3.3V rail watchdog — what the reset output tells you
The TPS3702AX33DDCT is a single-channel voltage detector from TI that monitors a 3.3V supply rail and pulls its open-drain output low when the rail drops below threshold. That active-low reset signal is what you feed into an MCU reset pin or a PLD enable — the open-drain topology lets you wire-OR it with other fault signals on the same pull-up. The SOT-23-6 Thin package keeps the footprint small enough for dense regulator layouts.
Temperature range and package — bench-fit for industrial boards
The SOT-23-6 Thin package (TSOT-23-6) is a surface-mount part with a low profile — the exposed pad helps pull heat into the board copper, though the part itself dissipates very little power. Surface-mount only; no through-hole variant.
TI lists the TPS3702AX33DDCT as Active on the product status.