pcf8574t datasheet

The PCF8574T is an 8-bit remote I/O expander for I2C-bus with an open-drain interrupt output that is designed to provide general-purpose remote I/O expansion for most microcontroller families via the I2C-bus interface. The device features an 8-bit quasi-bidirectional I/O port (P0-P7), including latched outputs with high-current drive capability for directly driving LEDs. Each I/O can be configured as an input or output by writing to the corresponding I/O configuration bit. The major benefit of the PCF8574T is its wide operating voltage range of 2.5V to 6V, making it suitable for a variety of applications. The PCF8574T also has low standby current consumption, making it an ideal choice for battery-powered applications. With its small footprint and versatile I/O capabilities, the PCF8574T is a reliable and cost-effective solution for expanding I/O capability in microcontroller-based systems.