NXP Semiconductors Interface - Interface - I/O Expanders - PCA9555D,112 PCA9555D,112

The PCA9555D,112 is a 16-bit I¬=C-bus and SMBus I/O port expander designed for applications requiring additional GPIO. It features a 24-pin CMOS package and supports a power supply voltage range of 2.3 V to 5.5 V, with 5 V tolerant I/O pins. The device allows for individual I/O configuration, enabling each pin to be set as either an input or output. It includes a polarity inversion register and an active LOW interrupt output that signals when an input state changes. The PCA9555D,112 can operate at clock frequencies from 0 Hz to 400 kHz and is compatible with up to eight devices on the same I¬=C-bus/SMBus due to its adjustable address pins. The device also boasts low standby current and robust ESD protection, making it suitable for various applications such as sensors, switches, and LED control.