I²C port expander for mixed-voltage buses
It provides eight push-pull GPIOs controllable over a two-wire serial bus, with a power-on reset (POR) feature that forces all outputs to a known state at startup.
400 kHz bus and interrupt handling
The I²C interface runs at 400 kHz (standard-mode), which is sufficient for polling eight GPIOs at sub-millisecond latency. If the bus is shared with high-speed peripherals like 1 MHz sensors, the 400 kHz ceiling becomes a scheduling constraint — budget the bus time accordingly. An interrupt output (active-low, open-drain) is available: any input change asserts INT, letting the host sleep until a button press or sensor edge wakes it. This is a practical power-saving feature for battery-powered edge nodes.
Active lifecycle, no last-time-buy risk
It is still in regular production through TI and its authorized distribution network. ROHS3 compliant.
Package and footprint
The 16-SSOP (0.209", 5.30 mm width) is a fine-pitch but hand-solderable surface-mount package. The supplier device package is 16-SSOP.