PCA9546APWT - Texas Instruments

Manufacturer Part Number

PCA9546APWT

Manufacturer

Texas Instruments

Introduction

The PCA9546APWT is a 4-channel I2C-bus switch with interrupt logic, designed to provide multiplexing between devices on a bus, enabling seamless communication for applications with multiple I2C devices.

Product Features and Performance

4-channel I2C-bus switch with interrupt logic

Low on-resistance

High-current pass-through capability

I2C-bus interface logic; works with both standard and fast I2C-bus devices

Channel selection via I2C-bus

Active-LOW reset input

Active-LOW interrupt input

Low standby current

Power-up with all switch channels deselected

Low RON switches

5V tolerant I/Os

No glitch on power-up

Supports hot insertion

Product Advantages

Allows for expansion of I2C buses and manages signal routing without complex control

Features isolation, so when the power is turned off, it will not back-power the I2C-bus

Contributes to lower system power consumption

Compatible with a variety of voltage levels on I2C bus

Key Technical Parameters

Supply Voltage Range: 2.3V to 5.5V

4 I2C Bus channels

Surface Mount Package: 16-TSSOP

Operating Temperature Range: -40°C to 85°C

Quality and Safety Features

ESD protection exceeds JESD 22

Compatibility

Compatible with I2C and SMBus protocols

Works with multiple voltage level interfaces

Application Areas

Used as a translating switch in complex systems with multiple I2C or SMBus devices

Applies to consumer electronics, telecommunications, servers, and industrial segments where I2C-bus signal integrity is pivotal

Product Lifecycle

Obsolete - Check for replacement parts or newer alternatives

Potential discontinuation with options available for last-time buys

Several Key Reasons to Choose This Product

High integration reduces component count and simplifies design

Provides flexible I2C-bus connectivity for multiple peripheral devices

Supports hot-swapping of I2C-bus components

Ease of translation between 5V and 3.3V devices

Ensures data integrity with minimal signal degradation

Facilitates design upgrades with backward-compatible parts

Low power operation suitable for battery-powered applications