PCA9555PWR TI I/O Expanders

The PCA9555PWR is a 16-bit I²C-bus and SMBus I/O expander from Texas Instruments featuring 16 general-purpose I/O pins programmable as input or output. It operates over a supply range of 2.3V to 5.5V and supports 100 kHz and 400 kHz clock frequencies. The device includes interrupt output for change detection, open-drain active-low reset input, and supports multiple device addresses. Housed in a 24-pin TSSOP (PW) package, it operates over -40°C to 85°C. Applications include GPIO expansion for microcontrollers, push-button sensing, LED control, and keypad scanning. In stock at HL Electronics – request a quote for fast delivery.