ON Semiconductor
画像はイメージの場合もございます。
商品詳細は仕様をご覧ください。
74ACT257SC
詳細を表示 DataSheets

74ACT257SC - English Editing Encyclopedia Entry

Product Overview

Category:

The 74ACT257SC belongs to the category of digital multiplexers.

Use:

It is used for data selection and routing in digital circuits.

Characteristics:

  • Low power consumption
  • High-speed operation
  • Wide operating voltage range

Package:

The 74ACT257SC comes in a standard 16-pin dual in-line package (DIP).

Essence:

This integrated circuit serves as a quad 2-input multiplexer, allowing for efficient data selection and routing within digital systems.

Packaging/Quantity:

The 74ACT257SC is typically packaged in tubes or reels and is available in quantities suitable for both prototyping and production applications.

Specifications

  • Operating Voltage Range: 2.0V to 6.0V
  • Input Voltage Range: 0V to VCC
  • Operating Temperature Range: -40°C to 85°C
  • Propagation Delay: 5ns (max) at 5V
  • Output Drive Capability: 24mA (min)

Detailed Pin Configuration

  1. A Select Input 1
  2. A Select Input 2
  3. Data Input 1
  4. Data Input 2
  5. Data Output
  6. Enable Input
  7. Ground
  8. Data Input 3
  9. Data Input 4
  10. B Select Input 1
  11. B Select Input 2
  12. Data Input 5
  13. Data Input 6
  14. VCC
  15. Data Input 7
  16. Data Input 8

Functional Features

  • Quad 2-input multiplexer
  • Non-inverting outputs
  • High-speed operation
  • Low power dissipation

Advantages

  • Versatile data selection capabilities
  • Wide operating voltage range
  • Fast propagation delay

Disadvantages

  • Limited number of input channels
  • Requires external enable signal for operation

Working Principles

The 74ACT257SC functions by selecting one of the four data inputs based on the combination of the select inputs. The selected data input is then routed to the output, providing a flexible means of data manipulation within digital systems.

Detailed Application Field Plans

The 74ACT257SC finds application in various digital systems, including: - Multiplexing data inputs in microcontroller-based systems - Address decoding in memory interfacing circuits - Data routing in communication equipment

Detailed and Complete Alternative Models

Some alternative models to the 74ACT257SC include: - 74HC257: Similar functionality with different electrical characteristics - SN74LS257: Lower power consumption but slower operation - CD74AC257: Higher operating temperature range

In conclusion, the 74ACT257SC is a versatile digital multiplexer offering high-speed operation and low power consumption, making it suitable for a wide range of digital system applications.

Word Count: 411

技術ソリューションにおける 74ACT257SC の適用に関連する 10 件の一般的な質問と回答をリストします。

  1. What is the 74ACT257SC?

    • The 74ACT257SC is a quad 2-input multiplexer with 3-state outputs, commonly used in digital electronic applications.

  2. What are the key features of the 74ACT257SC?

    • The 74ACT257SC features low power consumption, high-speed operation, and 3-state outputs, making it suitable for various digital applications.

  3. How does the 74ACT257SC function as a multiplexer?

    • The 74ACT257SC can select one of four data inputs and route it to a single output based on the control inputs, effectively functioning as a multiplexer.

  4. In what technical solutions is the 74ACT257SC commonly used?

    • The 74ACT257SC is frequently used in data acquisition systems, signal routing, and digital communication equipment due to its multiplexing capabilities.

  5. What are the voltage requirements for the 74ACT257SC?

    • The 74ACT257SC typically operates within a voltage range of 2V to 6V, making it compatible with a wide range of digital systems.

  6. Can the 74ACT257SC handle high-speed data signals?

    • Yes, the 74ACT257SC is designed for high-speed operation, making it suitable for applications requiring rapid data processing.

  7. How does the 3-state output feature benefit technical designs?

    • The 3-state output allows the 74ACT257SC to effectively disconnect from the bus, reducing the load on the system and enabling multiple devices to share the same bus.

  8. Are there any specific considerations for PCB layout when using the 74ACT257SC?

    • It's important to ensure proper decoupling capacitors and minimize trace lengths to maintain signal integrity when incorporating the 74ACT257SC into a PCB design.

  9. What are the temperature operating ranges for the 74ACT257SC?

    • The 74ACT257SC typically operates within a temperature range of -40°C to 85°C, making it suitable for both commercial and industrial applications.

  10. Can the 74ACT257SC be cascaded for larger multiplexing applications?

    • Yes, multiple 74ACT257SC devices can be cascaded to expand the number of input channels, providing flexibility for more complex multiplexing requirements.