158N. Additionally, proper decoupling capacitors should be used to minimize noise and stabilize the power supply.

Please note that these answers are general and may vary depending on the specific datasheet and manufacturer's recommendations for DM74AS158N.