PCA9548A Low Voltage 8-Channel I2C Switch with Reset

The PCA9548A is a versatile 8-channel I2C switch that enables bidirectional communication between multiple I2C buses. It resolves I2C slave address conflicts by providing separate downstream channels controlled via a programmable register. Supporting voltage-level translation, it ensures compatibility between different bus voltage levels, making it ideal for applications requiring flexible, reliable I2C communication.

Features:

• Bidirectional Translating Switches: 1-of-8 configuration.
• I2C/SMBus Compatibility: Seamless integration with standard protocols.
• Reset Functionality: Active-low reset to recover from errors.
• Hot Insertion: Supports adding devices without powering down.
• Voltage-Level Translation: Works across 1.8 V, 2.5 V, 3.3 V, and 5 V buses.
• Power-Up Behavior: Channels deselected by default for safety.
• Low On-Resistance (RON): Ensures minimal signal degradation.
• Standby Current: Low power consumption during idle state.
• Expandable Addressing: Three hardware address pins allow up to eight PCA9548A devices on the same bus.

Applications:

• Server and network equipment
• Factory automation systems
• Products with I2C slave address conflicts (e.g., multiple sensors)
• Telecom switching equipment

PCA9548A Datasheet:

Package Include : 

1 x PCA9548A Low Voltage 8-Channel I2C Switch with Reset