Texas Instruments
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SN74ABT2245NSR
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SN74ABT2245NSR

Product Overview

  • Category: Integrated Circuit (IC)
  • Use: Bus Transceiver
  • Characteristics: High-speed, bidirectional voltage-level translator
  • Package: 20-pin small-outline integrated circuit (SOIC)
  • Essence: Transfers data between two bidirectional bus systems with different voltage levels
  • Packaging/Quantity: Available in tape and reel packaging, quantity varies based on supplier

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
  • Maximum Data Rate: 100Mbps

Detailed Pin Configuration

The SN74ABT2245NSR has a total of 20 pins. The pin configuration is as follows:

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

Functional Features

  • Bidirectional voltage-level translation between two bus systems
  • Supports both 3.3V and 5V logic levels
  • Enables communication between devices operating at different voltage levels
  • High-speed data transfer with minimal propagation delay
  • Output enable control for disabling the outputs when not in use

Advantages and Disadvantages

Advantages: - Allows interfacing between different voltage domains - Fast data transfer rate - Compact package size - Wide operating temperature range

Disadvantages: - Requires careful consideration of voltage compatibility - Limited to bidirectional bus applications - May introduce signal degradation if used beyond specified limits

Working Principles

The SN74ABT2245NSR acts as a bidirectional voltage-level translator, allowing data transfer between two bus systems with different voltage levels. It utilizes a direction control pin (DIR) to determine the direction of data flow. When DIR is set to logic high, data is transferred from Side A to Side B, and when DIR is set to logic low, data is transferred from Side B to Side A.

The device operates by using a combination of voltage level shifters and transceivers. The voltage level shifters ensure that the input signals from one bus system are translated to the appropriate voltage levels required by the other bus system. The transceivers handle the bidirectional data transfer, ensuring efficient and reliable communication between the two bus systems.

Detailed Application Field Plans

The SN74ABT2245NSR finds application in various fields where there is a need to interface between different voltage domains. Some common application areas include:

  1. Embedded Systems: Used to connect microcontrollers or processors operating at different voltage levels.
  2. Communication Systems: Facilitates data transfer between devices with varying logic levels, such as UART, SPI, or I2C interfaces.
  3. Industrial Automation: Enables communication between different modules or subsystems operating at different voltage levels.
  4. Automotive Electronics: Used in automotive systems to interface between components with different voltage requirements.

Detailed and Complete Alternative Models

  1. SN74LVC4245A: Low-voltage CMOS octal bus transceiver with 3-state outputs.
  2. SN74HCT245N: High-speed CMOS octal bus transceiver with 3-state outputs.
  3. SN74LVCH245A: Low-voltage CMOS octal bus transceiver with 3-state outputs.

These alternative models offer similar functionality and can be used as substitutes for the SN74ABT2245NSR depending on specific application requirements.

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Enumere 10 preguntas y respuestas comunes relacionadas con la aplicación de SN74ABT2245NSR en soluciones técnicas

Sure! Here are 10 common questions and answers related to the application of SN74ABT2245NSR in technical solutions:

  1. Q: What is SN74ABT2245NSR? A: SN74ABT2245NSR is a type of octal bus transceiver with 3-state outputs, commonly used for bidirectional data transfer between different voltage levels.

  2. Q: What is the operating voltage range of SN74ABT2245NSR? A: The operating voltage range of SN74ABT2245NSR is typically between 4.5V and 5.5V.

  3. Q: Can SN74ABT2245NSR be used for level shifting between different voltage domains? A: Yes, SN74ABT2245NSR can be used for level shifting between different voltage domains, as it supports bidirectional data transfer.

  4. Q: How many channels does SN74ABT2245NSR have? A: SN74ABT2245NSR has 8 bidirectional channels, allowing for simultaneous data transfer in both directions.

  5. Q: What is the maximum data transfer rate supported by SN74ABT2245NSR? A: SN74ABT2245NSR supports high-speed data transfer up to 100 MHz.

  6. Q: Can SN74ABT2245NSR handle multiple voltage levels simultaneously? A: Yes, SN74ABT2245NSR can handle multiple voltage levels simultaneously, making it suitable for mixed-voltage systems.

  7. Q: Does SN74ABT2245NSR have built-in protection features? A: Yes, SN74ABT2245NSR has built-in ESD protection, which helps safeguard against electrostatic discharge events.

  8. Q: Can SN74ABT2245NSR be used in both parallel and serial communication systems? A: Yes, SN74ABT2245NSR can be used in both parallel and serial communication systems, depending on the application requirements.

  9. Q: What is the power supply current consumption of SN74ABT2245NSR? A: The power supply current consumption of SN74ABT2245NSR typically ranges from 10 mA to 20 mA, depending on the operating conditions.

  10. Q: Are there any specific layout considerations for using SN74ABT2245NSR? A: Yes, it is recommended to follow the layout guidelines provided in the datasheet to ensure proper signal integrity and minimize noise coupling.

Please note that these answers are general and may vary based on specific application requirements and the manufacturer's specifications.