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PCA9543A - 2-Channel I2C Bus Switch

Datasheet Summary

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.

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.

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Datasheet preview – PCA9543A

Datasheet Details

Part number PCA9543A
Manufacturer Texas Instruments
File Size 1.02 MB
Description 2-Channel I2C Bus Switch
Datasheet download datasheet PCA9543A Datasheet
Additional preview pages of the PCA9543A datasheet.

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Full PDF Text Transcription

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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 1 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, and 5-V Buses • No Glitch on Power-up • Supports Hot Insertion • Low Standby Current • Operating Power-Supply Voltage Range of 2.3 V to 5.5 V • 5.
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