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PCA9540B

NXP
Part Number PCA9540B
Manufacturer NXP
Description 2-channel I2C-bus multiplexer
Published Mar 22, 2005
Detailed Description PCA9540B 2-channel I2C-bus multiplexer Rev. 7.1 — 19 January 2018 Product data sheet 1. General description The PCA954...
Datasheet PDF File PCA9540B PDF File

PCA9540B
PCA9540B

Overview
PCA9540B 2-channel I2C-bus multiplexer Rev.
7.
1 — 19 January 2018 Product data sheet 1.
General description The PCA9540B is a 1-of-2 bidirectional translating multiplexer, controlled via the I2C-bus.
The SCL/SDA upstream pair fans out to two 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.
A power-on reset function puts the registers in their default state and initializes the I2C-bus state machine with no channels selected.
The pass gates of the multiplexer are constructed such that the VDD pin can be used to limit the maximum high voltage that is passed by the PCA9540B.
This allows the u...


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