TCA9548APWR

Product Overview

Category

TCA9548APWR belongs to the category of integrated circuits (ICs).

Use

This product is commonly used as an I2C multiplexer/demultiplexer. It allows multiple devices to communicate with a single I2C bus.

Characteristics

• Supports up to 8 channels for I2C communication.
• Provides bidirectional voltage-level translation between different I2C buses.
• Low ON-resistance switches minimize signal distortion.
• Compatible with both 3.3V and 5V systems.
• Can be cascaded to increase the number of available channels.

Package

TCA9548APWR is available in a small-sized TSSOP package, which ensures easy integration into various electronic systems.

Essence

The essence of TCA9548APWR lies in its ability to simplify I2C communication by enabling multiple devices to share a single I2C bus.

Packaging/Quantity

This product is typically packaged in reels or tubes, containing a specific quantity of ICs per package. The exact quantity may vary depending on the supplier.

Specifications

• Supply Voltage: 1.65V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• Maximum I2C Bus Frequency: 400kHz
• Number of Channels: 8
• ON-Resistance: 6Ω (typical)
• Input/Output Capacitance: 10pF (typical)

Detailed Pin Configuration

The TCA9548APWR IC has a total of 24 pins, each serving a specific function. The pin configuration is as follows:

1. SDA0: Channel 0 Serial Data Line
2. SCL0: Channel 0 Serial Clock Line
3. SDA1: Channel 1 Serial Data Line
4. SCL1: Channel 1 Serial Clock Line
5. SDA2: Channel 2 Serial Data Line
6. SCL2: Channel 2 Serial Clock Line
7. SDA3: Channel 3 Serial Data Line
8. SCL3: Channel 3 Serial Clock Line
9. SDA4: Channel 4 Serial Data Line
10. SCL4: Channel 4 Serial Clock Line
11. SDA5: Channel 5 Serial Data Line
12. SCL5: Channel 5 Serial Clock Line
13. SDA6: Channel 6 Serial Data Line
14. SCL6: Channel 6 Serial Clock Line
15. SDA7: Channel 7 Serial Data Line
16. SCL7: Channel 7 Serial Clock Line
17. GND: Ground
18. VCC: Supply Voltage
19. SDA: I2C Serial Data Line
20. SCL: I2C Serial Clock Line
21. ADDR0: Address Bit 0
22. ADDR1: Address Bit 1
23. ADDR2: Address Bit 2
24. ALERT: Interrupt Output

Functional Features

• Channel Selection: The TCA9548APWR allows the user to select a specific channel for communication by setting the appropriate address bits.
• Bidirectional Voltage-Level Translation: It ensures compatibility between different I2C buses operating at different voltage levels.
• Cascading Capability: Multiple TCA9548APWR ICs can be cascaded to increase the number of available channels, enabling communication with a larger number of devices.

Advantages and Disadvantages

Advantages

• Simplifies I2C communication by reducing the number of required bus lines.
• Enables efficient sharing of a single I2C bus among multiple devices.
• Provides bidirectional voltage-level translation, enhancing compatibility between different systems.
• Compact package size allows for easy integration into various electronic designs.

Disadvantages

• Limited to a maximum of 8 channels, which may not be sufficient for certain applications requiring a higher number of devices.
• Requires careful address bit configuration to avoid conflicts when multiple TCA9548APWR ICs are used in cascaded configurations.

Working Principles

The TCA9548APWR operates by selectively connecting the desired channel to the I2C bus. The user can set the address bits to choose the specific channel for communication. When a channel is selected, the corresponding serial data and clock lines are connected to the I2C bus, allowing communication with the device connected to that channel. The bidirectional voltage-level translation ensures seamless communication between devices operating at different voltage levels.

Detailed Application Field Plans

The TCA9548APWR finds applications in various fields where multiple devices need to communicate over a single I2C bus. Some potential application areas include:

1. Industrial Automation: Controlling and monitoring multiple sensors, actuators, and modules through a centralized I2C bus. 2