PCA9556 Datasheet (NXP) - Octal SMBus Registered Interface

PCA9556, Octal SMBus Registered Interface

The PCA9556 is a silicon CMOS circuit which provides parallel input/output expansion for SMBus applications.

The PCA9556 consists of an 8-bit input port register, 8-bit output port register, and an SMBus interface.

It has low current consumption and a high impedance open drain output pin, I/O0.

The

PCA9556 Features

* SMBus compliance with fixed 3.3V voltage levels

* Operating power supply voltage range of 3.0V

* 3.6V

* Active high polarity inverter register

* Write protect register

* Active low reset pin

* Low leakage current on power-down

* Nois