PCA9555—带中断的16位I2C和SMBus IO口产品

The PCA9555 is a 24-pin CMOS device that provides 16 bits of General Purpose parallel

Input/Output (GPIO) expansion for I2C-bus/SMBus applicaTIons and was developed to

enhance the NXP Semiconductors family of I2C-bus I/O expanders. The improvements

include higher drive capability, 5 V I/O tolerance, lower supply current, individual I/O

configuraTIon, and smaller packaging. I/O expanders provide a simple soluTIon when

addiTIonal I/O is needed for ACPI power switches, sensors, push buttons, LEDs, fans, etc.