Threshold selection and BOM fit
The open-drain output allows wired-OR connection with other reset sources (e.g., a manual reset button or a watchdog timer). The active-low polarity is standard for most MCU reset inputs. The 140 ms minimum timeout is long enough to cover most power-supply ramp-up times and crystal oscillator start-up delays, but verify it against your specific processor's reset hold requirement.
It is RoHS non-compliant per the listing, so verify your assembly's RoHS exemption policy if you require lead-free solder — the part may contain lead in the termination finish.