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MC74AC257N
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MC74AC257N

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Data Selector/Multiplexer
  • Characteristics: High-speed, low-power consumption
  • Package: DIP (Dual In-line Package)
  • Essence: Logic IC for data selection and multiplexing
  • Packaging/Quantity: Available in tubes of 25 or reels of 1000 units

Specifications

  • Logic Family: AC
  • Number of Inputs: 4
  • Number of Outputs: 1
  • Supply Voltage: 2V to 6V
  • Operating Temperature Range: -40°C to +85°C
  • Propagation Delay: 5ns (typical)
  • Output Current: ±24mA
  • Power Dissipation: 500mW

Detailed Pin Configuration

The MC74AC257N has a total of 16 pins. The pin configuration is as follows:

  1. GND (Ground)
  2. A1 (Input A1)
  3. B1 (Input B1)
  4. C1 (Input C1)
  5. D1 (Input D1)
  6. Y (Output Y)
  7. G1 (Enable Input G1)
  8. G2 (Enable Input G2)
  9. D2 (Input D2)
  10. C2 (Input C2)
  11. B2 (Input B2)
  12. A2 (Input A2)
  13. VCC (Positive Power Supply)
  14. NC (No Connection)
  15. NC (No Connection)
  16. GND (Ground)

Functional Features

The MC74AC257N is a quad 2-input multiplexer with non-inverting outputs. It allows the selection of one of four data inputs and routes it to a single output based on the control inputs. The device operates at high speed while consuming low power, making it suitable for various applications.

Advantages and Disadvantages

Advantages: - High-speed operation - Low-power consumption - Wide operating voltage range - Compact DIP package for easy integration

Disadvantages: - Limited number of inputs and outputs - Not suitable for applications requiring complex data routing

Working Principles

The MC74AC257N works based on the principle of multiplexing. It uses control inputs to select one of the four data inputs and routes it to the output. The selected input is then amplified and inverted to provide a non-inverted output signal.

Detailed Application Field Plans

The MC74AC257N can be used in various applications that require data selection and multiplexing. Some potential application fields include:

  1. Data communication systems
  2. Digital audio/video equipment
  3. Industrial automation
  4. Instrumentation and measurement devices
  5. Automotive electronics

Detailed and Complete Alternative Models

  1. SN74AC257: Similar functionality, different manufacturer (Texas Instruments)
  2. CD74AC257: Similar functionality, different package (SOIC)
  3. 74HC257: Lower power consumption, different logic family (HC)

These alternative models offer similar features and can be considered as substitutes for the MC74AC257N depending on specific requirements.

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10個與MC74AC257N在技術方案中應用相關的常見問題與解答

Sure! Here are 10 common questions and answers related to the application of MC74AC257N in technical solutions:

  1. Q: What is MC74AC257N? A: MC74AC257N is a quad 2-input multiplexer with 3-state outputs, commonly used in digital electronic circuits.

  2. Q: What is the purpose of MC74AC257N? A: MC74AC257N is used to select one of four data inputs and route it to the output based on control signals.

  3. Q: What is the voltage range supported by MC74AC257N? A: MC74AC257N supports a voltage range of 2V to 6V.

  4. Q: How many control inputs does MC74AC257N have? A: MC74AC257N has two control inputs, typically labeled as "A" and "B".

  5. Q: Can MC74AC257N handle high-speed data signals? A: Yes, MC74AC257N is designed to handle high-speed data signals with minimal propagation delay.

  6. Q: What is the maximum operating frequency of MC74AC257N? A: The maximum operating frequency of MC74AC257N is typically around 100 MHz.

  7. Q: Does MC74AC257N support 3-state outputs? A: Yes, MC74AC257N has 3-state outputs, allowing the output to be disconnected from the circuit when not needed.

  8. Q: Can MC74AC257N be cascaded to increase the number of inputs? A: Yes, multiple MC74AC257N chips can be cascaded together to increase the number of inputs and outputs.

  9. Q: Is MC74AC257N compatible with TTL logic levels? A: Yes, MC74AC257N is compatible with both TTL and CMOS logic levels.

  10. Q: What are some common applications of MC74AC257N? A: MC74AC257N is commonly used in data routing, signal multiplexing, address decoding, and bus switching applications.

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