PCA9670 Datasheet - NXP

PCA9670 Remote 8-bit I/O expander

The PCA9670 provides general-purpose remote I/O expansion via the two-wire bidirectional I2C-bus (serial clock (SCL), serial data (SDA)). The devices consist of eight quasi-bidirectional ports, 1 MHz 30 mA drive I2C-bus interface, three hardware address inputs and a reset input operating between 2.3.

PCA9670 Features

* I2C-bus to parallel port expander

* 1 MHz I2C-bus interface (Fast-mode Plus I2C-bus)

* SDA with 30 mA sink capability for 4000 pF buses

* Operating supply voltage 2.3 V to 5.5 V with 5.5 V tolerant I/Os held to VDD with 100 A current source

* 8-bit remote I/O pins that default

PCA9670_PhilipsSemiconductors.pdf