Texas Instruments
Maaaring representasyon ang larawan.
Tingnan ang mga detalye para sa mga detalye ng produkto.
TCA9546APWR
Tingnan ang Detalye DataSheets

TCA9546APWR

Product Overview

Category

TCA9546APWR belongs to the category of integrated circuits (ICs).

Use

This product is commonly used as a multiplexer/demultiplexer, specifically designed for I2C-bus applications.

Characteristics

  • TCA9546APWR is a low-voltage 8-channel I2C switch.
  • It operates from 1.65V to 5.5V, making it suitable for various applications.
  • The device allows bidirectional voltage-level translation between different I2C buses.
  • It provides an efficient solution for connecting multiple I2C devices to a single I2C bus.

Package and Essence

TCA9546APWR is available in a small-sized TSSOP-24 package. Its essence lies in its ability to enable communication between multiple I2C devices using a single I2C bus.

Packaging/Quantity

The product is typically packaged in reels, with 2500 units per reel.

Specifications

  • Supply Voltage: 1.65V to 5.5V
  • Operating Temperature Range: -40°C to +85°C
  • Number of Channels: 8
  • I2C Bus Compatibility: Standard-mode, Fast-mode, Fast-mode Plus, and High-speed mode
  • Maximum Frequency: 400kHz
  • On-resistance: 3.5Ω (typical)

Detailed Pin Configuration

The TCA9546APWR IC has a total of 24 pins. Here is the detailed pin configuration:

  1. SDA0: I2C-bus data input/output for channel 0
  2. SCL0: I2C-bus clock input for channel 0
  3. SDA1: I2C-bus data input/output for channel 1
  4. SCL1: I2C-bus clock input for channel 1
  5. SDA2: I2C-bus data input/output for channel 2
  6. SCL2: I2C-bus clock input for channel 2
  7. SDA3: I2C-bus data input/output for channel 3
  8. SCL3: I2C-bus clock input for channel 3
  9. SDA4: I2C-bus data input/output for channel 4
  10. SCL4: I2C-bus clock input for channel 4
  11. SDA5: I2C-bus data input/output for channel 5
  12. SCL5: I2C-bus clock input for channel 5
  13. SDA6: I2C-bus data input/output for channel 6
  14. SCL6: I2C-bus clock input for channel 6
  15. SDA7: I2C-bus data input/output for channel 7
  16. SCL7: I2C-bus clock input for channel 7
  17. GND: Ground
  18. VCC: Supply voltage
  19. SDA: I2C-bus data input/output
  20. SCL: I2C-bus clock input
  21. A0: Address input bit 0
  22. A1: Address input bit 1
  23. A2: Address input bit 2
  24. NC: No connection

Functional Features

  • TCA9546APWR allows the user to select any combination of channels for communication with the I2C bus.
  • It provides a simple and efficient way to expand the I2C bus capability by connecting multiple devices.
  • The device supports hot insertion, allowing channels to be added or removed without interrupting the bus communication.
  • It features a low standby current, making it suitable for power-sensitive applications.

Advantages and Disadvantages

Advantages

  • Enables communication with multiple I2C devices using a single I2C bus.
  • Supports various I2C bus modes and frequencies.
  • Compact package size allows for space-efficient designs.
  • Hot insertion capability simplifies system maintenance and upgrades.
  • Low standby current reduces power consumption.

Disadvantages

  • Limited to 8 channels, which may not be sufficient for applications requiring a higher number of I2C devices.
  • Requires careful consideration of address assignment to avoid conflicts in multi-channel configurations.

Working Principles

TCA9546APWR operates as a bidirectional I2C switch. It uses its internal control logic to select one of the eight channels and connects it to the I2C bus. The selection is made by setting the appropriate combination of address input bits (A0, A1, A2). When a channel is selected, the corresponding SDA and SCL pins are connected to the I2C bus, allowing communication with the desired device connected to that channel

Maglista ng 10 karaniwang tanong at sagot na nauugnay sa aplikasyon ng TCA9546APWR sa mga teknikal na solusyon

Sure! Here are 10 common questions and answers related to the application of TCA9546APWR:

  1. Q: What is TCA9546APWR? A: TCA9546APWR is a multiplexer/demultiplexer IC that allows multiple I2C devices to share the same I2C bus.

  2. Q: How many channels does TCA9546APWR have? A: TCA9546APWR has 4 channels, which means it can connect up to 4 different I2C devices.

  3. Q: How do I select a specific channel on TCA9546APWR? A: To select a channel, you need to write the corresponding channel number (0-3) to the control register of TCA9546APWR.

  4. Q: Can I use TCA9546APWR to connect multiple sensors to a microcontroller? A: Yes, TCA9546APWR is commonly used to connect multiple sensors or other I2C devices to a single microcontroller.

  5. Q: What is the benefit of using TCA9546APWR in my design? A: TCA9546APWR helps reduce the number of I2C pins required on your microcontroller, allowing you to connect more devices.

  6. Q: Can I use TCA9546APWR with any microcontroller? A: Yes, TCA9546APWR is compatible with most microcontrollers that support I2C communication.

  7. Q: How do I address individual devices connected to TCA9546APWR? A: Each device connected to TCA9546APWR should have a unique I2C address, which you can use to communicate with them individually.

  8. Q: Can I daisy-chain multiple TCA9546APWR ICs together? A: Yes, you can daisy-chain multiple TCA9546APWR ICs to expand the number of available channels.

  9. Q: What is the maximum I2C bus speed supported by TCA9546APWR? A: TCA9546APWR supports standard I2C bus speeds up to 400 kHz.

  10. Q: Are there any limitations or considerations when using TCA9546APWR? A: One consideration is that TCA9546APWR introduces additional latency in communication due to channel switching. Also, it's important to ensure that the total capacitance on the I2C bus does not exceed the specified limits.

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