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