The LM809M3X-3.08/NOPB: When the voltage drops below that threshold, it pulls its output low (Active Low) and holds it there for a minimum 140ms reset timeout after the rail recovers — long enough for the downstream microcontroller or logic to finish its reset sequence. The output is push-pull, totem pole, so it drives the reset line directly without needing an external pull-up resistor. That saves one component on the board — handy when you are packing a design into a tight SOT-23-3 footprint. The single-channel monitoring makes it a straightforward fit for any 3.3V rail that needs a clean, glitch-free reset signal.
Active production and how to source it
Sourced through independent distribution channels.
How it compares to TL7702BID
Both are simple reset/power-on reset supervisors, but the TL7702BID offers both Active High and Active Low outputs with an open-drain/open-collector stage, while the LM809M3X-3.08/NOPB is strictly Active Low push-pull.