The PCF8574APW from Texas Instruments is a sophisticated and high-performing remote 8-bit I/O expander for I2C-bus/SMBus applications.

• Feature: 8-bit quasi-bidirectional I/O port (P0–P7), including latched outputs with high current drive capability for directly driving LEDs.
• Feature: Interrupt output, which can be connected to the interrupt logic of the microcontroller.
• Benefit: Designed to free up your microcontroller from the burden of continuously polling I/O states, and it can provide an immediate response to changes.
• Voltage Range: Operates from a wide voltage range: 2.5V to 6V.
• Power Consumption: Low standby current consumption.
• Package: Comes in a TSSOP (PW) 16-pin package.
• Operational Temperature Range: -40°C to 85°C.