Voltage supervisor for low-voltage rail monitoring
The STM1061N21WX6F is a Simple Reset/Power-On Reset IC from STMicroelectronics that monitors a single voltage rail and asserts a reset signal when the supply drops below the 2.1V threshold. The 30µs typical propagation delay means the reset asserts quickly after a threshold crossing, suitable for glitch rejection on noisy rails.
Threshold and temperature range
With a 2.1V threshold, this part is designed to monitor a 2.5V or 3.3V supply rail — the reset triggers before the rail falls below the minimum operating voltage of most downstream logic. The SOT-23-3 package footprint is standard for small-signal transistors and supervisors — the same land pattern used for many ST voltage supervisors, easing board layout reuse.