Description
The STM1831 is a voltage detector with very low current consumption. It monitors a voltage on a separate input pin (VSEN), which is fully functional even if the monitored voltage goes down to 0 V. In addition, the delay of the output can be adjusted by an external capacitor.

FEATUREs
■ Voltage monitored on separate sense
   input VSEN
■ Factory-trimmed voltage thresholds in 100 mV
   increments from 1.6 V to 5.7 V
■ ±2% voltage threshold accuracy
■ Operating voltage 1.6 V to 6.0 V
■ Open drain output
■ Low supply current of 0.8 µA (typ.)
■ Time delay programmable by external
   capacitor
■ Power supply transient immunity
■ Available in SOT23-5 package
■ Operating temperature –40 to 85 °C

APPLICATIONs
■ Microprocessor reset circuitry
■ Charge voltage monitors
■ Memory battery backup switch circuits
■ Power failure detection circuits