PCA9555 Datasheet | Nexperia

Low-voltage 16-bit I²C-bus I/O port with interrupt and weak pull-up Rev. 1 - 25 April 2023 Product data sheet 1. General description The PCA9555 provides 16 bits of General Purpose Input/Output (GPIO) expansion for I²C-bus/SMBus applications. It is designed for a wide voltage range of 2.3 V to 5.5 V with interrupt and default pull-up resistors on GPIOs. Nexperia GPIO expanders provide an elegant solution when additional IOs are needed while keeping the interconnections to a minimum, for example, in ACPI power switches, sensors, push buttons, LEDs and fan control. The PCA9555 contains a set of 8 bit Input, Output, Configuration and Polarity Inversion registers. At power up all...