PCA9545A Datasheet PDF - Texas Instruments Low Voltage 4-channel I2C and SMbus Switch Specs

PCA9545A - Low Voltage 4-channel I2C and SMbus Switch

Datasheet Summary

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.

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.

Datasheet Details

Part number	PCA9545A
Manufacturer	Texas Instruments
File Size	1.92 MB
Description	Low Voltage 4-channel I2C and SMbus Switch
Datasheet	PCA9545A Datasheet
Additional preview pages of the PCA9545A datasheet.

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Full PDF Text Transcription

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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.

Published: May 15, 2020 |