ON Semiconductor
Bild kan vara representation.
Se specifikationer för produktinformation.
MC74VHC257DT
Visa detalj Datablad

MC74VHC257DT

Product Overview

  • Category: Integrated Circuit
  • Use: Data Selector/Multiplexer
  • Characteristics: High-speed, low-power, 2-input multiplexer
  • Package: SOIC-16
  • Essence: A versatile IC that allows selection of one of four data inputs based on the control inputs
  • Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

  • Supply Voltage Range: 2.0V 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 (typical)
  • Maximum Quiescent Current: 1 µA

Detailed Pin Configuration

The MC74VHC257DT has a total of 16 pins. The pin configuration is as follows:

  1. A Input 1
  2. B Input 1
  3. C Input 1
  4. D Input 1
  5. GND (Ground)
  6. Y Output
  7. E Input 2
  8. F Input 2
  9. G Input 2
  10. H Input 2
  11. Control Input 1
  12. Control Input 2
  13. Control Input 3
  14. Control Input 4
  15. VCC (Supply Voltage)
  16. NC (No Connection)

Functional Features

  • Four data inputs (A, B, C, D) and two control inputs (E, F) allow selection of one of the four data inputs based on the control inputs.
  • When both control inputs are low, the output is in a high-impedance state.
  • High-speed operation allows for efficient data selection.

Advantages and Disadvantages

Advantages: - High-speed operation enables quick data selection. - Low-power consumption makes it suitable for battery-powered devices. - Versatile multiplexer with multiple control inputs.

Disadvantages: - Limited number of data inputs (four). - May not be suitable for applications requiring a larger number of inputs.

Working Principles

The MC74VHC257DT is a 2-input multiplexer that selects one of the four data inputs based on the control inputs. When both control inputs are low, the output is in a high-impedance state. The selected data input is then passed to the output pin. The IC operates at high speed and consumes low power, making it suitable for various applications.

Detailed Application Field Plans

The MC74VHC257DT can be used in various applications, including but not limited to:

  1. Data routing and selection in digital systems
  2. Address decoding in memory systems
  3. Input selection in audio/video equipment
  4. Multiplexing control signals in communication systems
  5. Logic level conversion in mixed-signal circuits

Detailed and Complete Alternative Models

  1. SN74LVC257A: 2-input multiplexer with similar characteristics and package (SOIC-16)
  2. CD74HCT257E: 2-input multiplexer with different characteristics and package (PDIP-16)
  3. 74HC257: 2-input multiplexer with similar characteristics and package (SOIC-16)

These alternative models provide similar functionality and can be considered as substitutes for the MC74VHC257DT depending on specific requirements.

Word count: 399 words

Lista 10 Vanliga frågor och svar relaterade till tillämpningen av MC74VHC257DT i tekniska lösningar

Sure! Here are 10 common questions and answers related to the application of MC74VHC257DT in technical solutions:

  1. Q: What is MC74VHC257DT? A: MC74VHC257DT 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 MC74VHC257DT? A: The operating voltage range for MC74VHC257DT is typically between 2.0V and 5.5V.

  3. Q: What is the maximum output current that MC74VHC257DT can handle? A: MC74VHC257DT can handle a maximum output current of 8mA.

  4. Q: Can MC74VHC257DT be used as a demultiplexer? A: No, MC74VHC257DT is specifically designed as a multiplexer and does not function as a demultiplexer.

  5. Q: How many inputs does MC74VHC257DT have? A: MC74VHC257DT has four inputs, labeled A, B, C, and D.

  6. Q: What is the purpose of the 3-state outputs in MC74VHC257DT? A: The 3-state outputs allow the outputs to be disabled or put into a high-impedance state when not in use, preventing any interference with other components.

  7. Q: What is the propagation delay of MC74VHC257DT? A: The propagation delay of MC74VHC257DT is typically around 5ns.

  8. Q: Can MC74VHC257DT be cascaded to increase the number of inputs? A: Yes, multiple MC74VHC257DT chips can be cascaded together to increase the number of inputs.

  9. Q: What is the package type for MC74VHC257DT? A: MC74VHC257DT is available in a 16-pin SOIC (Small Outline Integrated Circuit) package.

  10. Q: Can MC74VHC257DT handle analog signals? A: No, MC74VHC257DT is designed to work with digital signals and is not suitable for handling analog signals.

Please note that these answers are general and may vary depending on the specific datasheet and manufacturer's specifications for MC74VHC257DT.