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MC74LVX244MEL
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MC74LVX244MEL

Overview

Category: Integrated Circuit (IC)

Use: Logic Level Shifter

Characteristics: - High-speed CMOS technology - Wide voltage range compatibility - Low power consumption - Schmitt trigger inputs for noise immunity - 3-state outputs for bus-oriented applications

Package: SOIC-20

Essence: The MC74LVX244MEL is a logic level shifter IC that allows bidirectional voltage level translation between different logic levels. It is commonly used in digital systems where signals need to be shifted from one voltage level to another.

Packaging/Quantity: The MC74LVX244MEL is available in a small outline integrated circuit (SOIC) package with 20 pins. It is typically sold in reels or tubes containing multiple units.

Specifications

  • Supply Voltage Range: 2.0V to 5.5V
  • Input Voltage Range: 0V to VCC
  • Output Voltage Range: 0V to VCC
  • Maximum Input Current: ±10mA
  • Maximum Output Current: ±24mA
  • Propagation Delay Time: 7ns (typical)
  • Operating Temperature Range: -40°C to +85°C

Pin Configuration

The MC74LVX244MEL has a total of 20 pins, which are assigned specific functions as follows:

  1. A1 - Input/Output Pin
  2. Y1 - Output Pin
  3. A2 - Input/Output Pin
  4. Y2 - Output Pin
  5. GND - Ground Pin
  6. Y3 - Output Pin
  7. A3 - Input/Output Pin
  8. Y4 - Output Pin
  9. A4 - Input/Output Pin
  10. GND - Ground Pin
  11. Y5 - Output Pin
  12. A5 - Input/Output Pin
  13. Y6 - Output Pin
  14. A6 - Input/Output Pin
  15. GND - Ground Pin
  16. Y7 - Output Pin
  17. A7 - Input/Output Pin
  18. Y8 - Output Pin
  19. OE - Output Enable Pin
  20. VCC - Power Supply Pin

Functional Features

  • Bidirectional voltage level shifting: Allows translation between different logic levels, enabling compatibility between devices operating at different voltage levels.
  • High-speed operation: Utilizes high-speed CMOS technology, ensuring fast signal propagation and response times.
  • Wide voltage range compatibility: Supports a wide supply voltage range from 2.0V to 5.5V, making it suitable for various digital systems.
  • Noise immunity: Incorporates Schmitt trigger inputs that provide noise immunity by reducing the effects of input signal fluctuations.
  • 3-state outputs: The 3-state outputs allow multiple devices to share a common bus, enabling efficient bus-oriented applications.

Advantages and Disadvantages

Advantages: - Enables seamless voltage level translation between different logic levels. - Low power consumption, making it suitable for battery-powered devices. - Wide voltage range compatibility allows for versatile use in various digital systems. - Schmitt trigger inputs provide noise immunity, enhancing signal integrity. - 3-state outputs facilitate efficient bus-oriented applications.

Disadvantages: - Limited number of pins may restrict the number of signals that can be translated simultaneously. - Propagation delay time may affect the timing requirements in certain applications. - Not suitable for high-voltage applications beyond the specified voltage range.

Working Principles

The MC74LVX244MEL operates based on the principles of CMOS logic. It utilizes a combination of NMOS (N-channel Metal-Oxide-Semiconductor) and PMOS (P-channel Metal-Oxide-Semiconductor) transistors to achieve bidirectional voltage level shifting. The input signals are translated to the desired output voltage levels based on the logic levels applied to the control pins.

Detailed Application Field Plans

The MC74LVX244MEL finds applications in various digital systems where voltage level translation is required. Some common application fields include:

  1. Microcontrollers and microprocessors: Enables communication between devices operating at different logic levels.
  2. Communication interfaces: Facilitates signal translation between different voltage domains in UART, SPI, I2C, and other serial communication protocols.
  3. Sensor interfacing: Allows connection of sensors operating at different voltage levels to microcontrollers or processing units.
  4. Level shifting in memory interfaces: Translates voltage levels between memory modules and controllers.
  5. Bus-oriented systems: Enables multiple devices to share a common bus by providing 3-state outputs for bus control.

Detailed and Complete Alternative Models

  1. SN74LVC244A: Logic level shifter IC with similar characteristics and pin configuration.
  2. CD4050B: Hex non-inverting buffer/converter IC that can be used for

Перелічіть 10 типових запитань і відповідей, пов’язаних із застосуванням MC74LVX244MEL у технічних рішеннях

Sure! Here are 10 common questions and answers related to the application of MC74LVX244MEL in technical solutions:

  1. Q: What is MC74LVX244MEL? A: MC74LVX244MEL is a specific type of integrated circuit (IC) known as a buffer/line driver. It is commonly used for signal amplification and buffering in digital circuits.

  2. Q: What is the voltage supply range for MC74LVX244MEL? A: The voltage supply range for MC74LVX244MEL is typically between 2.0V and 5.5V.

  3. Q: How many channels does MC74LVX244MEL have? A: MC74LVX244MEL has 8 channels, which means it can handle 8 separate input/output signals.

  4. Q: What is the maximum output current of MC74LVX244MEL? A: The maximum output current of MC74LVX244MEL is typically around 24mA.

  5. Q: Can MC74LVX244MEL be used for level shifting between different voltage domains? A: Yes, MC74LVX244MEL can be used for level shifting between different voltage domains, as long as the voltage levels are within its specified range.

  6. Q: Is MC74LVX244MEL suitable for bidirectional communication? A: No, MC74LVX244MEL is unidirectional and can only be used for one-way signal transmission.

  7. Q: What is the propagation delay of MC74LVX244MEL? A: The propagation delay of MC74LVX244MEL is typically around 6 nanoseconds.

  8. Q: Can MC74LVX244MEL be used in high-speed applications? A: Yes, MC74LVX244MEL is designed for high-speed operation and can be used in applications with fast signal transitions.

  9. Q: Does MC74LVX244MEL have any built-in protection features? A: MC74LVX244MEL does not have built-in protection features, so external measures may be required to protect it from voltage spikes or ESD events.

  10. Q: What is the package type of MC74LVX244MEL? A: MC74LVX244MEL is typically available in a small outline integrated circuit (SOIC) package, which is a common surface-mount package type.

Please note that the answers provided here are general and may vary depending on the specific datasheet and manufacturer's specifications for MC74LVX244MEL.