AI01 - I2C MultiPlexer (PCA9548A)

Overview

This xCHIP is an interface module, based on the PCA9548A by NXP Semiconductors, which enables users to add more than one xChip with the same physical I2C address to a circuit. The PCA9548A operates as an I2C channel selector, this functionality is what enables communication with multiple I2C devices that have the same address. The channel selector ability is achieved through an octal bidirectional translating switch controlled by the I2C-bus.

Product Highlights

• Octal bidirectional translating switch
• I2C-bus interface logic; compatible with SMBus standards
• No glitch on power-up
• Supports hot insertion

Applications

• Communication systems
• Computer memory
• Telephone networks

Specifications

• Active LOW reset input
• Three hardware address pins allowing up to eight devices on the I2C-bus
• Channel selection via I2C-bus, in any combination
• Power-up with all switch channels deselected
• Low R^ON switches
• Low standby current
• 0 Hz to 400 kHz clock frequency

Datasheet

PCA9548A Datasheet