PCA9545 Datasheet (NXP) - 4-channel I2C switch with interrupt logic and reset

PCA9545, 4-channel I2C switch with interrupt logic and reset

The PCA9545 is a quad bi-directional translating switch controlled via the I2C bus.

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

Any individual SCx/SDx channel or combination of channels can be selected, determined by the contents of the programmable control register.

INTEGRATED CIRCUITS PCA9545 4-channel I2C switch with interrupt logic and reset Product data Supersedes data of 2001 Nov 08 2002 Mar 28 Philips Semiconductors Philips Semiconductors Product data 4-channel I2C switch with interrupt logic and reset PCA9545 passed by the PCA9545.

This allows the use of different bus voltages on each pair, so that 1.8 V or 2.5 V or 3.3 V parts can communicate with 5 V parts without any additional protection.

External pull-up resistors pull the bus up to the d

PCA9545 Features

* 1-of-4 bi-directional translating switches

* I2C interface logic; compatible with SMBus standards

* 4 active low interrupt inputs

* Active low interrupt output

* Active low reset input

* 2 address pins allowing up to 4 devices on the I2C bus