PCA9540B Datasheet (NXP) - 2-channel I2C-bus multiplexer

PCA9540B, 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 the programmable control register.

A power-on res

PCA9540B Features

* 1-of-2 bidirectional translating multiplexer

* I2C-bus interface logic; compatible with SMBus standards

* 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