PCF8574T (SOP-16) Remote 8-Bit I/O Expander For I2C Bus - (AD73441)

Description:

The PCF8574 is a silicon CMOS circuit. It provides general-purpose remote I/O expansion for most microcontrollers via the two-line bidirectional bus (I2C). The device consists of an 8-bit quasi-bidirectional port and an I2C bus interface. The PCF8574 has low current consumption and includes latched outputs with high true drive capability to directly drive LEDs. It also features an interrupt line (INT) that can be connected to the microcontroller's interrupt logic. By sending an interrupt signal on this line, the remote I/O can inform the microcontroller if there is incoming data on its ports without having to communicate via the I2C bus. This means that the PCF8574 can remain a simple slave device.

Datasheet