Active production — 2.93V reset supervisor in SOT-23-3
The TPS3809K33DBVR is an active-production simple reset IC from Texas Instruments, monitoring a single 2.93V rail with a push-pull, active-low output. The SOT-23-3 package fits tight layouts where a discrete reset circuit would take more board area.
The 2.93V threshold is the exact trip point: when VDD drops below this level, the reset output goes low and stays low for at least 120ms after the supply recovers above the threshold. For a 3.3V rail, this threshold sits at roughly 89% of nominal, which is typical for brown-out protection — the supervisor asserts reset before the logic supply drops enough to cause erratic behaviour.
Temperature grade and package — industrial range, SOT-23-3 footprint
The SOT-23-3 footprint (TO-236-3 / SC-59 compatible) is a standard three-pin layout: GND, RESET, VDD. The small body means the reset IC sits next to the processor without consuming routing channels.
The part is ROHS3 compliant.