Texas Instruments
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CD74AC646MG4
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CD74AC646MG4

Product Overview

  • Category: Integrated Circuit
  • Use: Data Bus Transceiver
  • Characteristics: High-speed, low-power, 3-state outputs
  • Package: SOIC (Small Outline Integrated Circuit)
  • Essence: Transfers data bidirectionally between two buses with different voltage levels
  • Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

  • Supply Voltage: 2V to 6V
  • Input Voltage Levels: 0V to VCC
  • Output Voltage Levels: 0V to VCC
  • Operating Temperature Range: -40°C to +85°C
  • Propagation Delay: 5.5ns (typical)
  • Output Drive Capability: ±24mA

Pin Configuration

The CD74AC646MG4 has a total of 24 pins. The pin configuration is as follows:

  1. A1
  2. B1
  3. C1
  4. D1
  5. E1
  6. F1
  7. GND
  8. OE#
  9. DIR
  10. CLK
  11. LE
  12. A2
  13. B2
  14. C2
  15. D2
  16. E2
  17. F2
  18. VCC
  19. O1
  20. O2
  21. O3
  22. O4
  23. O5
  24. O6

Functional Features

  • Bidirectional data transfer between two buses
  • Supports voltage level translation
  • 3-state outputs for bus isolation
  • Non-inverting data paths
  • Edge-triggered clock input
  • Latch enable control for synchronous operation

Advantages

  • High-speed operation allows for efficient data transfer
  • Low power consumption for energy-efficient applications
  • 3-state outputs enable bus isolation and reduce signal interference
  • Wide operating voltage range provides flexibility in different systems

Disadvantages

  • Limited output drive capability may not be suitable for high-current applications
  • Propagation delay may impact real-time data transfer in certain scenarios

Working Principles

The CD74AC646MG4 is a data bus transceiver that facilitates bidirectional data transfer between two buses with different voltage levels. It operates by using non-inverting data paths, allowing seamless communication between the buses. The direction of data flow is controlled by the DIR pin, while the CLK pin triggers the transfer operation. The latch enable (LE) pin enables synchronous operation, ensuring data integrity during the transfer process.

Detailed Application Field Plans

The CD74AC646MG4 is commonly used in various applications where data needs to be transferred bidirectionally between buses with different voltage levels. Some specific application fields include:

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

Detailed and Complete Alternative Models

  1. SN74LVC4245A: Octal Bus Transceiver with 3-State Outputs
  2. MC74VHC245: Octal Bus Transceiver with 3-State Outputs
  3. 74HCT640: Octal Bus Transceiver with Inverting Outputs
  4. CD74ACT540: Octal Buffer/Line Driver with 3-State Outputs
  5. SN74LVCH16245A: 16-Bit Bus Transceiver with 3-State Outputs

These alternative models offer similar functionality to the CD74AC646MG4 and can be considered as alternatives based on specific requirements.

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قم بإدراج 10 أسئلة وإجابات شائعة تتعلق بتطبيق CD74AC646MG4 في الحلول التقنية

Sure! Here are 10 common questions and answers related to the application of CD74AC646MG4 in technical solutions:

  1. Q: What is CD74AC646MG4? A: CD74AC646MG4 is a type of integrated circuit (IC) that functions as an octal bus transceiver with 3-state outputs.

  2. Q: What is the purpose of CD74AC646MG4 in technical solutions? A: CD74AC646MG4 is commonly used for bidirectional data transfer between different buses or systems in various electronic applications.

  3. Q: What voltage levels does CD74AC646MG4 support? A: CD74AC646MG4 supports a wide range of voltage levels, typically from 2V to 6V.

  4. Q: How many data lines can CD74AC646MG4 handle? A: CD74AC646MG4 can handle up to 8 data lines, making it suitable for applications requiring multiple data transfers.

  5. Q: Can CD74AC646MG4 be used for level shifting between different voltage domains? A: Yes, CD74AC646MG4 can be used for level shifting as it supports different voltage levels on its input and output sides.

  6. Q: Does CD74AC646MG4 have any built-in protection features? A: Yes, CD74AC646MG4 has built-in ESD (electrostatic discharge) protection to safeguard against static electricity damage.

  7. Q: What is the maximum operating frequency of CD74AC646MG4? A: CD74AC646MG4 can operate at frequencies up to several hundred megahertz (MHz), depending on the specific application and conditions.

  8. Q: Can CD74AC646MG4 be cascaded to increase the number of data lines? A: Yes, CD74AC646MG4 can be cascaded by connecting the output of one IC to the input of another, allowing for expansion of data lines.

  9. Q: Are there any specific power supply requirements for CD74AC646MG4? A: CD74AC646MG4 typically requires a single power supply voltage, usually in the range of 2V to 6V, depending on the specific variant.

  10. Q: What are some common applications of CD74AC646MG4? A: CD74AC646MG4 is commonly used in various technical solutions such as data communication systems, memory interfaces, bus arbitration, and general-purpose digital logic designs.

Please note that the answers provided here are general and may vary depending on the specific datasheet and application requirements of CD74AC646MG4.