PCA9544A Datasheet PDF - NXP 4-channel I2C-bus multiplexer Specs

PCA9544A - 4-channel I2C-bus multiplexer

Datasheet Summary

Description

The PCA9544A is a 1-of-4 bidirectional translating multiplexer, controlled via the I2C-bus.

The SCL/SDA upstream pair fans out to four SCx/SDx downstream pairs, or channels.

Only one SCx/SDx channel is selected at a time, determined by the contents of the programmable control register.

Features

1-of-4 bidirectional translating multiplexer.
I2C-bus interface logic; compatible with SMBus.
4 active LOW interrupt inputs.
Active LOW interrupt output.
3 address pins allowing up to 8 devices on the I2C-bus.
Channel selection via I2C-bus.
Power-up with all multiplexer 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 st.

Datasheet Details

Part number	PCA9544A
Manufacturer	NXP
File Size	271.16 KB
Description	4-channel I2C-bus multiplexer
Datasheet	PCA9544A Datasheet
Additional preview pages of the PCA9544A datasheet.

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Full PDF Text Transcription

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PCA9544A 4-channel I2C-bus multiplexer with interrupt logic Rev. 5 — 23 April 2014 Product data sheet 1. General description The PCA9544A is a 1-of-4 bidirectional translating multiplexer, controlled via the I2C-bus. The SCL/SDA upstream pair fans out to four SCx/SDx downstream pairs, or channels. Only one SCx/SDx channel is selected at a time, determined by the contents of the programmable control register. Four interrupt inputs, INT0 to INT3, one for each of the SCx/SDx downstream pairs, are provided. One interrupt output, INT, which acts as an AND of the four interrupt inputs, is provided. A power-on reset function puts the registers in their default state and initializes the I2C-bus state machine with no channels selected.

Published: May 10, 2007 |