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PCA9543A Datasheet 2-Channel I2C Bus Switch

Manufacturer: Texas Instruments

General Description

The PCA9543A is a dual bidirectional translating switch controlled by the I2C bus.

The SCL/SDA upstream pair fans out to two downstream pairs, or channels.

Either individual SCn/SDn channel or both channels can be selected, determined by the contents of the programmable control register.

Overview

Product Folder Sample & Buy Technical Documents Tools & Software Support & Community PCA9543A SCPS169A – SEPTEMBER 2007 – REVISED JUNE 2014 PCA9543A 2-Channel I2C Bus Switch With Interrupt Logic and Reset.

Key Features

  • 1 1-of-2 Bidirectional Translating Switches.
  • I2C Bus and SMBus Compatible.
  • Two Active-Low Interrupt Inputs.
  • Active-Low Interrupt Output.
  • Active-Low Reset Input.
  • Two Address Pins Allowing up to Four PCA9543A Devices on the I2C Bus.
  • Channel Selection Via 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, an.