TCA9539QPWRQ1

The TCA9539-Q1 is a 24-pin device that provides
16 bits of general purpose parallel input and output
(I/O) expansion for the two-line bidirectional I2C bus
(or SMBus protocol). The device can operate with a
power supply voltage (VCC) range from 1.65 V to 3.6
V. The device supports 100 kHz (I2C Standard mode)
and 400 kHz (I2C Fast mode) clock frequencies. I/O
expanders such as the TCA9539-Q1 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 TCA9539-Q1 include an interrupt
that is generated on the INT pin whenever an
input port changes state. The A0 and A1 hardware
selectable address pins allow up to four TCA9539-Q1
devices on the same I2C bus. The device can be reset
to its default state by cycling the power supply and
causing a power-on reset. Also, the TCA9539-Q1 has
a hardware RESET pin that can be used to reset the
device to its default state.
The TCA9539-Q1 I2C I/O expander is qualified for
automotive applications.