What the 2.8V threshold and 619ms timeout mean for your rail
The TPS3840DL28DBVR: For a 3.3V rail, that threshold sits at roughly 85% of nominal — early enough to catch a brownout before the downstream logic enters an undefined state, but not so high that normal load transients trigger false resets. The 619ms typical reset timeout holds the processor in reset for over half a second after the supply recovers. That is long enough for a bulk capacitor bank to recharge and for the oscillator to stabilise before the core starts fetching code — a deliberate margin for systems with slow-start power supplies or high inrush loads.
Temperature grade and board-fit for industrial and automotive environments
The SOT-23-5 package (SC-74A) is a standard 5-pin footprint with 0.95mm pitch.
Active lifecycle and compliance documentation
The standard TI compliance documentation package — RoHS declaration, REACH SVHC statement, and material composition data — is available for procurement and quality records.