2.93 V threshold — the brown-out trip point that matters
The STM811SW16F is a single-channel voltage supervisor from STMicroelectronics, built for simple reset/power-on reset duty. The reset is active low, push-pull, so it drives directly into the reset pin of most MCUs without an external pull-up.
ROHS3 compliant.
Package and mounting — SOT-143-4, surface-mount only
Supplied in a SOT-143-4 surface-mount package. The TO-253-4 / TO-253AA case code is the same footprint. Standard reflow profile for a small-outline transistor package applies — no special handling beyond MSL precautions.