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74ACT251SCX
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Encyclopedia Entry: 74ACT251SCX

Product Overview

Category

The 74ACT251SCX belongs to the category of integrated circuits (ICs).

Use

This IC is commonly used in digital electronic systems for data multiplexing applications.

Characteristics

  • The 74ACT251SCX is a quad 2-input multiplexer with three-state outputs.
  • It operates on a supply voltage range of 4.5V to 5.5V.
  • This IC offers high-speed performance and low power consumption.
  • It is designed to be compatible with TTL (Transistor-Transistor Logic) inputs.

Package

The 74ACT251SCX is available in a small outline package (SOIC) with 16 pins.

Essence

The essence of the 74ACT251SCX lies in its ability to select one of four data inputs and route it to a single output line based on the control inputs.

Packaging/Quantity

This IC is typically sold in reels or tubes, with a quantity of 250 units per reel/tube.

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: 6 ns (max)
  • Output Current: ±24 mA

Detailed Pin Configuration

The 74ACT251SCX has 16 pins, which are labeled as follows:

  1. A0 (Input)
  2. A1 (Input)
  3. B (Input)
  4. C (Input)
  5. G (Input)
  6. Y (Output)
  7. Y (Output)
  8. Y (Output)
  9. Y (Output)
  10. VCC (Power)
  11. A2 (Input)
  12. A3 (Input)
  13. Y (Output)
  14. Y (Output)
  15. Y (Output)
  16. GND (Ground)

Functional Features

  • Quad 2-input multiplexer: Allows selection of one out of four data inputs.
  • Three-state outputs: Enables the output to be in a high-impedance state when not selected.
  • TTL compatibility: Can interface with other TTL logic devices.

Advantages and Disadvantages

Advantages

  • High-speed performance: Suitable for applications requiring fast data switching.
  • Low power consumption: Helps conserve energy in electronic systems.
  • Compact package: The small outline package saves board space.

Disadvantages

  • Limited number of inputs: Only supports four data inputs.
  • Requires external control signals: Proper control signals are necessary for correct operation.

Working Principles

The 74ACT251SCX operates based on the principle of digital multiplexing. It selects one of the four input lines based on the control inputs (A0, A1, A2, A3) and routes the selected data to the output line (Y). The three-state outputs allow the IC to be effectively disconnected from the output line when not selected.

Detailed Application Field Plans

The 74ACT251SCX finds application in various digital electronic systems, including but not limited to: - Data communication systems - Multiplexing/demultiplexing circuits - Address decoding circuits - Data routing and selection circuits

Detailed and Complete Alternative Models

Some alternative models that can be considered as alternatives to the 74ACT251SCX are: - 74HC251: Similar functionality, but operates at a lower voltage range (2V to 6V). - CD4051: Analog multiplexer/demultiplexer with similar pin configuration. - SN54/74LS151: TTL multiplexer with similar pin configuration.

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

In conclusion, the 74ACT251SCX is a quad 2-input multiplexer IC that finds application in various digital electronic systems. Its high-speed performance, low power consumption, and compact package make it a suitable choice for data multiplexing applications.

Seznam 10 běžných otázek a odpovědí souvisejících s aplikací 74ACT251SCX v technických řešeních

Sure! Here are 10 common questions and answers related to the application of 74ACT251SCX in technical solutions:

  1. Q: What is the 74ACT251SCX? A: The 74ACT251SCX is a multiplexer (MUX) integrated circuit (IC) that allows multiple input signals to be selected and routed to a single output.

  2. Q: What is the maximum operating voltage for the 74ACT251SCX? A: The maximum operating voltage for the 74ACT251SCX is typically 5.5 volts.

  3. Q: How many inputs does the 74ACT251SCX have? A: The 74ACT251SCX has 8 inputs, labeled A0 to A7.

  4. Q: Can the 74ACT251SCX handle both analog and digital signals? A: No, the 74ACT251SCX is designed to handle digital signals only.

  5. Q: What is the purpose of the select inputs (S0, S1, S2) on the 74ACT251SCX? A: The select inputs determine which input signal is routed to the output. By setting the appropriate combination of select inputs, you can choose one of the eight inputs to be active.

  6. Q: What is the output configuration of the 74ACT251SCX? A: The 74ACT251SCX has a single output, labeled Y.

  7. Q: What is the typical propagation delay of the 74ACT251SCX? A: The typical propagation delay of the 74ACT251SCX is around 5 nanoseconds.

  8. Q: Can the 74ACT251SCX be cascaded to increase the number of inputs? A: Yes, multiple 74ACT251SCX ICs can be cascaded together to increase the number of inputs and select options.

  9. Q: What is the power supply voltage range for the 74ACT251SCX? A: The power supply voltage range for the 74ACT251SCX is typically between 4.5 volts and 5.5 volts.

  10. Q: Can the 74ACT251SCX be used in high-speed applications? A: Yes, the 74ACT251SCX is designed for high-speed operation and can be used in applications that require fast switching times.

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