Active-low, open-drain output
Reset is active low — the output pulls low when the monitored voltage falls below the threshold, and stays low through the 150ms timeout after the supply recovers. The open-drain structure means you connect a pull-up resistor to the logic supply of the downstream device, not to the monitored rail. That decouples the supervisor from the processor supply and lets you use the same part across different logic families by swapping the pull-up voltage. The output can sink enough current to drive the reset input of most MCUs and FPGAs directly.
SOT-23-3 — footprint and fit
The SOT-23-3 package (also known as TO-236-3 or SC-59) is a three-lead surface-mount package that fits on a tight PCB. The supplier device package is SOT-23-3, so the land pattern is standard and shared with hundreds of other voltage supervisors and small-signal transistors. No special pad geometry required — just the usual SOT-23-3 footprint. The part is shipped in strip packaging (cut tape or tube), which suits prototype builds and small-run production. For reel quantities, check the alternate suffix.
Active production and compliance
It is ROHS3 compliant, so it passes the material declaration for EU and most global markets. No lead, no cadmium, no restricted phthalates. The compliance certificate is on file at the distributor level; the datasheet covers the full electrical spec.