What this supervisor does in the circuit
The TPS3840PH30DBVRQ1: The push-pull, totem-pole output drives the reset line directly without needing an external pull-up resistor — one less component on the board, which matters when you are swapping a supervisor in a tight automotive ECU or industrial controller. With a typical reset timeout of 619ms, the part holds the system in reset long enough for the supply to stabilise after power-up or a brownout event, then releases cleanly.
Automotive temp range and package fit
Housed in a SOT-23-5 package (SC-74A), the footprint is standard and hand-solderable — no hot-air station needed for a field swap. The 5-pin layout with the active-high output on pin 1 is marked on the package body, so orientation is clear even without a board silkscreen. Surface-mount only; the small 5-lead package fits into space-constrained designs where a DIP-8 supervisor would not go.
The part is quoted to order, not held in ready inventory. The base product number TPS3840 covers multiple threshold and output options; the PH30 suffix specifies the 3V active-high variant.