TCA9544APWR

Product Overview

Category

TCA9544APWR belongs to the category of integrated circuits (ICs).

Use

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

Characteristics

• TCA9544APWR is a 4-channel I2C multiplexer/demultiplexer.
• It allows multiple devices with the same I2C address to be controlled by a single I2C bus master.
• The device supports bidirectional data transfer and is compatible with both standard-mode (100 kHz) and fast-mode (400 kHz) I2C-bus protocols.

Package

TCA9544APWR is available in a TSSOP-16 package.

Essence

The essence of TCA9544APWR lies in its ability to expand the capacity of an I2C bus, enabling communication with multiple devices that share the same I2C address.

Packaging/Quantity

This product is typically sold in reels or tubes, with a quantity of 2500 units per reel/tube.

Specifications

• Supply Voltage: 1.65V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• I2C Address Range: 0x70 to 0x77
• Channel-to-Channel Isolation: > 50 dB at 1 MHz

Detailed Pin Configuration

The TCA9544APWR IC has the following pin configuration:

| Pin Number | Pin Name | Description | |------------|----------|-------------| | 1 | SDA | Serial Data Input/Output | | 2 | SCL | Serial Clock Input | | 3 | A0 | Address Bit 0 | | 4 | A1 | Address Bit 1 | | 5 | A2 | Address Bit 2 | | 6-9 | NC | No Connection | | 10-13 | Sx | Channel Select Inputs | | 14 | GND | Ground | | 15 | VCC | Supply Voltage | | 16 | NC | No Connection |

Functional Features

• TCA9544APWR allows the user to select one of the four available channels for communication with I2C devices.
• It provides a simple and efficient solution for expanding the capacity of an I2C bus without requiring additional I2C master interfaces.
• The device supports hot-swapping, allowing channels to be enabled or disabled on-the-fly.

Advantages and Disadvantages

Advantages

• Enables communication with multiple devices sharing the same I2C address.
• Simplifies I2C bus expansion without the need for additional I2C master interfaces.
• Supports hot-swapping for dynamic channel selection.

Disadvantages

• Limited to a maximum of four channels.
• Requires careful consideration of I2C address conflicts when using multiple TCA9544APWR devices in the same system.

Working Principles

TCA9544APWR operates by selectively connecting one of the four input channels to the output channel. This is achieved through the control inputs (S0-S3) that determine the active channel. The selected channel's SDA and SCL lines are connected to the corresponding output pins, allowing communication with the desired I2C device.

Detailed Application Field Plans

The TCA9544APWR IC finds applications in various scenarios where multiple I2C devices with the same address need to be controlled. Some common application fields include:

1. Sensor Networks: In sensor networks, multiple sensors often share the same I2C address. TCA9544APWR enables communication with individual sensors by selecting the appropriate channel.

2. Industrial Automation: In industrial automation systems, several I2C-based modules may need to be connected to a central controller. TCA9544APWR simplifies the connection by allowing multiple modules to share the same I2C address.

3. Robotics: Robots often utilize multiple I2C devices for various functions. TCA9544APWR facilitates efficient control and communication with these devices through channel selection.

Detailed and Complete Alternative Models

1. PCA9544APW: Similar to TCA9544APWR, this 4-channel I2C multiplexer/demultiplexer offers comparable functionality and pin configuration.

2. TCA9548A: This 8-channel I2C multiplexer/demultiplexer provides expanded capacity for I2C bus expansion, supporting up to eight devices with the same I2C address.

3. CD74HC4067: Although not specifically designed for I2C applications, this 16-channel analog multiplexer/demultiplexer can be used as an alternative in certain scenarios where I2C compatibility is not required.

These alternative