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DM74AS257N
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DM74AS257N

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Data Multiplexer
  • Characteristics: High-speed, TTL-compatible, 2-to-1 multiplexer
  • Package: DIP (Dual In-line Package)
  • Essence: The DM74AS257N is a versatile data multiplexer that allows the selection of one of two input data sources and routes it to the output. It is commonly used in digital systems for data routing and selection purposes.
  • Packaging/Quantity: The DM74AS257N is typically sold in packs of 10.

Specifications

  • Logic Family: AS
  • Number of Inputs: 2
  • Number of Outputs: 1
  • Supply Voltage: 5V
  • Operating Temperature Range: -55°C to +125°C
  • Propagation Delay: 9ns (typical)
  • Output Current: ±8mA
  • Power Dissipation: 500mW (max)

Pin Configuration

The DM74AS257N has a 16-pin Dual In-line Package (DIP). The pin configuration is as follows:

+---+--+---+ A1 -|1 +--+ 16|- VCC B1 -|2 15|- Y A2 -|3 14|- B B2 -|4 13|- C G1 -|5 12|- G2 OE1 -|6 11|- OE2 Y1 -|7 10|- C1 Y2 -|8 9|- C2 +----------+

Functional Features

  • High-speed operation: The DM74AS257N provides fast data routing capabilities with a typical propagation delay of 9ns.
  • TTL-compatible inputs: The IC is designed to be compatible with TTL logic levels, making it easy to integrate into existing digital systems.
  • Versatile data selection: It allows the selection of one of two input data sources and routes it to the output based on the control signals.

Advantages and Disadvantages

Advantages: - High-speed operation enables efficient data routing in time-critical applications. - TTL compatibility simplifies integration into existing digital systems. - Versatile data selection capability provides flexibility in system design.

Disadvantages: - Limited number of inputs and outputs restricts its application in complex systems requiring multiple data sources.

Working Principles

The DM74AS257N operates based on the principles of multiplexing. It has two data inputs (A and B) and one output (Y). The control inputs (C1 and C2) determine which data input is selected and routed to the output. When the control inputs are set accordingly, the selected data input appears at the output.

Application Field Plans

The DM74AS257N finds applications in various digital systems where data routing and selection are required. Some common application fields include:

  1. Data communication systems
  2. Digital signal processing
  3. Multiplexed data transmission
  4. Memory address decoding
  5. Arithmetic logic units (ALUs)
  6. Control unit design

Alternative Models

Here are some alternative models that provide similar functionality to the DM74AS257N:

  1. SN74LS157N
  2. CD4052BE
  3. MC14052BCP
  4. 74HC157N
  5. 74F157AN

These models can be considered as alternatives depending on specific requirements and availability.

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Luettele 10 yleistä kysymystä ja vastausta, jotka liittyvät DM74AS257N :n soveltamiseen teknisissä ratkaisuissa

Sure! Here are 10 common questions and answers related to the application of DM74AS257N in technical solutions:

  1. Q: What is DM74AS257N? A: DM74AS257N is a quad 2-input multiplexer with tri-state outputs, commonly used in digital logic circuits.

  2. Q: What is the purpose of DM74AS257N? A: The purpose of DM74AS257N is to select one of four data inputs and route it to a single output based on the control inputs.

  3. Q: What is the operating voltage range for DM74AS257N? A: The operating voltage range for DM74AS257N is typically between 4.75V and 5.25V.

  4. Q: How many control inputs does DM74AS257N have? A: DM74AS257N has two control inputs, usually labeled as "A" and "B".

  5. Q: What is the maximum frequency at which DM74AS257N can operate? A: DM74AS257N can typically operate at a maximum frequency of around 25 MHz.

  6. Q: Can DM74AS257N handle both analog and digital signals? A: No, DM74AS257N is designed to handle only digital signals.

  7. Q: What is the output configuration of DM74AS257N? A: DM74AS257N has four tri-state outputs, allowing the selected input to be routed to any one of the outputs.

  8. Q: Can DM74AS257N be cascaded to increase the number of inputs? A: Yes, multiple DM74AS257N chips can be cascaded together to increase the number of inputs and outputs.

  9. Q: What is the power consumption of DM74AS257N? A: The power consumption of DM74AS257N is typically around 40mW.

  10. Q: Can DM74AS257N be used in both commercial and industrial applications? A: Yes, DM74AS257N is suitable for use in both commercial and industrial applications due to its wide operating temperature range and robustness.

Please note that the answers provided here are general and may vary depending on specific datasheet specifications and manufacturer guidelines.