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Voltage detector with sense input and external delay capacitor
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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.

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Errata Sheet
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Key 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

Circuit Diagram

Design Resources


Technical Documentation

Product Specifications

Description Version Size
DS7019: Voltage detector with sense input and external delay capacitor
1.1 593 KB

Technical Notes & Articles

Description Version Size
TN0941: Reset and supervisor ICs: frequently asked questions (FAQ)
1.0 329 KB

Publications and Collaterals


Description Version Size
Resets and supervisors - portfolio overview
1,345 KB

Sample & Buy

Part Number Marketing StatusPackagePacking TypeVoltage Reset 1 (typ) Voltage Reset 2 (typ) Operating Temperature (min) Operating Temperature (max) Automotive GradeOrder From STUnit Price (US$)*
@ 1000
Distributor AvailabilityRoHS Compliance GradeDownload
Material Declaration**
STM1831L24WY6FActiveSOT23-5LTape And Reel-4085_-.35Distributor reported inventory date: 2016-02-05
Distributor NameRegionStockMin. order
ARROWOrder NowAMERICA57506000
ARROWOrder NowEUROPE150000

(*) Suggested Resale Price per unit (USD) for BUDGETARY USE ONLY. For quotes, prices in local currency, please contact your local ST Sales Office or our Distributors
(**) The Material Declaration forms available on may be generic documents based on the most commonly used package within a package family. For this reason, they may not be 100% accurate for a specific device. Please contact our sales support for information on specific devices.
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