CAT9554 Datasheet - Catalyst Semiconductor

CAT9554 8-Bit I2C and SMBus I/O Port

The CAT9554 and CAT9554A are CMOS devices that provide 8-bit parallel input/output port expansion for I2C and SMBus compatible applications. These I/O expanders provide a simple solution in applications where additional I/Os are needed: sensors, power switches, LEDs, pushbuttons, and fans. The CAT95.

CAT9554 Features

* I 400kHz I2C bus compatible

* I 2.3V to 5.5V operation I Low stand-by current I 5V tolerant I/Os I 8 I/O pins that default to inputs at power-up I High drive capability I Individual I/O configuration I Polarity inversion register I Active low interrupt output I Internal power-on reset I No glitch

CAT9554_CatalystSemiconductor.pdf