PCA9544APWE4

Product Overview

• Category: Integrated Circuit
• Use: I2C Multiplexer
• Characteristics: Low-voltage, 4-channel multiplexer with interrupt logic
• Package: TSSOP-16
• Essence: Enables multiple I2C devices to share the same I2C bus
• Packaging/Quantity: Tape and Reel, 2500 units per reel

Specifications

• Supply Voltage: 1.65V to 5.5V
• Operating Temperature Range: -40°C to +85°C
• I2C Bus Compatibility: Standard-mode, Fast-mode, Fast-mode Plus
• Number of Channels: 4
• Interrupt Output: Active-low open-drain
• Standby Current: 10µA (typical)

Pin Configuration

The PCA9544APWE4 has a total of 16 pins arranged as follows:

```

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| | | 1 16 | | | | 2 15 | | | | 3 14 | | | | 4 13 | | | | 5 12 | | | | 6 11 | | | | 7 10 | | | | 8 9 | |_______________| ```

Functional Features

• Allows multiple I2C devices to be connected to a single I2C bus
• Channel selection through I2C-bus or dedicated pins
• Supports hot insertion
• Provides interrupt output for channel status detection
• Low standby current consumption for power efficiency

Advantages and Disadvantages

Advantages: - Simplifies I2C bus management in systems with multiple devices - Enables efficient utilization of I2C bus resources - Supports hot swapping of I2C devices

Disadvantages: - Limited to 4 channels, may not be suitable for applications requiring more channels - Requires additional control logic for channel selection

Working Principles

The PCA9544APWE4 is an I2C multiplexer that allows multiple I2C devices to share the same I2C bus. It operates by selectively connecting one of the four input channels to the output channel, effectively enabling communication with a specific device on the bus.

Channel selection can be done either through the I2C-bus using control registers or by setting dedicated pins. The multiplexer also provides an interrupt output that can be used to detect the status of each channel.

Detailed Application Field Plans

The PCA9544APWE4 finds applications in various scenarios where multiple I2C devices need to be connected to a single I2C bus. Some common application fields include:

1. Embedded Systems: Allows multiple sensors, actuators, and other peripherals to communicate over a shared I2C bus.
2. Industrial Automation: Enables efficient management of I2C-based control modules and sensors in industrial automation systems.
3. Consumer Electronics: Facilitates the integration of multiple I2C devices in consumer electronic products such as smartphones, tablets, and smart home devices.
4. Automotive Electronics: Supports the connection of various I2C-based automotive components, including sensors, displays, and control modules.

Detailed and Complete Alternative Models

1. PCA9548APW: An 8-channel I2C multiplexer with similar features and package options.
2. TCA9548A: A 8-channel I2C multiplexer with enhanced features like reset function and internal power-on reset.

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