PCA9673 Datasheet (NXP Semiconductors) - Remote 16-bit I/O expander

PCA9673, Remote 16-bit I/O expander

The PCA9673 provides general purpose remote I/O expansion for most microcontroller families via the two-line bidirectional bus (I2C-bus) and is a part of the Fast-mode Plus family.

The PCA9673 is a drop in upgrade for the PCF8575 providing higher Fast-mode Plus (Fm+) I2C-bus speeds (1 MHz versus 400

PCA9673 Features

* 1 MHz I2C-bus interface

* Compliant with the I2C-bus Fast and Standard modes

* SDA with 30 mA sink capability for 4000 pF buses

* 2.3 V to 5.5 V operation with 5.5 V tolerant I/Os

* 16-bit remote I/O pins that default to inputs at power-up

* Latched outputs with 25 mA sink