2.941V threshold — the rail it watches
The TPS3110K33DBVR: That threshold is set for a nominal 3.3V rail with enough margin to catch a brownout before the downstream logic starts behaving unpredictably — the supervisor holds the processor in reset until the supply recovers and the 65ms minimum timeout elapses.
Active-low push-pull output — no external pull-up needed
The reset output is active low with a push-pull, totem-pole stage. That means the output drives both high and low — no open-drain, no external pull-up resistor required on the reset line. The push-pull stage holds the reset pin firmly at ground during the assertion period and drives it to VDD when the supply is valid, which eliminates the weak pull-up contention you can see with open-drain supervisors sharing a bus.
SOT-23-6 footprint and industrial temperature range
Housed in a SOT-23-6 package, the TPS3110K33DBVR fits the standard supervisor land pattern used across the industry — the same footprint as many other 6-pin voltage supervisors, so board layout reuse is straightforward.