ON Semiconductor
Bild kan vara representation.
Se specifikationer för produktinformation.
MC74VHC257DR2
Visa detalj Datablad

MC74VHC257DR2

Product Overview

Category

MC74VHC257DR2 belongs to the category of integrated circuits (ICs).

Use

It is commonly used in digital logic applications.

Characteristics

  • High-speed operation
  • Low power consumption
  • Wide operating voltage range
  • Compatibility with TTL inputs
  • Schmitt trigger action on all inputs

Package

MC74VHC257DR2 is available in a small outline package (SOIC) with 16 pins.

Essence

The essence of MC74VHC257DR2 lies in its ability to perform multiplexing functions in digital systems efficiently.

Packaging/Quantity

MC74VHC257DR2 is typically packaged in reels, with each reel containing a specific quantity of ICs. The exact quantity may vary depending on the manufacturer's specifications.

Specifications

  • Supply Voltage: 2.0V to 5.5V
  • Input Voltage: -0.5V to VCC + 0.5V
  • Output Voltage: -0.5V to VCC + 0.5V
  • Operating Temperature Range: -40°C to +85°C
  • Logic Family: VHC
  • Number of Inputs: 4
  • Number of Outputs: 1

Detailed Pin Configuration

MC74VHC257DR2 has a total of 16 pins, which are assigned specific functions as follows:

  1. A0: Input A0
  2. A1: Input A1
  3. A2: Input A2
  4. A3: Input A3
  5. GND: Ground
  6. Y: Output Y
  7. OE: Output Enable
  8. B0: Input B0
  9. B1: Input B1
  10. B2: Input B2
  11. B3: Input B3
  12. VCC: Power Supply
  13. C0: Input C0
  14. C1: Input C1
  15. C2: Input C2
  16. C3: Input C3

Functional Features

MC74VHC257DR2 offers the following functional features:

  • 4-to-1 multiplexing capability
  • Schmitt trigger action on all inputs for noise immunity
  • Output enable control for easy integration into larger systems
  • Wide operating voltage range allows compatibility with various power supply levels

Advantages and Disadvantages

Advantages

  • High-speed operation enables efficient data processing
  • Low power consumption helps in reducing energy usage
  • Compatibility with TTL inputs allows seamless integration with existing systems
  • Schmitt trigger action on all inputs enhances noise immunity

Disadvantages

  • Limited number of inputs and outputs restricts its application in complex systems requiring higher channel counts
  • Lack of built-in protection features may make it susceptible to damage from voltage spikes or electrostatic discharge

Working Principles

MC74VHC257DR2 operates based on the principles of digital logic. It takes multiple input signals and selects one of them based on the control signal (OE). The selected input is then routed to the output pin (Y). The device operates at high speeds, ensuring efficient multiplexing of data.

Detailed Application Field Plans

MC74VHC257DR2 finds applications in various fields, including but not limited to:

  1. Data communication systems
  2. Industrial automation
  3. Automotive electronics
  4. Consumer electronics
  5. Medical devices

In data communication systems, MC74VHC257DR2 can be used for multiplexing different data streams onto a single transmission line. In industrial automation, it can be employed for selecting different sensor inputs based on control signals. In automotive electronics, it can be utilized for routing signals from various sensors to the central processing unit. In consumer electronics, it can be integrated into audio/video equipment for signal selection. In medical devices, it can be used for multiplexing different sensor inputs in patient monitoring systems.

Detailed and Complete Alternative Models

Some alternative models that offer similar functionality to MC74VHC257DR2 include:

  1. 74HC257: This IC is part of the HC logic family and provides 4-to-1 multiplexing capability.
  2. CD4051: It is a CMOS analog multiplexer/demultiplexer IC with 8 channels.
  3. SN74LS157: This TTL logic IC offers 2-to-1 multiplexing capability with 4 inputs and 1 output.

These alternative models can be considered based on specific requirements, compatibility, and availability.

In conclusion, MC74VHC257DR2 is a versatile integrated circuit that enables efficient multiplexing in digital systems. Its high-speed operation, low power consumption, and wide operating voltage range make it suitable for various applications. However, its limited number of inputs and outputs may restrict its use in complex systems

Lista 10 Vanliga frågor och svar relaterade till tillämpningen av MC74VHC257DR2 i tekniska lösningar

Sure! Here are 10 common questions and answers related to the application of MC74VHC257DR2:

  1. Q: What is MC74VHC257DR2? A: MC74VHC257DR2 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 MC74VHC257DR2? A: The operating voltage range for MC74VHC257DR2 is typically between 2.0V and 5.5V.

  3. Q: What is the maximum output current that MC74VHC257DR2 can handle? A: MC74VHC257DR2 can handle a maximum output current of 8mA.

  4. Q: Can MC74VHC257DR2 be used in high-speed applications? A: Yes, MC74VHC257DR2 is designed for high-speed operation and can be used in such applications.

  5. Q: How many inputs does MC74VHC257DR2 have? A: MC74VHC257DR2 has four inputs, labeled A, B, C, and D.

  6. Q: What is the purpose of the 3-state outputs in MC74VHC257DR2? A: The 3-state outputs allow the device to be connected to a bus or shared line without interfering with other devices on the same line.

  7. Q: Can MC74VHC257DR2 be used in both CMOS and TTL logic systems? A: Yes, MC74VHC257DR2 is compatible with both CMOS and TTL logic systems.

  8. Q: What is the typical propagation delay of MC74VHC257DR2? A: The typical propagation delay of MC74VHC257DR2 is around 5ns.

  9. Q: Can MC74VHC257DR2 be used in battery-powered applications? A: Yes, MC74VHC257DR2 can be used in battery-powered applications due to its low power consumption.

  10. Q: Are there any specific precautions to consider when using MC74VHC257DR2? A: It is important to ensure that the voltage levels applied to the inputs and outputs of MC74VHC257DR2 are within the specified operating range to prevent damage to the device.

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