The PCF8574TS/3,118 is a robust, versatile I/O expander chip manufactured by NXP Semiconductors. This integrated circuit is designed to provide general-purpose remote I/O expansion via the two-wire bidirectional I²C-bus (Inter-Integrated Circuit) for most microcontroller families. Its primary function is to help microcontrollers interface with a variety of peripherals through a minimized number of pins, thereby simplifying the design and freeing up valuable GPIOs for other tasks.

Key Features

• I²C Interface: Operates as a slave device on the I²C-bus with multiple address options, allowing for up to eight devices on the same bus without address conflicts.
• 8-Bit Remote I/O Ports: Each port can be used as an input or output without the use of a microcontroller, enhancing design flexibility and reducing component count.
• Interrupt Output: An interrupt output is activated when any input state differs from its corresponding input port register state, which is particularly useful for detecting button presses or other input events.
• Low Standby Current: The device features a low standby current, making it suitable for battery-powered applications where power conservation is crucial.
• High Noise Immunity: Inputs and outputs are designed to withstand high levels of noise, ensuring reliable operation in electrically noisy environments.
• Package: The PCF8574TS/3,118 comes in a compact SSOP20 package, which is suitable for space-constrained applications.

Applications

The PCF8574TS/3,118 is ideally suited for a wide range of applications, including:

• Industrial control systems
• Sensor networks
• Home automation
• Robotics
• Portable electronics

Technical Specifications

• Supply Voltage: 2.5V to 6V
• Operating Frequency: Up to 400 kHz on the I²C-bus
• Operating Temperature: -40°C to +85°C

With its easy integration, low power consumption, and ability to drive multiple GPIOs, the PCF8574TS/3,118 is an excellent choice for expanding the I/O capabilities of your microcontroller-based projects and products.