PCA9546A Datasheet PDF - NXP 4-channel I2C switch Specs

PCA9546A - 4-channel I2C switch

Datasheet Summary

Description

The PCA9546A 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 SCx/SDx channel or combination of channels can be selected, determined by the contents of the programmable control register.

Features

1-of-4 bidirectional translating switches.
I2C-bus interface logic; compatible with SMBus standards.
Active LOW reset input.
3 address pins allowing up to 8 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.

Datasheet Details

Part number	PCA9546A
Manufacturer	NXP
File Size	274.21 KB
Description	4-channel I2C switch
Datasheet	PCA9546A Datasheet
Additional preview pages of the PCA9546A datasheet.

📁 Similar Datasheet

PCA9546A - Low Voltage 4-Channel I2C and SMBus Switch (Texas Instruments)

PCA9541 - 2-to-1 I2C-bus master selector (NXP Semiconductors)

PCA9541A - 2-to-1 I2C-bus master selector (NXP Semiconductors)

PCA9542A - 2-channel I2C-bus multiplexer and interrupt logic (NXP Semiconductors)

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)

PCA9544A - Low Voltage 4-Channel I2C and SMBus Multiplexer (Texas Instruments)

PCA9545A - Low Voltage 4-channel I2C and SMbus Switch (Texas Instruments)

Full PDF Text Transcription

Click to expand full text

PCA9546A 4-channel I2C-bus switch with reset Rev. 6 — 30 April 2014 Product data sheet 1. General description The PCA9546A 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 SCx/SDx channel or combination of channels can be selected, determined by the contents of the programmable control register. An active LOW reset input allows the PCA9546A to recover from a situation where one of the downstream I2C-buses is stuck in a LOW state. Pulling the RESET pin LOW resets the I2C-bus state machine and causes all the channels to be deselected as does the internal Power-On Reset (POR) function.

Published: Nov 20, 2006 |