PCA9557 Datasheet (Texas Instruments) - Remote 8-Bit I2C and SMBus Low-Power I/O Expander

PCA9557, Remote 8-Bit I2C and SMBus Low-Power I/O Expander

This 8-bit I/O expander for the two-line bidirectional bus (I2C) is designed for 2.3-V to 5.5-V VCC operation.

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

The PCA9557 consists of one 8-bi

PCA9557 Features

* 1 Low Standby Current Consumption of 1 μA Max

* I2C to Parallel Port Expander

* Operating Power-Supply Voltage Range of 2.3 V to 5.5 V

* 5-V Tolerant I/O Ports

* 400-kHz Fast I2C Bus

* Three Hardware Address Pins Allow for Use of up to Eight Devices o