Datasheet4U Logo Datasheet4U.com

PCA9543 - 2-channel I2C switch

General Description

The PCA9543 is a bi-directional translating switch, controlled by the I2C-bus.

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

Any individual SCx/SDx channels or combination of channels can be selected, determined by the contents of the programmable control register.

Key Features

  • 1-of-2 bi-directional translating switches.
  • I2C interface logic; compatible with SMBus standards.
  • 2 Active LOW Interrupt Inputs.
  • Active LOW Interrupt Output.
  • Active LOW Reset Input.
  • 2 address pins allowing up to 4 devices on the I2C-bus.
  • Channel selection via I2C-bus, in any combination.
  • Power up with all switch channels deselected.
  • Low RdsON switches.
  • Allows voltage level translation between 1.8 V, 2.5 V.

📥 Download Datasheet

📁 Similar Datasheet

Part Number Description Manufacturer
PCA9543A 2-Channel I2C Bus Switch Texas Instruments
PCA9543A 2-channel I2C-bus switch NXP Semiconductors
PCA9543B 2-channel I2C-bus switch NXP Semiconductors
PCA9543C 2-channel I2C-bus switch NXP Semiconductors
PCA9541 2-to-1 I2C-bus master selector NXP Semiconductors

Other Datasheets by NXP Semiconductors

Part Number Description
PCA9540 2-channel I2C multiplexer
PCA9540B 2-channel I2C-bus multiplexer
PCA9542 2-channel I2C multiplexer and interrupt controller
PCA9544 4-channel I2C multiplexer and interrupt controller
PCA9544A 4-channel I2C-bus multiplexer

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
INTEGRATED CIRCUITS PCA9543 2-channel I2C switch with interrupt logic and reset Product data sheet Supersedes data of 2002 Feb 19 2004 Oct 01 Philips Semiconductors Philips Semiconductors Product data sheet 2-channel I2C switch with interrupt logic and reset PCA9543 FEATURES • 1-of-2 bi-directional translating switches • I2C interface logic; compatible with SMBus standards • 2 Active LOW Interrupt Inputs • Active LOW Interrupt Output • Active LOW Reset Input • 2 address pins allowing up to 4 devices on the I2C-bus • Channel selection via I2C-bus, in any combination • Power up with all switch channels deselected • Low RdsON switches • Allows voltage level translation between 1.8 V, 2.5 V, 3.