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CD74ACT257E
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CD74ACT257E

Product Overview

Category

CD74ACT257E belongs to the category of integrated circuits (ICs).

Use

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

Characteristics

  • CD74ACT257E is a quad 2-input multiplexer with complementary outputs.
  • It operates on a wide voltage range, typically from 4.5V to 5.5V.
  • The IC has high-speed operation, making it suitable for applications requiring fast data switching.
  • It offers low power consumption, making it energy-efficient.
  • CD74ACT257E is designed to be compatible with TTL (Transistor-Transistor Logic) inputs.

Package

The CD74ACT257E IC is available in a standard 16-pin DIP (Dual In-line Package) format.

Essence

The essence of CD74ACT257E lies in its ability to efficiently multiplex and demultiplex data signals in digital systems.

Packaging/Quantity

The CD74ACT257E IC is typically sold in reels or tubes containing multiple units. The exact quantity may vary depending on the supplier.

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: 6ns (max)
  • Output Current: ±24mA

Detailed Pin Configuration

The CD74ACT257E IC has a total of 16 pins, each serving a specific function:

  1. A0: Input A0
  2. B0: Input B0
  3. C0: Input C0
  4. D0: Input D0
  5. GND: Ground
  6. Y0: Output Y0
  7. Y1: Output Y1
  8. Y2: Output Y2
  9. Y3: Output Y3
  10. C1: Input C1
  11. B1: Input B1
  12. A1: Input A1
  13. OE: Output Enable
  14. VCC: Supply Voltage
  15. D1: Input D1
  16. NC: No Connection

Functional Features

  • CD74ACT257E is a multiplexer/demultiplexer IC that allows the selection of one out of four data inputs and routes it to the output.
  • It features complementary outputs, providing both inverted and non-inverted signals.
  • The IC has an output enable pin (OE) that can be used to disable the outputs when not needed.
  • CD74ACT257E operates at high speeds, making it suitable for applications requiring rapid data switching.

Advantages and Disadvantages

Advantages

  • Wide voltage range compatibility
  • High-speed operation
  • Low power consumption
  • Complementary outputs for versatile signal routing

Disadvantages

  • Limited number of input/output channels (4:1)

Working Principles

CD74ACT257E works based on the principles of digital multiplexing and demultiplexing. It selects one of the four input data signals based on the control inputs and routes it to the output. The complementary outputs provide flexibility in signal routing, allowing for various applications.

Detailed Application Field Plans

CD74ACT257E finds applications in various digital systems, including but not limited to: - Data communication systems - Multiplexed data transmission - Address decoding circuits - Data routing and selection in microprocessors - Digital signal processing

Detailed and Complete Alternative Models

Some alternative models to CD74ACT257E include: - 74HC257: Similar functionality, but operates at a different voltage range (2V to 6V). - CD4051: Analog multiplexer/demultiplexer IC with more input/output channels (8:1).

These alternative models can be considered based on specific application requirements and compatibility with the existing system.

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技術ソリューションにおける CD74ACT257E 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。

Sure! Here are 10 common questions and answers related to the application of CD74ACT257E in technical solutions:

  1. Q: What is CD74ACT257E? A: CD74ACT257E is a quad 2-input multiplexer with 3-state outputs, commonly used in digital logic circuits.

  2. Q: What is the operating voltage range for CD74ACT257E? A: The operating voltage range for CD74ACT257E is typically between 4.5V and 5.5V.

  3. Q: How many inputs does CD74ACT257E have? A: CD74ACT257E has four inputs, labeled A0, A1, A2, and A3.

  4. Q: Can CD74ACT257E handle both analog and digital signals? A: No, CD74ACT257E is designed to handle only digital signals.

  5. Q: What is the purpose of the 3-state outputs in CD74ACT257E? A: The 3-state outputs allow multiple devices to share a common bus without interfering with each other.

  6. Q: What is the maximum frequency at which CD74ACT257E can operate? A: CD74ACT257E can typically operate at frequencies up to 125 MHz.

  7. Q: How can I select one of the four inputs using CD74ACT257E? A: The input selection is controlled by the two control inputs, labeled S0 and S1.

  8. Q: Can CD74ACT257E be cascaded to increase the number of inputs? A: Yes, multiple CD74ACT257E chips can be cascaded together to increase the number of inputs.

  9. Q: What is the output drive capability of CD74ACT257E? A: CD74ACT257E has a typical output drive capability of 24 mA.

  10. Q: Can CD74ACT257E be used in both commercial and industrial applications? A: Yes, CD74ACT257E 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 application requirements.