Texas Instruments
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PCA9548ADWG4
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PCA9548ADWG4

Product Overview

Category

PCA9548ADWG4 belongs to the category of integrated circuits (ICs).

Use

This product is commonly used as an I2C multiplexer/demultiplexer. It allows multiple I2C devices to be connected to a single I2C bus, enabling communication with each device individually.

Characteristics

  • I2C multiplexer/demultiplexer
  • 8 channels for connecting multiple I2C devices
  • Low voltage operation: 2.3V to 5.5V
  • High-speed I2C bus interface
  • Low standby current consumption
  • Compatible with I2C standard mode and fast mode

Package

PCA9548ADWG4 is available in a TSSOP-24 package.

Essence

The essence of PCA9548ADWG4 lies in its ability to simplify I2C bus management by allowing multiple devices to share a single bus, reducing the number of required I2C interfaces.

Packaging/Quantity

This product is typically packaged in reels or tubes, with a quantity of 250 units per reel/tube.

Specifications

  • Supply Voltage Range: 2.3V to 5.5V
  • Operating Temperature Range: -40°C to +85°C
  • I2C Bus Frequency: Up to 400kHz
  • Channel Resistance: 10Ω (typical)
  • Standby Current: 1μA (maximum)

Detailed Pin Configuration

The PCA9548ADWG4 has a total of 24 pins. The pin configuration is as follows:

  1. SDA0: I2C data line for channel 0
  2. SCL0: I2C clock line for channel 0
  3. EN0: Enable control for channel 0
  4. SDA1: I2C data line for channel 1
  5. SCL1: I2C clock line for channel 1
  6. EN1: Enable control for channel 1
  7. SDA2: I2C data line for channel 2
  8. SCL2: I2C clock line for channel 2
  9. EN2: Enable control for channel 2
  10. SDA3: I2C data line for channel 3
  11. SCL3: I2C clock line for channel 3
  12. EN3: Enable control for channel 3
  13. SDA4: I2C data line for channel 4
  14. SCL4: I2C clock line for channel 4
  15. EN4: Enable control for channel 4
  16. SDA5: I2C data line for channel 5
  17. SCL5: I2C clock line for channel 5
  18. EN5: Enable control for channel 5
  19. SDA6: I2C data line for channel 6
  20. SCL6: I2C clock line for channel 6
  21. EN6: Enable control for channel 6
  22. SDA7: I2C data line for channel 7
  23. SCL7: I2C clock line for channel 7
  24. EN7: Enable control for channel 7

Functional Features

  • Allows multiple I2C devices to share a single I2C bus
  • Individual enable control for each channel
  • High-speed I2C bus interface for efficient communication
  • Low standby current consumption for power efficiency
  • Compatible with standard and fast mode I2C devices

Advantages and Disadvantages

Advantages

  • Simplifies I2C bus management by reducing the number of required interfaces
  • Enables efficient communication with multiple I2C devices
  • Low standby current consumption for power efficiency

Disadvantages

  • Limited to 8 channels, may not be suitable for applications requiring more than 8 I2C devices

Working Principles

PCA9548ADWG4 works by selectively connecting one of the eight I2C channels to the common I2C bus. The enable control pins (EN0-EN7) determine which channel is active at a given time. When a specific channel is enabled, the corresponding I2C data and clock lines (SDA and SCL) are connected to the common bus, allowing communication with the device connected to that channel.

Detailed Application Field Plans

PCA9548ADWG4 finds applications in various fields where multiple I2C devices need to be connected to a single I2C bus. Some potential application areas include:

  1. Industrial automation systems
  2. Internet of Things (IoT) devices
  3. Robotics and control systems
  4. Automotive electronics
  5. Medical equipment

Detailed and Complete Alternative Models

Some alternative models that

Énumérez 10 questions et réponses courantes liées à l'application de PCA9548ADWG4 dans les solutions techniques

  1. Question: What is PCA9548ADWG4?
    Answer: PCA9548ADWG4 is an 8-channel I2C-bus multiplexer with reset.

  2. Question: What is the operating voltage range of PCA9548ADWG4?
    Answer: The operating voltage range is 2.3V to 5.5V.

  3. Question: How many channels does PCA9548ADWG4 have?
    Answer: It has 8 channels for I2C-bus communication.

  4. Question: Can PCA9548ADWG4 be used for level shifting?
    Answer: Yes, it can be used for level shifting between different voltage domains.

  5. Question: What is the purpose of using PCA9548ADWG4 in a technical solution?
    Answer: PCA9548ADWG4 is used to enable multiple I2C-bus masters to communicate with multiple I2C-bus slaves.

  6. Question: What is the maximum frequency supported by PCA9548ADWG4?
    Answer: It supports a maximum frequency of 400kHz.

  7. Question: Is PCA9548ADWG4 suitable for applications requiring bus buffering?
    Answer: Yes, it can be used for bus buffering to isolate capacitance and reduce loading on the I2C-bus.

  8. Question: Can PCA9548ADWG4 be cascaded to expand the number of channels?
    Answer: Yes, multiple PCA9548ADWG4 devices can be cascaded to expand the number of channels.

  9. Question: What are the typical applications of PCA9548ADWG4?
    Answer: Typical applications include connecting multiple I2C-bus devices to a single microcontroller, and enabling communication with multiple sensors or peripherals.

  10. Question: Does PCA9548ADWG4 have built-in ESD protection?
    Answer: Yes, it has built-in ESD protection on all pins.