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SN74HCT646DW
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SN74HCT646DW

Product Overview

Category

SN74HCT646DW belongs to the category of integrated circuits (ICs).

Use

This IC is commonly used for signal level shifting and bus interfacing applications.

Characteristics

  • High-speed operation
  • Wide voltage range
  • Schmitt-trigger inputs
  • 3-state outputs

Package

SN74HCT646DW is available in a standard SOIC (Small Outline Integrated Circuit) package.

Essence

The essence of SN74HCT646DW lies in its ability to facilitate bidirectional voltage level translation between different logic families.

Packaging/Quantity

SN74HCT646DW is typically packaged in reels or tubes, with quantities varying depending on the supplier.

Specifications

  • Supply Voltage: 2V to 6V
  • Logic Family: HCT
  • Number of Channels: 8
  • Input/Output Type: Tri-State
  • Operating Temperature Range: -40°C to +85°C
  • Propagation Delay Time: 15ns (max)
  • Output Current: ±6mA

Detailed Pin Configuration

  1. OE (Output Enable)
  2. A1 (Channel Select)
  3. A2 (Channel Select)
  4. A3 (Channel Select)
  5. A4 (Channel Select)
  6. GND (Ground)
  7. B1 (Channel Select)
  8. B2 (Channel Select)
  9. B3 (Channel Select)
  10. B4 (Channel Select)
  11. VCC (Supply Voltage)
  12. B5 (Channel Select)
  13. B6 (Channel Select)
  14. B7 (Channel Select)
  15. B8 (Channel Select)
  16. DIR (Direction Control)
  17. I/O1 (Bidirectional I/O)
  18. I/O2 (Bidirectional I/O)
  19. I/O3 (Bidirectional I/O)
  20. I/O4 (Bidirectional I/O)
  21. I/O5 (Bidirectional I/O)
  22. I/O6 (Bidirectional I/O)
  23. I/O7 (Bidirectional I/O)
  24. I/O8 (Bidirectional I/O)

Functional Features

  • Bidirectional voltage level translation
  • 3-state outputs for bus interfacing
  • Schmitt-trigger inputs for noise immunity
  • Output enable control for flexible operation

Advantages and Disadvantages

Advantages

  • High-speed operation allows for efficient data transfer.
  • Wide voltage range enables compatibility with various logic families.
  • Schmitt-trigger inputs provide robustness against noise.

Disadvantages

  • Limited number of channels may restrict certain applications.
  • Propagation delay time may affect real-time systems.

Working Principles

SN74HCT646DW operates by receiving input signals from one logic family and translating them to the appropriate voltage levels required by another logic family. The direction of translation is controlled by the DIR pin. When the DIR pin is set to a specific logic level, the corresponding bidirectional I/O pins allow data to flow in that direction.

Detailed Application Field Plans

SN74HCT646DW finds application in various fields, including:

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

Detailed and Complete Alternative Models

  1. SN74HCT645DW
  2. SN74HCT647DW
  3. SN74HCT648DW
  4. SN74HCT649DW
  5. SN74HCT640DW

These alternative models offer similar functionality and can be used as substitutes for SN74HCT646DW depending on specific requirements.

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Enumere 10 preguntas y respuestas comunes relacionadas con la aplicación de SN74HCT646DW en soluciones técnicas

Sure! Here are 10 common questions and answers related to the application of SN74HCT646DW:

  1. Q: What is SN74HCT646DW? A: SN74HCT646DW is a high-speed octal bus transceiver with 3-state outputs, commonly used in digital systems.

  2. Q: What is the operating voltage range for SN74HCT646DW? A: The operating voltage range for SN74HCT646DW is typically between 4.5V and 5.5V.

  3. Q: What is the maximum data transfer rate supported by SN74HCT646DW? A: SN74HCT646DW supports a maximum data transfer rate of up to 25 MHz.

  4. Q: Can SN74HCT646DW be used for bidirectional data transfer? A: Yes, SN74HCT646DW can be used for bidirectional data transfer as it has separate input and output ports.

  5. Q: How many data lines can SN74HCT646DW handle? A: SN74HCT646DW can handle up to 8 data lines, making it suitable for applications requiring parallel data transfer.

  6. Q: Does SN74HCT646DW have built-in protection against bus contention? A: Yes, SN74HCT646DW has built-in bus hold circuitry that prevents bus contention when the output is disabled.

  7. Q: Can SN74HCT646DW be used in mixed-voltage level systems? A: Yes, SN74HCT646DW is compatible with mixed-voltage level systems as it has 5V tolerant inputs.

  8. Q: What is the typical propagation delay of SN74HCT646DW? A: The typical propagation delay of SN74HCT646DW is around 10 ns.

  9. Q: Can SN74HCT646DW be used in high-noise environments? A: Yes, SN74HCT646DW has Schmitt-trigger inputs that provide hysteresis and make it more immune to noise.

  10. Q: What package does SN74HCT646DW come in? A: SN74HCT646DW is available in a standard SOIC-24 package.

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