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MM74HC245AWMX
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MM74HC245AWMX

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Level shifting and signal buffering
  • Characteristics: High-speed, octal bus transceiver
  • Package: SOIC (Small Outline Integrated Circuit)
  • Essence: Transfers data between two bidirectional bus systems
  • Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

  • Supply Voltage: 2V to 6V
  • Input Voltage: 0V to VCC
  • Output Voltage: 0V to VCC
  • Operating Temperature: -40°C to +85°C
  • Propagation Delay: 10ns (typical)
  • Output Current: ±6mA
  • Input Capacitance: 3.5pF (typical)

Pin Configuration

The MM74HC245AWMX has a total of 20 pins, which are assigned as follows:

  1. DIR (Direction Control Input)
  2. OE (Output Enable Input)
  3. A1 (Data Input/Output)
  4. B1 (Data Input/Output)
  5. A2 (Data Input/Output)
  6. B2 (Data Input/Output)
  7. A3 (Data Input/Output)
  8. B3 (Data Input/Output)
  9. A4 (Data Input/Output)
  10. B4 (Data Input/Output)
  11. A5 (Data Input/Output)
  12. B5 (Data Input/Output)
  13. A6 (Data Input/Output)
  14. B6 (Data Input/Output)
  15. A7 (Data Input/Output)
  16. B7 (Data Input/Output)
  17. GND (Ground)
  18. B8 (Data Input/Output)
  19. A8 (Data Input/Output)
  20. VCC (Supply Voltage)

Functional Features

  • Bidirectional data transfer between two bus systems
  • Non-inverting outputs for direct interfacing with CMOS, TTL, and MOS
  • High-speed operation suitable for fast data transmission
  • 3-state outputs for bus isolation when not enabled
  • Schmitt-trigger inputs for noise immunity

Advantages

  • Wide supply voltage range allows compatibility with various systems
  • Fast propagation delay ensures efficient data transfer
  • 3-state outputs provide flexibility in bus design
  • Schmitt-trigger inputs enhance noise immunity

Disadvantages

  • Limited output current may restrict use in certain applications
  • Not suitable for high-voltage environments

Working Principles

The MM74HC245AWMX is an octal bus transceiver that facilitates bidirectional data transfer between two bus systems. It operates by controlling the direction of data flow using the DIR pin. When DIR is set to logic low, data is transferred from the A bus to the B bus. Conversely, when DIR is set to logic high, data flows from the B bus to the A bus.

The OE pin enables or disables the outputs. When OE is set to logic high, the outputs are disabled, effectively isolating the bus systems. This feature allows multiple devices to share a common bus without interfering with each other.

The inputs of the MM74HC245AWMX have Schmitt-trigger characteristics, providing improved noise immunity. The non-inverting outputs allow direct interfacing with various logic families such as CMOS, TTL, and MOS.

Detailed Application Field Plans

The MM74HC245AWMX finds application in various fields where bidirectional data transfer between different bus systems is required. Some common application areas include:

  1. Microcontroller interfacing
  2. Data communication systems
  3. Industrial automation
  4. Automotive electronics
  5. Robotics
  6. Networking equipment

Alternative Models

  • SN74HC245N
  • CD74HC245E
  • 74HCT245

These alternative models offer similar functionality and can be used as substitutes for the MM74HC245AWMX in different applications.

In conclusion, the MM74HC245AWMX is a high-speed octal bus transceiver that enables bidirectional data transfer between two bus systems. Its wide supply voltage range, fast propagation delay, and flexible output configuration make it suitable for various applications in microcontroller interfacing, data communication, industrial automation, and more.

Enumere 10 preguntas y respuestas comunes relacionadas con la aplicación de MM74HC245AWMX en soluciones técnicas

Sure! Here are 10 common questions and answers related to the application of MM74HC245AWMX in technical solutions:

  1. Q: What is MM74HC245AWMX? A: MM74HC245AWMX is a high-speed octal bus transceiver with 3-state outputs, commonly used for level shifting and signal buffering.

  2. Q: What is the operating voltage range of MM74HC245AWMX? A: The operating voltage range of MM74HC245AWMX is typically between 2V and 6V.

  3. Q: How many bidirectional channels does MM74HC245AWMX have? A: MM74HC245AWMX has 8 bidirectional channels, allowing data transmission in both directions.

  4. Q: Can MM74HC245AWMX be used for voltage level shifting? A: Yes, MM74HC245AWMX can be used for voltage level shifting as it supports different voltage levels on its input and output sides.

  5. Q: What is the maximum data transfer rate supported by MM74HC245AWMX? A: MM74HC245AWMX supports high-speed data transfer rates up to 80 MHz.

  6. Q: Does MM74HC245AWMX have built-in protection features? A: No, MM74HC245AWMX does not have built-in protection features. External protection measures may be required depending on the application.

  7. Q: Can MM74HC245AWMX be used in bi-directional communication systems? A: Yes, MM74HC245AWMX is suitable for bi-directional communication systems as it allows bidirectional data flow.

  8. Q: What is the power supply current consumption of MM74HC245AWMX? A: The power supply current consumption of MM74HC245AWMX is typically around 8 mA.

  9. Q: Can MM74HC245AWMX be used in automotive applications? A: Yes, MM74HC245AWMX can be used in automotive applications as it meets the necessary requirements for automotive environments.

  10. Q: What is the package type of MM74HC245AWMX? A: MM74HC245AWMX is available in a small outline SOIC (SOIC-20) package, which is commonly used in electronic circuits.

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