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SN74ABT646DW
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SN74ABT646DW

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Bus Transceiver
  • Characteristics: High-speed, bidirectional, 8-bit transceiver
  • Package: SOIC (Small Outline Integrated Circuit)
  • Essence: Facilitates bidirectional data transfer between two buses with different voltage levels
  • Packaging/Quantity: Tape and reel, 2500 units per reel

Specifications

  • Supply Voltage Range: 4.5V to 5.5V
  • Input Voltage Range: 0V to VCC
  • Output Voltage Range: 0V to VCC
  • Operating Temperature Range: -40°C to +85°C
  • Propagation Delay Time: 3.5ns (max)
  • Output Current: ±24mA
  • ESD Protection: >2000V

Detailed Pin Configuration

The SN74ABT646DW has a total of 24 pins, which are assigned as follows:

  1. OE (Output Enable) A
  2. I/O0A (Bidirectional Data I/O) A
  3. I/O1A (Bidirectional Data I/O) A
  4. I/O2A (Bidirectional Data I/O) A
  5. I/O3A (Bidirectional Data I/O) A
  6. I/O4A (Bidirectional Data I/O) A
  7. I/O5A (Bidirectional Data I/O) A
  8. GND (Ground)
  9. I/O6A (Bidirectional Data I/O) A
  10. I/O7A (Bidirectional Data I/O) A
  11. VCC (Supply Voltage)
  12. DIR (Direction Control)
  13. OE (Output Enable) B
  14. I/O0B (Bidirectional Data I/O) B
  15. I/O1B (Bidirectional Data I/O) B
  16. I/O2B (Bidirectional Data I/O) B
  17. I/O3B (Bidirectional Data I/O) B
  18. I/O4B (Bidirectional Data I/O) B
  19. I/O5B (Bidirectional Data I/O) B
  20. GND (Ground)
  21. I/O6B (Bidirectional Data I/O) B
  22. I/O7B (Bidirectional Data I/O) B
  23. VCC (Supply Voltage)
  24. GND (Ground)

Functional Features

  • Bidirectional data transfer between two buses with different voltage levels
  • High-speed operation, suitable for applications requiring fast data transmission
  • Output enable control for disabling the outputs when not in use
  • Direction control for selecting the direction of data flow

Advantages and Disadvantages

Advantages: - Enables seamless communication between buses operating at different voltage levels - High-speed operation allows for efficient data transfer - Output enable control provides flexibility in managing the outputs

Disadvantages: - Limited to 8-bit data transfer - Requires careful consideration of voltage compatibility between buses

Working Principles

The SN74ABT646DW is a bidirectional bus transceiver that facilitates data transfer between two buses operating at different voltage levels. It uses a combination of input/output buffers and level-shifting circuitry to ensure proper signal translation.

The direction of data flow is controlled by the DIR pin. When DIR is set to logic high, data is transferred from Bus A to Bus B, and when DIR is set to logic low, data is transferred from Bus B to Bus A.

The OE pins are used to enable or disable the outputs. When OE is set to logic high, the outputs are enabled, allowing data to be transmitted. Conversely, when OE is set to logic low, the outputs are disabled, effectively isolating the two buses.

Detailed Application Field Plans

The SN74ABT646DW is commonly used in various applications where bidirectional data transfer between buses with different voltage levels is required. Some of the typical application fields include:

  1. Communication Systems: Facilitating data exchange between different communication protocols operating at varying voltage levels.
  2. Industrial Automation: Enabling seamless communication between control systems and peripheral devices with different voltage requirements.
  3. Automotive Electronics: Supporting data transmission between various automotive subsystems operating at different voltage levels.
  4. Computer Peripherals: Allowing data transfer between different interfaces, such as USB and UART, with varying voltage specifications.

Detailed and Complete Alternative Models

  1. SN74ABT646DWR: Similar to SN74ABT646DW but available in a smaller package (SOIC-20).
  2. SN74ABT646ADB: Dual supply voltage version of SN74ABT646DW, suitable for applications requiring separate supply voltages for each bus.
  3. SN74ABT646APW: Available in TSSOP package, offering a compact footprint for space-constrained applications.

These

Seznam 10 běžných otázek a odpovědí souvisejících s aplikací SN74ABT646DW v technických řešeních

Sure! Here are 10 common questions and answers related to the application of SN74ABT646DW:

  1. Q: What is SN74ABT646DW? A: SN74ABT646DW is a type of integrated circuit (IC) commonly used as a bus transceiver and voltage level shifter.

  2. Q: What is the operating voltage range for SN74ABT646DW? A: The operating voltage range for SN74ABT646DW is typically between 4.5V and 5.5V.

  3. Q: Can SN74ABT646DW be used for bidirectional data transfer? A: Yes, SN74ABT646DW supports bidirectional data transfer, making it suitable for applications where data needs to be transmitted in both directions.

  4. Q: What is the maximum data transfer rate supported by SN74ABT646DW? A: SN74ABT646DW can support data transfer rates up to 100 MHz, making it suitable for high-speed applications.

  5. Q: Does SN74ABT646DW have built-in voltage level shifting capabilities? A: Yes, SN74ABT646DW has built-in voltage level shifting capabilities, allowing it to interface between different voltage domains.

  6. Q: Can SN74ABT646DW handle multiple voltage levels simultaneously? A: Yes, SN74ABT646DW can handle multiple voltage levels simultaneously, making it useful in mixed-voltage systems.

  7. Q: What is the maximum current that SN74ABT646DW can source or sink? A: SN74ABT646DW can source or sink up to 32 mA of current per output pin.

  8. Q: Is SN74ABT646DW compatible with other logic families? A: Yes, SN74ABT646DW is compatible with a wide range of logic families, including TTL, CMOS, and LVTTL.

  9. Q: Can SN74ABT646DW be used in automotive applications? A: Yes, SN74ABT646DW is designed to meet the requirements of automotive applications, making it suitable for use in vehicles.

  10. Q: Are there any special considerations when designing with SN74ABT646DW? A: It is important to ensure proper decoupling and signal integrity practices when designing with SN74ABT646DW, especially in high-speed applications.

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