2.7V threshold supervisor with 619ms reset timeout
The TPS3840PL27DBVR is a single-channel power supply monitor from Texas Instruments that asserts a reset signal when the monitored rail drops below 2.7V. The reset output stays low for 619ms typical after the supply recovers — long enough to let a downstream MCU or SoC complete its power-on reset sequence before the core starts executing code. The push-pull output drives the reset line directly without an external pull-up resistor, saving one component per rail. The output is active low, compatible with most reset input logic.
No single-source risk — the part is widely stocked across the distribution network.