Three-rail monitoring in a six-pin SOT-23
The MAX6355RVUT is a multi-voltage supervisor that watches three supply rails — two fixed-threshold inputs at 1.58 V and 2.63 V, plus one adjustable input — and asserts a common active-low reset when any monitored voltage drops below its threshold.
What the threshold voltages mean for your rail budget
The 1.58 V threshold suits a 1.8 V core rail — it trips before the supply drops below the minimum operating voltage of most 1.8 V logic. The adjustable input lets you set a custom threshold with an external resistor divider, useful for a 1.2 V or 0.9 V rail that does not match the fixed thresholds. The three channels share one reset output, so a fault on any rail pulls the system reset line low.
Active production — sourcing for volume builds
The part is supplied in a six-pin SOT-23 package, which means it fits into a standard small-outline footprint with 0.95 mm pitch — the same pad layout used by many other supervisors and op-amps in this package, so a board spin to swap in a second-source part is unlikely to require a layout change.