TCA9548A - Texas Instruments

TCA9548A Low-Voltage 8-Channel I2C Switch

The TCA9548A device has eight bidirectional translating switches that can be controlled through the I2C bus. The SCL/SDA upstream pair fans out to eight downstream pairs, or channels. Any individual SCn/SDn channel or combination of channels can be selected, determined by the contents of the programmable control register. These downstream channels can be use.

Features

•1 1-to-8 Bidirectional translating switches
• I2C Bus and SMBus compatible
• Active-low reset input
• Three address pins, allowing up to eight TCA9548A devices on the I2C bus
• Channel selection through an I2C Bus, in any combination
• Power up with all switch channels deselected
• Low RON switches
• Allows voltage-level translation between 1.8-V, 2.5-V, 3.3-V, and 5-V buses
• No glitch on power up
• Supports hot insertion
• Low standby current
• Operating power-supply voltage range of 1.65 V to 5.5 V
• 5-V Tolerant inputs
• 0- to 400-kHz Clock frequency
• Latch-up performance exceeds 100 mA .