The PCA9554PW is a sophisticated product from Texas Instruments, a renowned global semiconductor design and manufacturing company.

• Key Features: 8-bit I2C and SMBus, low power Input/Output (I/O) expander with interrupt and hot insertion.
• I/O Port: 8-bit I/O port that can be set to an input or output configuration.
• Frequency: 400 kHz.
• Interrupt Output: Configurable to alert the microcontroller when there is a change in input status.
• Hot-Insertion: Yes.
• Polarity Selection: Software programmable polarity selection for inputs.
• Hardware Address Pin: Enables up to four devices to share the same I2C bus or SMBus.
• Operating Temperature: -40°C to +85°C.
• Package: TSSOP16.
• Voltage Range: 2.3V to 5.5V.
• Standby Current: Low standby current.