DS1831AS

Supervisors Overview

The DS1831AS+ is a MicroMonitor multi-supply supervisory circuit manufactured by Analog Devices Inc./Maxim Integrated. It features four independent voltage monitoring channels housed in a 16-SOIC surface-mount package. The device supports fixed thresholds of 3.3V and 5V, alongside two adjustable threshold inputs for custom voltage levels. It provides open-drain or open-collector reset outputs with configurable timeout delays of 10ms, 100ms, or 1,000ms. Operating within a supply voltage range of 1V to 5.5V, it functions reliably across an industrial temperature range of -40°C to +85°C.

Supervisors Feature Summary

• Four-channel power supply supervision with dual fixed and dual adjustable voltage thresholds
• Configurable reset timeout delays selectable between 10ms, 100ms, and 1,000ms
• Open-drain/open-collector active-low reset output compatible with various logic families

Supervisors Applications

• Multi-rail embedded system power management
• Industrial control board voltage supervision
• Telecommunications equipment power integrity monitoring

Supervisors Procurement Notes

Verify the suffix designation carefully during procurement. The '+' indicates RoHS compliance. Confirm the specific letter suffix (e.g., A, B, E) matches the required voltage threshold configuration, as these letters denote distinct factory-set parameters rather than packaging variations. Ensure the source document explicitly defines the electrical characteristics for the exact suffix ordered.

Supervisors Selection Notes

Select this component when designing systems requiring simultaneous monitoring of multiple power rails with mixed fixed and variable requirements. The adjustable thresholds allow customization for non-standard voltages without external resistors. Verify that the required reset delay aligns with the available internal options of 10ms, 100ms, or 1,000ms, as external components cannot modify these timing parameters.

Supervisors Part Context

The DS1831 series belongs to Maxim Integrated's MicroMonitor family, designed for compact power supervision solutions. This specific part integrates multiple supervisor functions into a single 16-pin SOIC package, reducing board space compared to discrete solutions. It serves as a legacy component from the Dallas Semiconductor era, now maintained under Analog Devices after the acquisition.

Supervisors Replacement Considerations

DS1831BS+ is documented as a parameter-equivalent alternative within the same product family.