PCA9548ADBR

The PCA9548ADBR is an I2C-bus controlled octal bidirectional switch, designed for applications requiring multiple I2C buses or I2C devices. This IC allows a single master I2C bus to communicate with multiple slave devices or to isolate sections of an I2C bus system.

Pinout

(Note: The pin configuration below is a general representation. Refer to the specific datasheet for precise details.)

• GND: Ground connection
• VCC: Positive power supply
• SCL: I2C clock signal
• SDA: I2C data signal
• ADDR0-ADDR2: Chip address selection pins
• EN: Enable pin for turning on/off the switches
• INT: Interrupt output pin
• OE: Output enable pin

Circuit Diagram

Include a circuit diagram illustrating the connections and operation of the PCA9548ADBR IC for a visual representation.

Key Features

• Octal Bidirectional Switch: Allows control of up to 8 bidirectional channels.
• I2C-Bus Controlled: Enables easy configuration and switching of I2C buses or devices.
• Address Selection Pins: Provides flexibility in addressing multiple PCA9548ADBR devices on the same bus.
• Interrupt Output: Allows for efficient handling of interrupts in the I2C system.
• Output Enable: Enables or disables the I2C outputs for specific channels.

Note: For detailed technical specifications, please refer to the PCA9548ADBR datasheet.

Application

• Multi-Device Communication: Ideal for systems requiring communication with multiple I2C slave devices.
• I2C Bus Isolation: Useful for isolating sections of an I2C bus for troubleshooting or power saving.
• System Integration: Suitable for integrating multiple I2C devices into a single bus system.

Functionality

The PCA9548ADBR simplifies the management of multiple I2C devices by allowing a single master to communicate with multiple slaves through controlled switching of channels. It offers flexibility and efficiency in I2C bus applications.

Usage Guide

• Power Supply: Connect VCC (Pin 20) to the power supply voltage (2.3V to 5.5V).
• I2C Bus Connection: Connect SCL and SDA pins to the master and slave devices for I2C communication.
• Address Configuration: Set the address selection pins to assign a unique address to the PCA9548ADBR if multiple devices are used on the same bus.

Frequently Asked Questions

Q: How many bidirectional channels does the PCA9548ADBR support?
A: The PCA9548ADBR supports up to 8 bidirectional channels for flexible I2C communication.

Q: Can the PCA9548ADBR be used to expand the I2C capabilities of a microcontroller?
A: Yes, the PCA9548ADBR is commonly used to expand the I2C bus of a microcontroller by allowing communication with multiple I2C devices.