PCA9539 Datasheet (Texas Instruments) - Remote 16-Bit I2C and SMBus Low-Power I/O Expander

PCA9539, Remote 16-Bit I2C and SMBus Low-Power I/O Expander

This 16-bit I/O expander for the two-line bidirectional bus (I2C) is designed for 2.3-V to 5.5-V VCC operation.

It provides general-purpose remote I/O expansion for most microcontroller families via the I2C interface [serial clock (SCL), serial data (SDA)].

The PCA9539 consists of two 8-bit Configur

PCA9539 Features

* 1 Low Standby-Current Consumption of 1 μA Max

* I2C to Parallel Port Expander

* Open-Drain Active-Low Interrupt Output

* Active-Low Reset Input

* 5-V Tolerant I/O Ports

* Compatible With Most Microcontrollers

* 400-kHz Fast I2C Bus

* P