Texas Instruments PCF8574 Remote 8-Bit I/O Expander for I2C-Bus PCF8574DWG4

The PCF8574DWG4 is an 8-bit I/O expander designed for I2C bus applications, operating within a voltage range of 2.5V to 6V. It features a low standby current consumption of 10OºA maximum and provides a quasi-bidirectional I/O port (P0,ÄìP7) that can function as either input or output without requiring a data-direction control signal. The device includes latched outputs capable of driving high-current loads, such as LEDs, directly. This expander is compatible with a wide range of microcontrollers and includes an open-drain interrupt output. It is suitable for various applications, including telecom shelters, servers, routers, personal computers, and industrial automation, particularly in scenarios where GPIO-limited processors are used. The PCF8574DWG4 is available in multiple package options, including SOIC, making it versatile for different design requirements.