PCA9545A Datasheet (NXP) - 4-channel I2C switch

PCA9545A, 4-channel I2C switch

The PCA9545A is a quad bidirectional 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.

PCA9545A Features

* 1-of-4 bidirectional translating switches

* I2C-bus interface logic; compatible with SMBus standards

* Four active LOW interrupt inputs

* Active LOW interrupt output

* Active LOW reset input

* Two address pins allowing up to four devices on the I2C-b