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PCA9545A Datasheet Low Voltage 4-channel I2C and SMbus Switch

Manufacturer: Texas Instruments

General Description

The PCA9545A is a quad bidirectional translating switch controlled via the I2C bus.

The SCL/SDA upstream pair fans out to four 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.

Overview

Product Folder Sample & Buy Technical Documents Tools & Software Support & Community PCA9545A SCPS147D – OCTOBER 2005 – REVISED JUNE 2014 PCA9545A Low Voltage 4-channel I2C and SMbus Switch With Interrupt Logic and.

Key Features

  • 1 1-of-4 Bidirectional Translating Switches.
  • I2C Bus and SMBus Compatible.
  • Four Active-Low Interrupt Inputs.
  • Active-Low Interrupt Output.
  • Active-Low Reset Input.
  • Two Address Terminals, Allowing up to Four 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, and.