Smart, simple solutions for the 12 most common design concerns

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I2C Demonstration Board 2005-1 Quick Start Guide

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PHI

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2-channel I2C-bus multiplexer

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 theprogrammable control register.\nA power-on reset 1-of-2 bidirectional translating multiplexer\nI2C-bus interface logic; compatible with SMBus standards\nChannel selection via I2C-bus\nPower-up with all multiplexer channels deselected\nLow Ron switches\nAllows voltage level translation between 1.8 V, 2.5 V, 3.3 V and 5 V buses\nNo glitch on power-u;

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2-channel I2C-bus multiplexer

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 theprogrammable control register.\nA power-on reset 1-of-2 bidirectional translating multiplexer\nI2C-bus interface logic; compatible with SMBus standards\nChannel selection via I2C-bus\nPower-up with all multiplexer channels deselected\nLow Ron switches\nAllows voltage level translation between 1.8 V, 2.5 V, 3.3 V and 5 V buses\nNo glitch on power-u;

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PCA9540D

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