Datasheet4U Logo Datasheet4U.com

PCA9545A - Low Voltage 4-channel I2C and SMbus Switch

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.

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.

📥 Download Datasheet

📁 Similar Datasheet

Part Number Description Manufacturer
PCA9545A 4-channel I2C switch NXP
PCA9545 4-channel I2C switch with interrupt logic and reset NXP
PCA9540 2-channel I2C multiplexer NXP
PCA9540B 2-channel I2C-bus multiplexer NXP
PCA9541 2-to-1 I2C-bus master selector NXP Semiconductors

Other Datasheets by Texas Instruments

Part Number Description
PCA9543A 2-Channel I2C Bus Switch
PCA9544A Low Voltage 4-Channel I2C and SMBus Multiplexer
PCA9546A Low Voltage 4-Channel I2C and SMBus Switch
PCA9548A Low Voltage 8-Channel I2C Switch
PCA9515A Dual Bidirectional I2C Bus and SMBus Repeater

Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

View original datasheet text
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 Reset Functions 1 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 5-V Buses • No Glitch on Power-Up • Supports Hot Insertion • Low Standby Current • Operating Power-Supply Voltage Range of 2.