PCA9554 Overview
The PCA9554 is a CMOS device that provides 8−bit parallel input/output port expansion for I2C and SMBus patible applications. This I/O expander provides a simple solution in applications where additional I/Os are needed: sensors, power switches, LEDs, pushbuttons, and fans.
PCA9554 Key Features
- 400 kHz I2C Bus patible (Note 1)
- 2.3 V to 5.5 V Operation
- Low Standby Current
- 5 V Tolerant I/Os
- 8 I/O Pins that Default to Inputs at Power-up
- High Drive Capability
- Individual I/O Configuration
- Polarity Inversion Register
- Active Low Interrupt Output
- Internal Power-on Reset
