TCA9554DBQR

The TCA9554 is a 16-pin device that provides 8 bits
of general purpose parallel input and output (I/O)
expansion for the two-line bidirectional I
2C bus (or
SMBus) protocol. The device can operate with a
power supply voltage ranging from 1.65 V to 5.5 V.
The device supports both 100-kHz (Standard-mode)
and 400-kHz (Fast-mode) clock frequencies. I/O
expanders such as the TCA9554 provide a simple
solution when additional I/Os are needed for
switches, sensors, push-buttons, LEDs, fans, and
other similar devices.
The features of the TCA9554 include an interrupt that
is generated on the INT pin whenever an input port
changes state. The A0, A1, and A2 hardware
selectable address pins allow up to eight TCA9554
devices on the same I
2C bus. The device can also be
reset to its default sate by cycling the power supply
and causing a power-on reset.