Supervisor for a 5V rail — what the 4.38 V threshold means
The TLV809EA43DBZR: Simple reset/power-on reset supervisor that monitors a single voltage rail. Asserts a reset signal when the supply drops below a 4.38 V threshold. Reset is active-low, push-pull. The 130 ms minimum reset timeout holds the reset long enough for system stabilization.
Temperature grade and package — industrial and under-hood capable
The SOT-23-3 package is a three-pin footprint that fits tight layouts and is compatible with standard pick-and-place assembly. Surface-mount only — no through-hole variant.
Active lifecycle — no LTB concern for new builds
TI lists the TLV809EA43DBZR as Active. That means no last-time-buy window to track and no imminent obsolescence risk for production planning.