Two-rail watchdog in a SOT-23-5
The reset output is active-low, open-drain, so it can be wire-ORed with other reset sources or pulled up to a different voltage than the monitored rails. The 140ms minimum reset timeout holds the system in reset long enough for the power supplies and oscillator to stabilise after a brownout or power-up.
Note that this variant is RoHS non-compliant. If your assembly requires RoHS compliance, verify the lead-free alternative before committing the BOM.
