The PCA9555PWR is a high-performance, low-power integrated circuit produced by Texas Instruments, a renowned name in the electronics industry.

• Description: 24-pin, surface-mount device in a TSSOP format.
• Function: 16-bit I2C and SMBus, low power I/O (input/output) expander.
• Voltage Range: 2.3 to 5.5 volts.
• Hardware Address Pins: Two pins allow up to four devices to share the same I2C-bus or SMBus.
• Maximum Frequency: 400kHz.
• Reset Input: Active-low reset input.
• Interrupt Output: Connected to the interrupt logic of the microcontroller.
• Power-On Reset: Internal.