NXP USA Inc.
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74ABT646AD,118
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Encyclopedia Entry: 74ABT646AD,118

Product Overview

Category

The 74ABT646AD,118 belongs to the category of integrated circuits (ICs) and specifically falls under the family of bus transceivers.

Use

This product is commonly used in digital systems for bidirectional data transfer between buses with different voltage levels. It acts as a buffer, allowing data to flow in both directions while ensuring compatibility between the two buses.

Characteristics

  • Bidirectional data transfer
  • Voltage level translation
  • High-speed operation
  • Low power consumption
  • Schmitt-trigger inputs for noise immunity

Package

The 74ABT646AD,118 is available in a standard 24-pin SOIC (Small Outline Integrated Circuit) package. This package offers compactness and ease of integration into various electronic systems.

Essence

The essence of the 74ABT646AD,118 lies in its ability to facilitate seamless communication between buses operating at different voltage levels, ensuring reliable data transmission.

Packaging/Quantity

The product is typically supplied in reels or tubes, containing a quantity of 250 units per package.

Specifications

  • Supply Voltage Range: 4.5V to 5.5V
  • Input Voltage Levels:
    • High-Level Input Voltage: 2.0V to VCC + 0.5V
    • Low-Level Input Voltage: -0.5V to 0.8V
  • Output Voltage Levels:
    • High-Level Output Voltage: VCC - 0.5V
    • Low-Level Output Voltage: 0.5V
  • Operating Temperature Range: -40°C to +85°C
  • Maximum Propagation Delay: 6 ns

Detailed Pin Configuration

The 74ABT646AD,118 has a total of 24 pins. The pin configuration is as follows:

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

Functional Features

  • Bidirectional data transfer between two buses with different voltage levels.
  • Automatic direction control based on the DIR pin.
  • Output enable pins (OE) for enabling/disabling the outputs.
  • Schmitt-trigger inputs for improved noise immunity.
  • High-speed operation allows for efficient data transmission.

Advantages and Disadvantages

Advantages

  • Enables seamless communication between buses with different voltage levels.
  • Provides bidirectional data transfer capability.
  • Low power consumption.
  • High-speed operation ensures efficient data transmission.
  • Schmitt-trigger inputs enhance noise immunity.

Disadvantages

  • Limited to specific applications requiring voltage level translation.
  • May not be suitable for systems with stringent space constraints due to the 24-pin package size.

Working Principles

The 74ABT646AD,118 operates by receiving data from one bus and transmitting it to another bus bidirectionally. The direction of data flow is controlled by the DIR pin. When DIR is set to a logic high, data flows from Bus A to Bus B, and when DIR is set to a logic low, data flows from Bus B to Bus A. The OE pins are used to enable or disable the outputs.

The voltage level translation is achieved through internal circuitry that ensures compatibility between the two buses operating at different voltage levels.

Detailed Application Field Plans

The 74ABT646AD,118 finds applications in various digital systems where bidirectional data transfer between buses with different voltage levels is required. Some specific application fields include:

  1. Microcontroller interfacing with external memory modules.
  2. Communication interfaces between different logic families.
  3. Data communication between FPGA (Field-Programmable Gate Array) and peripheral devices.
  4. Industrial automation systems requiring voltage level translation.

Detailed and Complete Alternative Models

  1. SN74LVC245A: This bus transceiver offers similar functionality but operates at a lower voltage range of 1.65V to 5.5V.
  2. CD74HCT245: This model provides bidirectional data transfer and voltage level translation, suitable for applications requiring high noise immunity.
  3. MC74VHC245: This alternative offers high-speed operation and

Énumérez 10 questions et réponses courantes liées à l'application de 74ABT646AD,118 dans les solutions techniques

Sure! Here are 10 common questions and answers related to the application of 74ABT646AD,118 in technical solutions:

  1. Q: What is the function of the 74ABT646AD,118? A: The 74ABT646AD,118 is an octal bus transceiver with direction control.

  2. Q: How many bits can the 74ABT646AD,118 handle? A: It can handle 8 bits of data.

  3. Q: What is the purpose of the direction control feature? A: The direction control feature allows bidirectional data transfer between two buses.

  4. Q: Can the 74ABT646AD,118 be used for level shifting? A: Yes, it can be used for level shifting as it supports both TTL and CMOS voltage levels.

  5. Q: What is the maximum operating frequency of the 74ABT646AD,118? A: The maximum operating frequency is typically around 200 MHz.

  6. Q: Does the 74ABT646AD,118 have any built-in protection features? A: Yes, it has built-in ESD protection on all inputs and outputs.

  7. Q: Can the 74ABT646AD,118 be cascaded to handle more than 8 bits? A: Yes, multiple 74ABT646AD,118 chips can be cascaded to handle larger data widths.

  8. Q: What is the power supply voltage range for the 74ABT646AD,118? A: The power supply voltage range is typically between 4.5V and 5.5V.

  9. Q: Is the 74ABT646AD,118 compatible with other logic families? A: Yes, it is compatible with both TTL and CMOS logic families.

  10. Q: Can the 74ABT646AD,118 be used in high-speed applications? A: Yes, it is designed for high-speed operation and can be used in various high-speed applications.

Please note that these answers are general and may vary depending on the specific requirements and datasheet of the 74ABT646AD,118.